Dr. Julien Woillez Profile

Dr. Julien Woillez

VLTI Project Scientist at European Southern Observatory

SPIE Involvement:

Author

Publications (89)

Proceedings Article | 3 September 2024 Presentation + Paper

Presentation + Paper

MATISSE, the VLTI mid-infrared spectro-interferometric imager: achievements and perspectives

Romain Petrov, Stéphane Lagarde, Bruno Lopez, Sylvie Robbe-Dubois, James Leftley, Claudia Paladini, Mathis Houllé, Gerd Weigelt, Roy van Boekel, Walter Jaffe, Julien Woillez, Philippe Berio, Felix Bettonvil, Pierre Bourget, Eddy Eldswijk, Alexis Matter, Anthony Meilland, Florentin Millour, Laurent Pallanca, Thomas Rivinius, Gérard Zins

Proceedings Volume 13095, 130950C (2024) https://doi.org/10.1117/12.3019899

KEYWORDS: Equipment, Mid infrared, Spectral resolution, Stars, Sensors, Observatories, Imaging systems, Telescopes, Stellar interferometry, Optical path differences

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Proceedings Article | 28 August 2024 Presentation + Paper

Presentation + Paper

GRAVITY+ Wide: towards hundreds of z ∼ 2 AGN, larger throughput and improved vibrational control

Maximilian Fabricius, Julien Woillez, Roberto Abuter, Guillaume Bourdarot, Pierre Bourget, Wolfgang Brandner, Amit Brara, Denis Defrère, Antonia Drescher, Frank Eisenhauer, Helmut Feuchtgruber, Robert Frahm, Reinhard Genzel, Stefan Gillessen, Frédéric Gonté, Vishaal Gopinath, Jonas Graf, Michael Hartl, Frank Haußmann, Sebastian Hönig, Matthew Horrobin, Paulo J. Garcia, Tilo Jilg, Laura Kreidberg, Romain Laugier, Jean-Baptiste Le Bouquin, Mari Lena Bolzer, Dieter Lutzke, Nikhil More, Thomas Ott, Hakan Özdemir, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Christian Rehm, Jonas Sauter, Nicolas Schuhler, Daniel Schuppe, Jinyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Patrick Wessely, Felix Widmann, Ekkehard Wieprecht, Lukas Wimmer, Senol Yazici, Hagen Prowatke, Ralf Böttcher

Proceedings Volume 13095, 130950B (2024) https://doi.org/10.1117/12.3019984

KEYWORDS: Astronomical interferometers, Control systems, Beam path, Mirrors, Vibration, Vibration control, Telescopes, Optical benches, Optical path differences

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Proceedings Article | 28 August 2024 Presentation + Paper

Presentation + Paper

VLTI Unit Telescope coudé train vibration control upgrade for GRAVITY+

Romain Laugier, Julien Woillez, Denis Defrère, Benjamin Courtney-Barrer, Muhammad Salman, Babak Sedghi, Roberto Abuter, Azzurra Bigioli, Maximilian Fabricius, Frank Eisenhauer, Frédéric Gonté, Nicolas Schuhler, Dieter Lutz, Miguel Riquelme, Pierre Bourget, Philippe Neuville, Sylvestre Lacour, Mathias Nowak

Proceedings Volume 13095, 130950M (2024) https://doi.org/10.1117/12.3018146

KEYWORDS: Tunable filters, Vibration, Actuators, Mirrors, Telescopes, Accelerometers, Sensors, Vibration control

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Proceedings Article | 28 August 2024 Poster + Paper

Poster + Paper

Opto-mechanical design of GRAVITY+ wavefront sensor

Nikhil More, Reinhard Genzel, Frank Eisenhauer, Dieter Lutz, Stefan Gillessen, Josef Schubert, Michael Hartl, Frank Haussmann, Christian Rehm, Harald Weisz, Şenol Yazici, Helmut Feuchtgruber, Christian Rau, Sinem Uysal, Guillaume Bourdarot, Ekkehard Wieprecht, Thomas Ott, Maximilian Fabricius, Felix Widmann, Antonia Drescher, Jingyi Shangguan, Taro Shimizu, Frederic Gonté, Julien Woillez, Nicolas Schuhler, Pierre Bourget, Sylvain Oberti, Jean-Baptiste Le Bouquin, Thibaut Paumard, Florentine Millour, Christian Straubmeier, Laura Kreidberg, Paulo Garcia, Tiago Gomes, Sebastian Hoenig, Denis Defrére

Proceedings Volume 13095, 130952E (2024) https://doi.org/10.1117/12.3018880

KEYWORDS: Wavefront sensors, Design, Adaptive optics, Sensors, Beam splitters, Interfaces, Tolerancing, Telescopes

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Proceedings Article | 28 August 2024 Presentation + Paper

Presentation + Paper

GRAVITY for MATISSE

J. Woillez, R. Petrov, R. Abuter, F. Allouche, P. Berio, R. Dembet, F. Eisenhauer, R. Frahm, F. Gonté, X. Haubois, M. Houllé, W. Jaffe, S. Lacour, S. Lagarde, J. Leftley, B. Lopez, A. Matter, A. Meilland, F. Millour, M. Nowak, C. Paladini, T. Rivinius, D. Salabert, N. Schuhler, J. Varga, G. Zins

Proceedings Volume 13095, 130950L (2024) https://doi.org/10.1117/12.3019993

KEYWORDS: Exoplanets, Adaptive optics, L band, Observatories, Large telescopes, K band, Interferometry

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Proceedings Article | 28 August 2024 Poster + Paper

Poster + Paper

GRAVITY+ adaptive optics (GPAO) tests in Europe

Florentin Millour, Guillaume Bourdarot, Jean-Baptiste Le Bouquin, Anthony Berdeu, Mathis Houllé, Philippe Berio, Thibaut Paumard, Denis Defrère, Paulo Garcia, Ferreol Soulez, Sebastian Hoenig, Fatmé Allouche, Martin Bachbucher, Christophe Bailet, Cyrille Blanchard, Olivier Boebion, Henri Bonnet, Amit Brara, Marcel Carbillet, Stephan Czempiel, Alain Delboulbé, Roderick Dembet, Clémence Edouard, Frank Eisenhauer, Helmut Feuchtgruber, Christoph Furchstsam, Stefan Gillessen, Armin Goldbrunner, Tiago Gomes, Carole Gouvvret, Sylvain Guieu, Mike Hartl, Johannes Hartwig, Frank Haussmann, David Huber, Ihsan Ibn Taïeb, Johann Kolb, Stéphane Lagarde, Olivier Lai, James Leftley, Dieter Lutz, Yves Magnard, Aurélie Marcotto, Hugo Nowacki, Sylvain Oberti, Thomas Ott, Christian Rau, Sylvie Robbe-Dubois, Jules Scigliuto, Franz Soller, Pavel Shchekaturov, Daniel Schuppe, Eric Stadler, Sinem Uysal, Felix Widmann, Ekherhard Wieprecht, Julien Woillez, Şenol Yazici

Proceedings Volume 13095, 1309520 (2024) https://doi.org/10.1117/12.3020269

KEYWORDS: Matrices, Adaptive optics, Wavefront sensors, Calibration, Cameras, Point spread functions, Telescopes, Optical testing, Laser guide stars, Real-time computing

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Proceedings Article | 28 August 2024 Presentation + Paper

Presentation + Paper

L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans

Denis Defrère, Romain Laugier, Marc-Antoine Martinod, Germain Garreau, Kwinten Missiaen, Muhammad Salman, Gert Raskin, Colin Dandumont, Steve Ertel, Michael Ireland, Stefan Kraus, Lucas Labadie, Alexandra Mazzolli, Gyorgy Medgyesi, Ahmed Sanny, Olivier Absil, Peter Ábráham, Jean-Philippe Berger, Myriam Bonduelle, Azzurra Bigioli, Emilie Bouzerand, Josh Carter, Nick Cvetojevic, Benjamin Courtney-Barrer, Adrian Glauser, Simon Gross, Xavier Haubois, Noel James, Andras Peter Joo, Stephane Lagarde, Alain Léger, Jarron Leisenring, Jérôme Loicq, Guillermo Martin, Frantz Martinache, Gyorgy Mezo, Sébastien Morel, Johan Morren, Marc Ollivier, Gordon Robertson, Hélène Rousseau, Warrick Schofield, Nicolas Schuhler, Adam Taras, Bart Vandenbussche, Julien Woillez

Proceedings Volume 13095, 130950F (2024) https://doi.org/10.1117/12.3019922

KEYWORDS: Equipment, Planets, Nulling interferometry, Interferometers, Stars, Exoplanets, Sensors, Photonics, Observational astronomy, Design

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Proceedings Article | 28 August 2024 Presentation

Presentation

GRAVITY+ wavefront sensors: high-contrast, laser guide star, adaptive optics systems for the VLTI

Guillaume Bourdarot, Frank Eisenhauer, Şenol Yazıcı, Helmut Feuchtgruber, Jean-Baptiste Le Bouquin, Michael Hartl, Christian Rau, Jonas Graf, Nikhil More, Ekkehard Wieprecht, Frank Haussmann, Felix Widmann, Dieter Lutz, Reinhard Genzel, Frederic Gonté, Sylvain Oberti, Johann Kolb, Julien Woillez, Henri Bonnet, Daniel Schuppe, Amit Brara, Johannes Hartwig, Armin Goldbrunner, Christoph Furchtsam, Franz Soller, Stefan Czempiel, Johann Eibl, David Huber, Sinem Uysal, Irmgard Treffler, Hakan Özdemir, Vishaal Gopinath, Pierre Bourget, Anthony Berdeu, Stefan Gillessen, Thomas Ott, Philippe Berio, Olivier Boebion, Florentin Millour, Roderick Dembet, Clémence Edouard, Tiago Gomes, Taro Shimizu, Antonia Drescher, Maximilian Fabricius, Jinyi Shangguan, Stéphane Lagarde, Sylvie Robbe-Dubois, Fatmé Allouche, Hugo Nowacki, Denis Defrère, Paulo J. Garcia, Sebastian Hoenig, Laura Kreidberg, Thibaut Paumard, Christian Straubmeier

Proceedings Volume 13095, 130950N (2024) https://doi.org/10.1117/12.3018388

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Proceedings Article | 28 August 2024 Presentation

Presentation

New GRAVITY+ observing modes to push for fainter and more precise observations

Antonia Drescher, Michaela Benthaus, Guillaume Bourdarot, Wolfgang Brandner, Denis Defrère, Frank Eisenhauer, Maximilian Fabricius, Helmut Feuchtgruber, Paulo Garcia, Reinhard Genzel, Stefan Gillessen, Frederic Gonte, Jonas Graf, Michael Hartl, Frank Haussmann, Sebastian Hönig, Laura Kreidberg, Jean-Baptiste Le Bouquin, Dieter Lutz, Felix Mang, Florentin Millour, Nikki More, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Christian Rau, Jingyi Shangguan, Taro Shimizu, Christian Straubmeier, Matthias Subroweit, Sinem Uysal, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Julien Woillez, Senol Yazici

Proceedings Volume 13095, 130950O (2024) https://doi.org/10.1117/12.3018972

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Proceedings Article | 28 August 2024 Presentation

Presentation

The VLTI in the GRAVITY+ era (VLTI status update)

Julien Woillez

Proceedings Volume 13095, 130950A (2024) https://doi.org/10.1117/12.3020042

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Proceedings Article | 28 August 2024 Presentation

Presentation

Image reconstruction in optical/near-infrared interferometry with Information Field Theory

Felix Mang, Guillaume Bourdarot, Wolfgang Brandner, Antonia Drescher, Frank Eisenhauer, Torsten Enßlin, Helmut Feuchtgruber, Gert Finger, Natascha Förster Schreiber, Paulo J. Garcia, Reinhard Genzel, Stefan Gillessen, Michael Hartl, Jakob Knollmüller, Jean-Baptiste Le Bouquin, Dieter Lutzke, Nikhil More, Thomas Ott, Thibaut Paumard, Karine Perraut, Guy Perrin, Sebastian Rabien, Diogo Ribeiro, Matteo Sadun Bordoni, Jinyi Shangguan, Taro Shimizu, Julia Stadler, Christian Straubmeier, Eckhard Sturm, Linda Tacconi, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Julien Woillez

Proceedings Volume 13095, 1309518 (2024) https://doi.org/10.1117/12.3020088

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Proceedings Article | 28 August 2024 Poster

Poster

Characterizing water vapour seeing for METIS HCI

Prashant Pathak, Olivier Absil, Ben Courtney-Barrer, Christian Delacroix, Gilles Orban de Xivry, Julien Woillez, Alexis Matter, Philippe Bério, Roy van Boekel

Proceedings Volume 13097, 130974C (2024) https://doi.org/10.1117/12.3019987

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

Infrastructure upgrade of Antu, Kueyen, and Melipal for the implementation of laser guide stars for the GRAVITY+ project

Michael Tucker Booth, Malte Scherbarth, Frédéric Gonté, Jose Antonio Abad, Bernardo Aguilera, Patricio Alarcon, Iván Alvarez, Luis Alvial, Eduardo Atton, Alexis Beltran, Israel Barraza, Pablo Barriga, Helen Bedigan, Christopher Binimelis, Oscar Briones, Rodrigo Candia, Luis Caniguante, Robin Capocci, Cesar Cardenas, Danissa Cardenas, Abdón Chala, Reinaldo Contreras, Ralf Conzelmann, Alain Delboulbé, Francoise Delplancke, Juan Diaz, Alejandro Doberti, Max Engelhardt, Jorge Fernandez, Eloy Fuenteseca, Fernando Garcia, Christian Garrido, Paul Garrido, Iván Guidolin, Pablo Gutierrez, Ronald Guzman, Wolfgang Hackenberg, Yerko Juica, Jean-Paul Kirchbauer, Demostenes Kirkmann, Peter Krempl, Juan Lorenzo, Alfredo Mella, Jhorvis Meza, Felipe Miranda, Sebastian Nunes, Sylvain Oberti, Francisco Olivares, Mario Opazo, Miguel Riquelme, Jordán Rivera, Miguel Robles, Fernando Salgado, Sylvain Rochat, Edson Rojas, Nicolas Schuler, Izzy Tambay, Richard Tamblay, Esteban Unmanzor, Herman Vega, Francisco Villanueva, Ricardo Whilem, Julien Woillez, Juan Zúñiga, Luis Zúñiga

Proceedings Volume 13096, 130969A (2024) https://doi.org/10.1117/12.3020005

KEYWORDS: Safety, Telescopes, Laser guide stars, Mirrors, Equipment, Large telescopes, Astronomical interferometers, Observatories

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

Impact of water vapor seeing on mid-infrared high-contrast imaging at ELT scale

Olivier Absil, Christian Delacroix, Gilles Orban de Xivry, Prashant Pathak, Matthew Willson, Philippe Berio, Roy van Boekel, Alexis Matter, Denis Defrère, Leo Burtscher, Julien Woillez, Bernhard Brandl

Proceedings Volume 12185, 1218511 (2022) https://doi.org/10.1117/12.2627972

KEYWORDS: Wavefronts, Turbulence, Refractive index, Water, Mid-IR, Phase measurement, Wavefront sensors, Coronagraphy

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Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

VLTI status update

Xavier Haubois, Antoine Mérand, Roberto Abuter, Juan Pablo Araneda, Fuyan Bian, Pierre Bourget, Paul Bristow, Pablo Burgos, Françoise Delplancke-Ströbele, Roderick Dembet, Juan Pablo Gil, Andreas Glindemann, Frédéric Gonté, Patricia Guajardo, Norbert Hubin, Christian Hummel, Heidi Korhonen, Aaron Labdon, Johann Kolb, Johan Kosmalski, Sylvestre Lacour, Claudia Paladini, Laurent Pallanca, Luca Pasquini, Isabelle Percheron, Miguel Riquelme, Thomas Rivinius, Eleonora Sani, Linda Schmidtobreick, Peter Scicluna, Markus Schöller, Nicolas Schuhler, Konrad Tristram, Markus Wittkowski, Julien Woillez, Gérard Zins

Proceedings Volume 12183, 1218306 (2022) https://doi.org/10.1117/12.2635405

KEYWORDS: Telescopes, Astatine, Observatories, Adaptive optics, Spatial resolution, Polarization, Polarimetry, Optical spheres, L band, Data archive systems

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Proceedings Article | 26 August 2022 Poster + Paper

Poster + Paper

Measuring and compensating vibrations at the VLTI: MANHATTAN-II self-intrinsic noise and hardware extension

A. Bigioli, B. Courtney-Barrer, R. Abuter, F. Eisenhauer, F. Gonte, R. Laugier, G. Raskin, M. Riquelme, M. Salman, N. Schuhler, J. Woillez, D. Defrère

Proceedings Volume 12183, 121831Z (2022) https://doi.org/10.1117/12.2629168

KEYWORDS: Vibration control, Sensors, Mirrors, Optical amplifiers, Telescopes, Amplifiers, Interferometry, Fringe analysis, Atmospheric modeling

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Proceedings Article | 26 August 2022 Poster + Paper

Poster + Paper

Building a GRAVITY+ adaptive optics test bench

Florentin Millour, Philippe Bério, Stéphane Lagarde, Sylvie Robbe-Dubois, Carole Gouvret, Olivier Lai, Fatmé Allouche, Christophe Bailet, Olivier Boebion, Marcel Carbillet, Aurélie Marcotto, Alain Spang, Paul Girard, Nicolas Mauclert, Jean-Baptiste Lebouquin, Thibaut Paumard, Férréol Soulez, Julien Woillez, Nikhil More, Frank Eisenhauer, Christian Straubmeier, Laura Kreidberg, Paulo Garcia, Sebastian Hoenig

Proceedings Volume 12183, 121831X (2022) https://doi.org/10.1117/12.2627105

KEYWORDS: Adaptive optics, Telescopes, Mirrors, Device simulation, Point spread functions, Computer aided design, Deformable mirrors, Optical simulations, Wavefront sensors, Optical testing, Astronomical interferometry, Long baseline optical interferometry

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Proceedings Article | 26 August 2022 Poster + Paper

Poster + Paper

Towards a better understanding of OPD limitations for higher sensitivity and contrast at the VLTI

B. Courtney-Barrer, J. Woillez, R. Laugier, A. Bigioli, N. Schuhler, P. Guajardo, V. Lizana, N. Behara, F. Eisenhauer, M. Ireland, X. Haubois, D. Defrère

Proceedings Volume 12183, 1218328 (2022) https://doi.org/10.1117/12.2628835

KEYWORDS: Mirrors, Telescopes, Waveguides, Oscillators, Wavefronts, Astatine, Atmospheric modeling, Adaptive optics, Waveguide modes, Digital filtering

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

L-band nulling interferometry at the VLTI with Asgard/Hi-5: status and plans

Denis Defrère, Azzurra Bigioli, Colin Dandumont, Germain Garreau, Romain Laugier, Marc-Antoine Martinod, Olivier Absil, Jean-Philippe Berger, Emilie Bouzerand, Benjamin Courtney-Barrer, Alexandre Emsenhuber, Steve Ertel, Jonathan Gagne, Adrian Glauser, Simon Gross, Michael Ireland, Harry-Dean Kenchington, Jacques Kluska, Stefan Kraus, Lucas Labadie, Viktor Laborde, Alain Léger, Jarron Leisenring, Jérôme Loicq, Guillermo Martin, Johan Morren, Alexis Matter, Alexandra Mazzoli, Kwinten Missiaen, Salman Muhammad, Marc Ollivier, Gert Raskin, Hélène Rousseau, Ahmed Sanny, Simon Verlinden, Bart Vandenbussche, Julien Woillez

Proceedings Volume 12183, 121830H (2022) https://doi.org/10.1117/12.2627953

KEYWORDS: Stars, Planets, Exoplanets, Nulling interferometry, L band, Telescopes, Interferometers, Astronomy, Spectral resolution, Interferometry

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

GRAVITY+ Wide: towards hundreds of z ~ 2 AGN

Antonia Drescher, Maximilian Fabricius, Taro Shimizu, Julien Woillez, Pierre Bourget, Felix Widmann, Jinyi Shangguan, Christian Straubmeier, Matthew Horrobin, Nicolas Schuhler, Frank Eisenhauer, Frederic Gonté, Stefan Gillessen, Thomas Ott, Guy Perrin, Thibaut Paumard, Wolfgang Brandner, Laura Kreidberg, Karine Perraut, Jean-Baptiste Le Bouquin, Paulo Garcia, Sebastian Hönig, Denis Defrère, Guillaume Bourdarot, Helmut Feuchtgruber, Reinhard Genzel, Michael Hartl, Frank Haussmann, Dieter Lutz, Nikhil More, Christian Rau, Jonas Sauter, Sinem Uysal, Patrick Wessely, Ekkehard Wieprecht, Lukas Wimmer, Senol Yazici

Proceedings Volume 12183, 121830T (2022) https://doi.org/10.1117/12.2628921

KEYWORDS: Fourier transforms, Visibility, Mirrors, Stars, Atmospheric turbulence, Atmospheric modeling, Adaptive optics, Relays, Turbulence

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Proceedings Article | 26 August 2022 Poster + Paper

Poster + Paper

The expected performance of nulling at the VLTI down to five mas

Romain Laugier, Denis Defrère, Alexis Matter, Simon Gross, Benjamin Courtney-Barrer, Felix Dannert, Julien Woillez, Olivier Absil, Colin Dandumont

Proceedings Volume 12183, 1218321 (2022) https://doi.org/10.1117/12.2629292

KEYWORDS: Stars, Nulling interferometry, Error analysis, Monte Carlo methods, Dispersion, Spectral resolution, Sensors, Planets, Wavefronts

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

STELLIM: a Stellar Imager at VLTI

Xavier Haubois, Nicolas Schuhler, Pierre Bourget, Julien Woillez, Nick Cvetojevic

Proceedings Volume 12183, 121831T (2022) https://doi.org/10.1117/12.2629240

KEYWORDS: Telescopes, Interferometry, Imaging systems, Image restoration, Optical instrument design, Optical fibers, Imaging arrays, Convection

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

MATISSE, the VLTI mid-infrared imaging spectro-interferometer at the time of the first published astrophysical results

Stéphane Lagarde, Anthony Meilland, Bruno Lopez, Romain Petrov, Fatmé Allouche, Alexis Matter, Jean-Charles Augereau, Phillippe Berio, Felix Bettonvil, Roy van Boekel, Paul Bristow, Pierre Cruzalèbes, William Danchi, Andreas Glindemann, Massinissa Hadjara, Mathias Henninger, Michiel Hogerheijde, Walter Jaffe, James Leftley, Michael Lehmitz, Florentin Millour, Claudia Paladini, Eric Pantin, Miguel Riquelme, Thomas Rivinius, Sylvie Robbe-Dubois, Markus Schoeller, Jozsef Varga, Gerd Weigelt, Julien Woillez, Gérard Zins

Proceedings Volume 12183, 121830A (2022) https://doi.org/10.1117/12.2630164

KEYWORDS: Stars, Mid-IR, Spectral resolution, Telescopes, Visibility, Sensors, Observatories, Atmospheric optics, Astatine, Planets

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

GRAVITY faint: reducing noise sources in GRAVITY+ with a fast metrology attenuation system

Felix Widmann, Stefan Gillessen, Thomas Ott, Taro Shimizu, Frank Eisenhauer, Maximilian Fabricius, Julien Woillez, Frédéric Gonté, Matthew Horrobin, Jingyi Shangguan, Senol Yazici, Guy Perrin, Thibaut Paumard, Wolfgang Brandner, Laura Kreidberg, Christian Straubmeier, Karin Perraut, Jean-Baptiste Le Bouquin, Paulo Garcia, Sebastian Hönig, Denis Defrère, Guillaume Bourdarot, Antonia Drescher, Helmut Feuchtgruber, Reinhard Genzel, Michael Hartl, Dieter Lutz, Nikhil More, Christian Rau, Sinem Uysal, Ekkehard Wieprecht

Proceedings Volume 12183, 121830U (2022) https://doi.org/10.1117/12.2628813

KEYWORDS: Astronomical interferometers, Near infrared, Metrology, Laser metrology, Sensors, Signal to noise ratio, Backscatter, Telescopes, Fourier transforms, Stars, Diodes, Fiber couplers

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Proceedings Article | 26 August 2022 Presentation + Paper

Presentation + Paper

Digging a dark hole in GRAVITY: towards Jupiter-like observations at the astronomical unit scale

Nicolas Pourré, Jean-Baptiste Le Bouquin, Julien Woillez, Alexis Carlotti, Lucie Leboulleux, Karine Perraut, Sylvestre Lacour

Proceedings Volume 12183, 121830V (2022) https://doi.org/10.1117/12.2629823

KEYWORDS: Planets, Adaptive optics, Exoplanets, Telescopes, Wavefronts, Interferometry, Diffraction, Atmospheric optics

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Proceedings Article | 30 December 2020 Presentation + Paper

Presentation + Paper

Commissioning MATISSE: operation and performances

Romain Petrov, Fatmé Allouche, Alexis Matter, Anthony Meilland, Stéphane Lagarde, Philippe Berio, Pierre Cruzalèbes, Florentin Millour, Sylvie Robbe-Dubois, Walter Jaffe, Karl-Heinz Hofmann, Jozsef Varga, Dieter Schertl, Leonard Burtscher, Klaus Meisenheimer, Alain Chelli, Gerard Zins, Julien Woillez, Markus Schöller, Bruno Lopez

Proceedings Volume 11446, 114460L (2020) https://doi.org/10.1117/12.2562569

KEYWORDS: Interferometry, Visibility, Sensors, Phase shift keying, Spatial filters, Telescopes, Modulation, Phase measurement, K band, Physics

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Proceedings Article | 16 December 2020 Presentation + Paper

Presentation + Paper

The ExoGRAVITY project: using single mode interferometry to characterize exoplanets

S. Lacour, J. Wang, M. Nowak, L. Pueyo, F. Eisenhauer, A.-M. Lagrange, P. Mollière, R. Abuter, A. Amorin, R. Asensio-Torres, M. Bauböck, M. Benisty, J. P. Berger, H. Beust, S. Blunt, A. Boccaletti, A. Bohn, M. Bonnefoy, H. Bonnet, W. Brandner, F. Cantalloube, P. Caselli, B. Charnay, G. Chauvin, E. Choquet, V. Christiaens, Y. Clénet, A. Cridland, P. T. de Zeeuw, R. Dembet, J. Dexter, A. Drescher, G. Duvert, F. Gao, P. Garcia, R. Garcia Lopez, T. Gardner, E. Gendron, R. Genzel, S. Gillessen, J. H. Girard, X. Haubois, G. Heißel, T. Henning, S. Hinkley, S. Hippler, M. Horrobin, M. Houllé, Z. Hubert, A. Jiménez-Rosales, L. Jocou, J. Kammerer, M. Keppler, P. Kervella, L. Kreidberg, V. Lapeyrère, J.-B. Le Bouquin, P. Léna, D. Lutz, A.-L. Maire, A. Mérand, J. D. Monnier, D. Mouillet, A. Muller, E. Nasedkin, T. Ott, G. P. P. L. Otten, C. Paladini, T. Paumard, K. Perraut, G. Perrin, O. Pfuhl, J. Rameau, L. Rodet, G. Rodriguez-Coira, G. Rousset, J. Shangguan, T. Shimizu, J. Stadler, O. Straub, C. Straubmeier, E. Sturm, T. Stolker, E. van Dishoeck, A. Vigan, F. Vincent, S. D. von Fellenberg, K. Ward-Duong, F. Widmann, E. Wieprecht, E. Wiezorrek, J. Woillez

Proceedings Volume 11446, 114460O (2020) https://doi.org/10.1117/12.2561667

KEYWORDS: Interferometry, Exoplanets

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Proceedings Article | 14 December 2020 Poster + Paper

Poster + Paper

Dimensioning adaptive optics for future VLTI projects

Fabien Patru, Florentin Millour, Olivier Lai, Marcel Carbillet, Frank Eisenhauer, Stefan Gillessen, Maximilian Haase, Michael Hartl, Frank Haussmann, Jean-Baptiste Le Bouquin, Dieter Lutz, Christopher Mandla, Nikhil More, Thomas Ott, Thibaut Paumard, Christian Rau, Josef Schubert, Ekkehard Wieprecht, Julien Woillez, Senol Yazici

Proceedings Volume 11448, 1144871 (2020) https://doi.org/10.1117/12.2562433

KEYWORDS: Adaptive optics, Wavefront sensors, Numerical simulations

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Proceedings Article | 13 December 2020 Paper

Paper

Review and scientific prospects of high-contrast optical stellar interferometry

D. Defrère, O. Absil, J.-P. Berger, W. C. Danchi, C. Dandumont, F. Eisenhauer, S. Ertel, T. Gardner, A. Glauser, P. Hinz, M. Ireland, J. Kammerer, S. Kraus, L. Labadie, S. Lacour, R. Laugier, J. Loicq, G. Martin, F. Martinache, M. A. Martinod, B. Mennesson, J. Monnier, B. Norris, M. Nowak, J. U. Pott, S. Quanz, E. Serabyn, J. Stone, P. Tuthill, J. Woillez

Proceedings Volume 11446, 114461J (2020) https://doi.org/10.1117/12.2561505

KEYWORDS: Stellar interferometry, Interferometry, Nulling interferometry, Data acquisition, Stars, Adaptive optics, Integrated optics, Calibration, Large telescopes

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Proceedings Article | 13 December 2020 Poster + Presentation

Poster + Presentation

Infrared wavefront sensing for adaptive optics assisted galactic center observations with GRAVITY

Stefan Hippler, Wolfgang Brandner, Silvia Scheithauer, Martin Kulas, Johana Panduro, Peter Bizenberger, Henri Bonnet, Casey Deen, Françoise Delplancke-Ströbele, Frank Eisenhauer, Gert Finger, Zoltan Hubert, Johann Kolb, Eric Müller, Laurent Pallanca, Julien Woillez, Gérard Zins

Proceedings Volume 11448, 114484K (2020) https://doi.org/10.1117/12.2560222

KEYWORDS: Adaptive optics, Wavefront sensors, Infrared radiation, Interferometers, Infrared sensors, Infrared telescopes, Telescopes, Sensors, Large telescopes, K band

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Proceedings Article | 13 December 2020 Presentation

Presentation

Static phase aberrations in near-IR interferometry and GRAVITY's determination of the galactic center distanceStatic phase aberrations in near-IR interferometry and GRAVITY's determination of the galactic center distance

Julia Stadler, Guy Perin, Wolfgang Brandner, Christian Straubmeier, Karine Rousselet-Perraut, António Amorim, Paulo Garcia, Frank Eisenhauer, Michael Bauböck, Feng Gao, Reinhard Genzel, Stefan Gillessen, Alejandra Jimenez-Rosales, Thomas Ott, Jinyi Shangguan, Odèle Straub, Eckhard Sturm, Sebastiano von Fellenberg, Felix Widmann, Oliver Pfuhl, Sylvestre Lacour, Julien Woillez, Mathias Nowak

Proceedings Volume 11446, 114460M (2020) https://doi.org/10.1117/12.2576225

KEYWORDS: Interferometry, Visibility, Phase measurement, Calibration, Zernike polynomials, Superposition, Phase interferometry, Integrated optics, Control systems

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

VLTI status update: tapping into a powerful second-generation instrumentation

Xavier Haubois, Roberto Abuter, Emmanuel Aller-Carpentier, Jaime Alonso, Juan Beltran, Jean-Philippe Berger, Pierre Bourget, Paul Bristow, Luis Caniguante, Bruno Chazelas, Claudia Cid, Ralf Conzelmann, Angela Cortes, Pascaline Darré, Alain Delboulbé, Françoise Delplancke-Ströbele, Diego Del Valle, Roderick Dembet, Reinaldo Donoso, Christophe Dupuy, Sebastien Egner, Frank Eisenhauer, Lorena Faundez, Eloy Fuenteseca, Robert Frahm, Daniel Gaytan, Juan Pablo Gil, Andreas Glindemann, Frédéric Gonté, Jaime Gonzales, Patricia Guajardo, Thibaut Guerlet, Sylvain Guieu, Pablo Gutierrez, Pierre Haguenauer, Pierre van der Heyden, Stefan Huber, Norbert Hubin, Christian Hummel, Lieselotte Jochum, Laurent Jocou, Jean-Paul Kirchbauer, Johann Kolb, Johan Kosmalski, Peter Krempl, Sylvestre Lacour, Jean-Baptiste Le Bouquin, Julien Leclercq, Jean Louis Lizon, Bruno Lopez, Yves Magnard, Anthony Meilland, Alexander Meister, Antoine Mérand, Steffen Mieske, Thibaut Moulin, Juan Osorio, Jürgen Ott, Claudia Paladini, Laurent Pallanca, Marcus Pavez, Luca Pasquini, Célia Pelluet, Isabelle Percheron, Lorenzo Pettazzi, Andrés Pino, Sébastien Poupar, Andrés Ramírez, Javier Reyes, Miguel Riquelme, Thomas Rivinius, Sylvain Rochat, Fernando Salgado, Markus Schöller, Nicolas Schuhler, Pavel Shchekaturov, Christian Stephan, Marcos Suarez, Alain Smette, Richard Tamblay, Mario Tapia, Konrad Tristram, Guillermo Valdes, Christophe Verinaud, Markus Wittkowski, Julien Woillez, Gérard Zins

Proceedings Volume 11446, 1144606 (2020) https://doi.org/10.1117/12.2561486

KEYWORDS: Telescopes, Adaptive optics, Space operations

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

Testing P-REx on VLTI data

Saavidra Perera, Jörg-Uwe Pott, Jullien Woillez, Martin Kulas, Wolfgang Brandner, Sylvestre Lacour, Felix Widmann, Steve Ertel, Amali Vaz

Proceedings Volume 11446, 114460J (2020) https://doi.org/10.1117/12.2560105

KEYWORDS: Interferometers, Adaptive optics, Telescopes, Atmospheric optics, Interferometry, Atmospheric turbulence, Sensors, Optical aberrations, Wind measurement, Velocity measurements

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Proceedings Article | 13 December 2020 Presentation

Presentation

First four telescopes large-separation off-axis fringe-tracking interferometry with GRAVITY at the VLTI

Feng Gao, Frank Eisenhauer, Julien Woillez, Pierre Bourget, Bruno Chazelas, Roderick Dembet, Frédéric Gonté, Jürgen Ott, Nicolas Schuhler, Gérard Zins, Frank Haussmann, Michael Hartl, Stefan Gillessen, Reinhard Genzel, Guy Perrin, Wolfgang Brandner, Thibaut Paumard, Karine Perraut, Paulo J. Garcia, Christian Straubmeier, António Amorim, Thomas Ott, Felix Widmann, Jinyi Shangguan, Odèle Straub, Sebastiano von Fellenberg, Eckhard Sturm, Oliver Pfuhl, Michi Bauboeck, Alejandra Jimenez-Rosales, Matthew Horrobin, Julia Stadler, Dieter Lutz, Taro Shimizu, Antonia Drescher, Mari Lena Bolzer

Proceedings Volume 11446, 114461I (2020) https://doi.org/10.1117/12.2561408

KEYWORDS: Telescopes, Interferometry, Interferometers, Atmospheric turbulence, Optical interferometry, Large telescopes, Stars

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Proceedings Article | 21 August 2020 Paper

Paper

Betelgeuse scope: single-mode-fibers-assisted optical interferometer design for dedicated stellar activity monitoring

Narsireddy Anugu, Katie Morzinski, Josh Eisner, Ewan Douglas, Dan Marrone, Steve Ertel, Sebastiaan Haffert, Oscar Montoya, Jordan Stone, Stefan Kraus, John Monnier, Jean-Baptiste Lebouquin, Jean-Philippe Berger, Julien Woillez, Miguel Montargès

Proceedings Volume 11490, 114900X (2020) https://doi.org/10.1117/12.2568900

KEYWORDS: Telescopes, Convection, Stars, Interferometers, Visibility, Interferometry, Optical telescopes, Single mode fibers, Spatial resolution

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Proceedings Article | 17 July 2018 Paper

Paper

Characterization of ALPAO deformable mirrors for the NAOMI VLTI Auxiliary Telescopes adaptive optics

Jean-Baptiste Le Bouquin, Jean-Philippe Berger, Jean-Luc Beuzit, Eric Cottalorda, Alain Delboulbe, Sebastien Egner, Frederic Yves Gonte, Sylvain Guieu, Pierre Haguenauer, Laurent Jocou, Yves Magnard, Thibaut Moulin, Sylvain Rochat, Christophe Vérinaud, Julien Woillez

Proceedings Volume 10703, 1070371 (2018) https://doi.org/10.1117/12.2313442

KEYWORDS: Actuators, Telescopes, Calibration, Deformable mirrors, Adaptive optics, Wavefronts, Astronomy, Turbulence, Interferometers

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Proceedings Article | 10 July 2018 Presentation

Presentation

Data reduction of the VLTI/GRAVITY interferometric instrument (Conference Presentation)

Vincent Lapeyrère, Pierre Kervella, Jean-Baptiste Le Bouquin, Sylvestre Lacour, Cesar Enrique Garcia-Dabó, Antoine Mérand, Julien Woillez, Guy Perrin, Frank Eisenhauer, Karine Perraut, Christian Straubmeier, António Amorim, Wolfgang Brandner

Proceedings Volume 10701, 107011F (2018) https://doi.org/10.1117/12.2314239

KEYWORDS: Interferometry, Fourier transforms, Information operations, Phase measurement, Algorithm development, Software development, Telescopes, Interferometers, Integrated optics, Signal processing

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Proceedings Article | 9 July 2018 Presentation + Paper

Presentation + Paper

Image-plane fringe tracker for adaptive-optics assisted long baseline interferometry

Michael Ireland, Denis Defrère, Frantz Martinache, John Monnier, Barnaby Norris, Peter Tuthill, Julien Woillez

Proceedings Volume 10701, 1070111 (2018) https://doi.org/10.1117/12.2314393

KEYWORDS: Adaptive optics, Telescopes, Wavefront sensors, Sensors, Visibility, Interferometry

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Proceedings Article | 9 July 2018 Paper

Paper

Hi-5: a potential high-contrast thermal near-infrared imager for the VLTI

D. Defrère, M. Ireland, O. Absil, J.-P. Berger, W. Danchi, S. Ertel, A. Gallenne, F. Hénault, P. Hinz, E. Huby, S. Kraus, L. Labadie, J.-B. Le Bouquin, G. Martin, A. Matter, B. Mennesson, A. Mérand, S. Minardi, J. Monnier, B. Norris, G. Orban de Xivry, E. Pedretti, J.-U. Pott, M. Reggiani, E. Serabyn, J. Surdej, K. R. W. Tristram, J. Woillez

Proceedings Volume 10701, 107010U (2018) https://doi.org/10.1117/12.2313700

KEYWORDS: Planets, Interferometry, Stars, Exoplanets, Imaging systems, Interferometers, L band, Mid-IR, Integrated optics, Astrophysics

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Proceedings Article | 9 July 2018 Paper

Paper

MATISSE: performance in laboratory, results of AIV in Paranal, and first results on sky

S. Robbe-Dubois, S. Lagarde, P. Antonelli, B. Lopez, F. Allouche, C. Bailet, Ph. Berio, Y. Bresson, J.-M. Clausse, P. Cruzalèbes, Y. Fantei-Caujolle, A. Marcotto, A. Matter, A. Meilland, F. Millour, S. Morel, R. Petrov, S. Rousseau, A. Soulain, G. Zins, M. Lehmitz, W. Laun, T. Adler, R. Klein, T. Maurer, F. Bettonvil, E. Eldswick, U. Beckmann, M. Heininger, P. Bristow, A. Glindemann, N. Hubin, L. Jochum, Th. Rivinus, M. Schoeller, J. Beltran, P. Bourget, A. Gallenne, Th. Guerlet, X. Haubois, D. Ives, G. Jakob, A. Meister, M. Riquelme, N. Schuhler, C. Stephan, P. Toledo, K. Tristam, J. Woillez, U. Neumann, A. Chelli, F. Guitton, K. Meisenheimer, B. Pichon, A. Spang, J. Varga, Th. Henning, W. Jaffe, L. Pasquini, Ph. Stee, G. Weigelt

Proceedings Volume 10701, 107010H (2018) https://doi.org/10.1117/12.2313270

KEYWORDS: L band, Photovoltaics, Spectral resolution, Visibility, Sensors, Interferometry, Astatine, Spatial filters, Telescopes, Calibration

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MATISSE (Multi AperTure mid-Infrared SpectroScopic Experiment) is the spectro-interferometer for the VLTI of the European Southern Observatory (ESO), operating in the L-, M- and N- spectral bands, and combining up to four beams from the unit or the auxiliary telescopes (UTs or ATs). MATISSE will offer new breakthroughs in the study of circumstellar environments by allowing the mapping of the material distribution, the gas and essentially the dust. The instrument consists in a warm optical system (WOP) accepting four beams from the VLTI and relaying them after a spectral splitting to cold optical benches (COB) located in two separate cryostats, one in L-M- band, and one in N-band. The test plan of the complete instrument has been conducted at the Observatoire de la Côte d’Azur in order to confirm the compliance of the performance with the high-level requirements. MATISSE has successfully passed the Preliminary Acceptance in Europe the 12th September 2017. Following this result, ESO gave approval for the instrument to be shipped to Paranal. The Alignment, Integration and Verification phase was conducted until end of February 2018, at the end of which first observations on sky have been performed to test the operations with the VLTI and to obtain first stellar light. The two first runs of the commissioning followed, respectively in March and in May 2018. It has the goal to optimize the MATISSE-VLTI communication, the acquisition procedures and the interface parameters. The observations were performed on bright L-M- and N- stars, with four ATs located on short baselines and UTs. The limit magnitudes will be deduced.

This paper reports on the performance of the instrument measured in laboratory (results of test plan in Nice and AIV in Paranal) in terms of spectral coverage, dispersion laws and spectral resolutions, and transfer function analysis: instrumental contrast, visibility accuracy, accuracy of the differential phase, of the closure-phase and of the differential visibility. It also provides results of the first tests on sky and the planning of the on-going commissioning.

Proceedings Article | 9 July 2018 Paper

Paper

NAOMI: the adaptive optics for the auxiliary telescopes of VLTI

Frédéric Gonté, Sebastien Egner, Pierre Haguenauer, Julien Woillez, Emmanuel Aller-Carpentier, Jaime Alonso, Luigi Andolfato, Pierre Bourget, Pascaline Darré, Roderick Dembet, Christophe Dupuy, Pablo Gutierrez, Stefan Huber, Norbert Hubin, Jean-Paul Kirchbauer, Johann Kolb, Johan Kosmalski, Alexander Meister, Luca Pasquini, Javier Reyes, Pavel Shchekaturov, Nicolas Schuhler, Christian Stephan, Guillermo Valdes, Christophe Vérinaud, Jean-Philippe Berger, Jean-Baptiste Le Bouquin, Sylvain Guieu, Alain Delboulbé, Laurent Jocou, Yves Magnard, Thibaut Moulin, Sylvain Rochat, Eric Stadler, Peter Krempl

Proceedings Volume 10701, 107010N (2018) https://doi.org/10.1117/12.2312220

KEYWORDS: Telescopes, Adaptive optics, Real-time computing, Deformable mirrors, Interferometry, Interferometers, Sensors, Mirrors, Wavefronts

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Proceedings Article | 9 July 2018 Paper

Paper

VLTI status update: three years into the second generation

Julien Woillez, Pascaline Darré, Sebastien Egner, Frédéric Gonté, Xavier Haubois, Antoine Mérand, Nicolas Schuhler, José Antonio Abad, Roberto Abuter, Emmanuel Aller-Carpentier, Jaime Alonso, Luigi Andolfato, Pablo José Barriga, Juan Beltran, Jean-Philippe Berger, Pierre Bourget, Roland Brast, Paul Bristow, Luis Caniguante, Ralf Conzelmann, Angela Cortes, Alain Delboulbé, Françoise Delplancke-Ströbele, Diego Del Valle, Roderick Dembet, Frédéric Derie, Reinaldo Donoso, Philippe Duhoux, Christophe Dupuy, Andreas Förster, Eloy Fuenteseca, Robert Frahm, Daniel Gaytan, Andreas Glindemann, Jaime Gonzales, Thibaut Guerlet, Sylvain Guieu, Stéphane Guisard, Pablo Gutierrez, Pierre Haguenauer, Andreas Haimerl, Pierre van der Heyden, Stefan Huber, Norbert Hubin, Lieselotte Jochum, Laurent Jocou, Paul Jolley, Jean-Paul Kirchbauer, Johann Kolb, Johan Kosmalski, Peter Krempl, Jean-Baptiste Le Bouquin, Samuel Lévêque, Paul Lilley, Jean Louis Lizon, Yves Magnard, Pedro Mardones, Alexander Meister, Thibaut Moulin, Juan Osorio, Jürgen Ott, Laurent Pallanca, Jérôme Paufique, Marcus Pavez, Luca Pasquini, Isabelle Percheron, Lorenzo Pettazzi, Thanh Phan Duc, Jean Francois Pirard, Andres Pino, Sébastien Poupar, Jutta Quentin, Andres Ramírez, Javier Reyes, Robert Ridings, Sylvain Rochat, Thomas Rivinius, Fernando Salgado, Markus Schöller, Pavel Shchekaturov, Christian Stephan, Marcos Suarez, Richard Tamblay, Mario Tapia, Konrad Tristram, Guillermo Valdes, Christophe Verinaud, Willem-Jan de Wit, Gérard Zins

Proceedings Volume 10701, 1070103 (2018) https://doi.org/10.1117/12.2312042

KEYWORDS: Telescopes, Adaptive optics, Metrology, Interferometers, Stars

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Proceedings Article | 6 July 2018 Presentation + Paper

Presentation + Paper

SAGE: using CubeSats for gravitational wave detection

S. Lacour, M. Nowak, P. Bourget, F. Vincent, A. Kellerer, V. Lapeyrère, L. David, A. Le Tiec, O. Straub, J. Woillez

Proceedings Volume 10699, 106992R (2018) https://doi.org/10.1117/12.2313639

KEYWORDS: Space operations, Satellites, Photons, Telescopes, Space telescopes, Interferometers, Diffraction, Solar processes, Metrology

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Proceedings Article | 4 August 2016 Paper

Paper

VLT interferometer upgrade for the 2nd generation of interferometric instruments

Frederic Gonté, Julien Woillez, Nicolas Schuhler, Sebastian Egner, Antoine Merand, José Antonio Abad, Sergio Abadie, Roberto Abuter, Margarita Acuña, Fatmé Allouche, Jaime Alonso, Luigi Andolfalto, Pierre Antonelli, Gerardo Avila, Pablo José Barriga, Juan Beltran, Jean-Philippe Berger, Carlos Bolados, Henri Bonnet, Pierre Bourget, Roland Brast, Paul Bristow, Luis Caniguante, Roberto Castillo, Ralf Conzelmann, Angela Cortes, Françoise Delplancke, Diego Del Valle, Frederic Derie, Alvaro Diaz, Reinaldo Donoso, Reinhold Dorn, Philippe Duhoux, Christophe Dupuy, Frank Eisenhauer, Christian Elao, Eloy Fuenteseca, Ruben Fernandez, Daniel Gaytan, Andreas Glindemann, Jaime Gonzales, Sylvain Guieu, Stephane Guisard, Pierre Haguenauer, Andreas Haimerl, Volker Heinz, Juan Pablo Henriquez, P. van der Heyden, Norbert Hubin, Rodrigo Huerta, Lieselotte Jochum, Alfredo Leiva, Samuel Lévêque, Jean-Louis Lizon, Fernando Luco, Pedro Mardones, Angel Mellado, Juan Osorio, Jürgen Ott, Laurent Pallanca, Marcus Pavez, Luca Pasquini, Isabelle Percheron, Jean-Francois Pirard, Duc Than Phan, Juan Carlos Pineda, Andres Pino, Sebastien Poupar, Andres Ramírez, Claudio Reinero, Miguel Riquelme, Juan Romero, Thomas Rivinius, Chester Rojas, Felix Rozas, Fernando Salgado, Silvia Scheithauer, Christian Schmid, Markus Schöller, Waldo Siclari, Christian Stephan, Richard Tamblay, Mario Tapia, Konrad Tristram, Guillermo Valdes, Willem-Jan de Wit, Andrew Wright, Gerard Zins

Proceedings Volume 9907, 99071Z (2016) https://doi.org/10.1117/12.2233350

KEYWORDS: Interferometry, Adaptive optics, Telescopes, Interferometers, Stars, Infrared radiation, Interferometry, Astatine, Mirrors, Mid-IR, Sensors

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Proceedings Article | 4 August 2016 Paper

Paper

Control bandwidth improvements in GRAVITY fringe tracker by switching to a synchronous real time computer architecture

Roberto Abuter, Roderick Dembet, Sylvestre Lacour, Nicola di Lieto, Julien Woillez, Frank Eisenhauer, Pierre Fedou, Than Phan Duc

Proceedings Volume 9907, 990721 (2016) https://doi.org/10.1117/12.2232019

KEYWORDS: Computer architecture, Switching, Computing systems, Computing systems, Sensors, Control systems, Reflectivity, Computer architecture, Actuators, Standards development, Real-time computing, Solar concentrators

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The new VLTI (Very Large Telescope Interferometer) 1 instrument GRAVITY^{5, 22, 23} is equipped with a fringe tracker¹⁶ able to stabilize the K-band fringes on six baselines at the same time. It has been designed to achieve a performance for average seeing conditions of a residual OPD (Optical Path Difference) lower than ~300 nm with objects brighter than K = 10. The control loop implementing the tracking is composed of a four stage real time computer system compromising: a sensor where the detector pixels are read in and the OPD and GD (Group Delay) are calculated; a controller receiving the computed sensor quantities and producing commands for the piezo actuators; a concentrator which combines both the OPD commands with the real time tip/tilt corrections offloading them to the piezo actuator; and finally a Kalman¹⁵ parameter estimator. This last stage is used to monitor current measurements over a window of few seconds and estimate new values for the main Kalman¹⁵ control loop parameters. The hardware and software implementation of this design runs asynchronously and communicates the four computers for data transfer via the Reflective Memory Network³. With the purpose of improving the performance of the GRAVITY^{5, 23} fringe tracking^{16, 22} control loop, a deviation from the standard asynchronous communication mechanism has been proposed and implemented. This new scheme operates the four independent real time computers involved in the tracking loop synchronously using the Reflective Memory Interrupts² as the coordination signal. This synchronous mechanism had the effect of reducing the total pure delay of the loop from ~3.5 [ms] to ~2.0 [ms] which then translates on a better stabilization of the fringes as the bandwidth of the system is substantially improved. This paper will explain in detail the real time architecture of the fringe tracker in both is synchronous and synchronous implementation. The achieved improvements on reducing the delay via this mechanism will be quantified.

Proceedings Article | 4 August 2016 Paper

Paper

Status of the Planet Formation Imager (PFI) concept

Michael Ireland, John Monnier, Stefan Kraus, Andrea Isella, Stefano Minardi, Romain Petrov, Theo ten Brummelaar, John Young, Gautam Vasisht, David Mozurkewich, Stephen Rinehart, Ernest Michael, Gerard van Belle, Julien Woillez

Proceedings Volume 9907, 99071L (2016) https://doi.org/10.1117/12.2233926

KEYWORDS: Planets, Imaging systems, Telescopes, Signal to noise ratio, Heterodyning, Optical instrument design, Space telescopes, Stars, Optical spheres, Adaptive optics

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Proceedings Article | 4 August 2016 Paper

Paper

NAOMI: a low-order adaptive optics system for the VLT interferometer

Frédéric Yves Gonté, Jaime Alonso, Emmanuel Aller-Carpentier, Luigi Andolfato, Jean-Philippe Berger, Angela Cortes, Françoise Delplancke-Strobele, Rob Donaldson, Reinhold Dorn, Christophe Dupuy, Sebastian Egner, Stefan Huber, Norbert Hubin, Jean-Paul Kirchbauer, Miska Le Louarn, Paul Lilley, Paul Jolley, Alessandro Martis, Jérôme Paufique, Luca Pasquini, Jutta Quentin, Robert Ridings, Javier Reyes, Pavel Shchkaturov, Marcos Suarez, Thanh Phan Duc, Guillermo Valdes, Julien Woillez, Jean-Baptiste Le Bouquin, Jean-Luc Beuzit, Sylvain Rochat, Christophe Vérinaud, Thibaut Moulin, Alain Delboulbé, Laurence Michaud, Jean-Jacques Correia, Alain Roux, Didier Maurel, Eric Stadler, Yves Magnard

Proceedings Volume 9907, 990720 (2016) https://doi.org/10.1117/12.2233993

KEYWORDS: Interferometry, Adaptive optics, Telescopes, Mirrors, Astatine, Relays, Actuators, Stars, Real-time computing, Deformable mirrors

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Proceedings Article | 4 August 2016 Paper

Paper

The 2nd generation VLTI path to performance

Julien Woillez, Jaime Alonso, Jean-Philippe Berger, Henri Bonnet, Willem-Jan de Wit, Sebastian Egner, Frank Eisenhauer, Frédéric Gonté, Sylvain Guieu, Pierre Haguenauer, Antoine Mérand, Lorenzo Pettazzi, Sébastien Poupar, Markus Schöller, Nicolas Schuhler

Proceedings Volume 9907, 990706 (2016) https://doi.org/10.1117/12.2233971

KEYWORDS: Telescopes, Wavefront sensors, Adaptive optics, Optical tracking, Stars, Infrared radiation, Interferometers, Astatine, Mirrors, Infrared telescopes

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Proceedings Article | 4 August 2016 Paper

Paper

An overview of the mid-infrared spectro-interferometer MATISSE: science, concept, and current status

A. Matter, B. Lopez, P. Antonelli, M. Lehmitz, F. Bettonvil, U. Beckmann, S. Lagarde, W. Jaffe, R. Petrov, P. Berio, F. Millour, S. Robbe-Dubois, A. Glindemann, P. Bristow, M. Schoeller, T. Lanz, T. Henning, G. Weigelt, M. Heininger, S. Morel, P. Cruzalebes, K. Meisenheimer, R. Hofferbert, S. Wolf, Y. Bresson, T. Agocs, F. Allouche, J.-C. Augereau, G. Avila, C. Bailet, J. Behrend, G. van Belle, J.-P. Berger, R. van Boekel, P. Bourget, R. Brast, J.-M. Clausse, C. Connot, R. Conzelmann, G. Csepany, W. Danchi, M. Delbo, C. Dominik, A. van Duin, E. Elswijk, Y. Fantei, G. Finger, A. Gabasch, F. Gonté, U. Graser, F. Guitton, S. Guniat, M. De Haan, P. Haguenauer, H. Hanenburg, K.-H. Hofmann, M. Hogerheijde, R. ter Horst, J. Hron, C Hummel, J. Isderda, D. Ives, G. Jakob, A. Jasko, P. Jolley, S. Kiraly, J. Kragt, T. Kroener, G. Kroes, S. Kuindersma, L. Labadie, W. Laun, C. Leinert, J.-L. Lizon, C. Lucuix, A. Marcotto, F. Martinache, G. Martinot-Lagarde, N. Mauclert, L. Mehrgan, A. Meilland, M. Mellein, S. Menardi, A. Merand, U. Neumann, E. Nussbaum, S. Ottogalli, R. Palsa, J. Panduro, E. Pantin, I. Percheron, T. Phan Duc, J.-U. Pott, E. Pozna, R. Roelfsema, G. Rupprecht, D. Schertl, C. Schmidt, M. Schuil, A. Spang, J. Stegmeier, N. Tromp, F. Vakili, M. Vannier, K. Wagner, L. Venema, J. Woillez

Proceedings Volume 9907, 99070A (2016) https://doi.org/10.1117/12.2233052

KEYWORDS: Mid-IR, Interferometry, Telescopes, Signal detection, Sensors, Stars, Spectral resolution, Fourier transforms, L band, Cameras

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Proceedings Article | 27 July 2016 Paper

Paper

Rejuvenation of a ten-year old AO curvature sensor: combining obsolescence correction and performance upgrade of MACAO

P. Haguenauer, E. Fedrigo, L. Pettazzi, C. Reinero, F. Gonte, L. Pallanca, R. Frahm, J. Woillez, P. Lilley

Proceedings Volume 9909, 99092Y (2016) https://doi.org/10.1117/12.2230839

KEYWORDS: Adaptive optics, Wavefront sensors, Sensors, Wavefront sensors, Avalanche photodetectors, Real-time computing, Wavefronts, Stars, Observatories, Software development, Calibration

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Proceedings Article | 24 July 2014 Paper

Paper

VLTI status update: a decade of operations and beyond

Antoine Mérand, Roberto Abuter, Emmanuel Aller-Carpentier, Luigi Andolfato, Jaime Alonso, Jean-Philippe Berger, Guillaume Blanchard, Henri Boffin, Pierre Bourget, Paul Bristow, Claudia Cid, Willem-Jan de Wit, Diego del Valle, Françoise Delplancke-Ströbele, Frédéric Derie, Lorena Faundez, Steve Ertel, Rebekka Grellmann, Philippe Gitton, Andreas Glindemann, Patricia Guajardo, Sylvain Guieu, Stéphane Guisard, Serge Guniat, Pierre Haguenauer, Cristian Herrera, Christian Hummel, Carlos La Fuente, Marcelo Lopez, Pedro Mardones, Sébastien Morel, André Müller, Isabelle Percheron, Than Phan Duc, Andres Pino, Sébastien Poupar, Eszter Pozna, Andres Ramirez, Srihdaran Rengaswamy, Lionel Rivas, Thomas Rivinius, Alex Segovia, Christian Schmid, Markus Schöller, Nicolas Schuhler, Julien Woillez, Markus Wittkowski

Proceedings Volume 9146, 91460J (2014) https://doi.org/10.1117/12.2057150

KEYWORDS: Telescopes, Astatine, Interferometry, Observatories, Interferometers, Adaptive optics, Space telescopes, Stars, Large telescopes, Calibration

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Proceedings Article | 24 July 2014 Paper

Paper

Improving the astrometric performance of VLTI-PRIMA

J. Woillez, R. Abuter, L. Andolfato, J.-P. Berger, H. Bonnet, F. Delplancke, F. Derie, N. Di Lieto, S. Guniat, A. Mérand, T. Phan Duc, C. Schmid, N. Schuhler, T. Henning, R. Launhardt, F. Pepe, Didier Queloz, A. Quirrenbach, S. Reffert, J. Sahlmann, D. Segransan

Proceedings Volume 9146, 91461H (2014) https://doi.org/10.1117/12.2054723

KEYWORDS: Metrology, Space telescopes, Telescopes, Stars, Sensors, Mirrors, Polarization, Retroreflectors, Signal to noise ratio, Exoplanets

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Proceedings Article | 24 July 2014 Paper

Paper

NAOMI: a new adaptive optics module for interferometry

Emmanuel Aller-Carpentier, Reinhold Dorn, Francoise Delplancke-Stroebele, Jérome Paufique, Luigi Andolfato, Christophe Dupuy, Enrico Fedrigo, Philippe Gitton, Paul Jolley, Paul Lilley, Miska Le Louarn, Than Duc, Andrew Rakich, Javier Reyes, Robert Ridings, Julien Woillez, Enrico Marchetti, Marcos Suarez Valles, Christian Schmid, Norbert Hubin, Jean-Philippe Berger, Jutta Quentin, Bernard-Alexis Delabre, Stewart McLay, Luca Pasquini

Proceedings Volume 9146, 91461C (2014) https://doi.org/10.1117/12.2054730

KEYWORDS: Telescopes, Adaptive optics, Interferometry, Wavefront sensors, Astatine, Stars, Sensors, Mirrors, Cameras, Real-time computing

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Proceedings Article | 24 July 2014 Paper

Paper

The interferometric baselines and GRAVITY astrometric error budget

S. Lacour, F. Eisenhauer, S. Gillessen, O. Pfuhl, Y. Kok, G. Perrin, K. Rousselet-Perraut, C. Straubmeier, W. Brandner, A. Amorin, J. Woillez, H. Bonnet

Proceedings Volume 9146, 91462E (2014) https://doi.org/10.1117/12.2057366

KEYWORDS: Metrology, Telescopes, Interferometry, Stars, Interferometers, Space telescopes, Observatories, Optical testing, Mirrors, 3D metrology

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

MATISSE status report and science forecast

B. Lopez, S. Lagarde, W. Jaffe, R. Petrov, M. Schöller, P. Antonelli, U. Beckman, Ph. Bério, F. Bettonvil, U. Graser, F. Millour, S. Robbe-Dubois, L. Venema, S. Wolf, P. Bristow, A. Glindemann, J.-C. Gonzalez, Th. Lanz, T. Henning, G. Weigelt, T. Agócs, J.-C. Augereau, G. Ávila, C. Bailet, J. Behrend, J.-P. Berger, Roy von Boekel, S. Bonhomme, P. Bourget, R. Brast, Y. Bresson, J. Clausse, O. Chesneau, G. Csépány, C. Connot, A. Crida, W. Danchi, M. Delbo , F. Delplancke, C. Dominik, M. Dugué, E. Elswijk, Y. Fanteï, G. Finger, A. Gabasch, P. Girard, V. Girault, P. Gitton, A. Glazenborg, F. Gonté, F. Guitton, S. Guniat, M. De Haan, P. Haguenauer, H. Hanenburg, M. Heininger, K.-H. Hofmann, M. Hogerheijde, R. ter Horst, J. Hron, Y. Hughes, D. Ives, G. Jakob, A. Jaskó, P. Jolley, J. Kragt, R. Köhler, T. Kroener, G. Kroes, L. Labadie, W. Laun, M. Lehmitz, Ch. Leinert, J. Lizon, Ch. Lucuix, A. Marcotto, F. Martinache, A. Matter, G. Martinot-Lagarde, N. Mauclert, L. Mehrgan, A. Meilland, M. Mellein, S. Ménardi, J. Menut, K. Meisenheimer, S. Morel, L. Mosoni, R. Navarro, U. Neumann, E. Nussbaum, S. Ottogalli, R. Palsa, J. Panduro, E. Pantin, I. Percheron, T. Phan Duc, J.-U. Pott, Eszter Pozna, F. Przygodda, A. Richichi, F. Rigal, G. Rupprecht, D. Schertl, J. Stegmeier, L. Thiam, N. Tromp, M. Vannier, F. Vakili, G. van Belle, K. Wagner, J. Woillez

Proceedings Volume 9146, 91460M (2014) https://doi.org/10.1117/12.2056419

KEYWORDS: Interferometry, Sensors, Mid-IR, Stars, Telescopes, Visibility, Planets, Spectral resolution, Photometry, Fourier transforms

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

New method for path-length equalization of long single-mode fibers for interferometry

M. Anderson, J. Monnier, K. Ozdowy, J. Woillez, G. Perrin

Proceedings Volume 9146, 91461L (2014) https://doi.org/10.1117/12.2057289

KEYWORDS: Optical fibers, Fiber optics, Composites, Resistance, Interferometry, Temperature metrology, Copper, Interferometers, Fiber optics tests, Control systems

Read Abstract +

Proceedings Article | 22 July 2014 Paper

Paper

VLTI-UT vibrations effort and performances

Sébastien Poupar, Pierre Haguenauer, Jaime Alonso, Nicolas Schuhler, Juan-Pablo Henriquez, Jean-Philippe Berger, Pierre Bourget, Stephane Brillant, Roberto Castillo, Philippe Gitton, Frederic Gonte, Nicola Di Lieto, Jean-Louis Lizon, Antoine Merand, Julien Woillez

Proceedings Volume 9145, 91452M (2014) https://doi.org/10.1117/12.2055435

KEYWORDS: Telescopes, Mirrors, IRIS Consortium, Electronics, Interferometers, Infrared telescopes, Metrology, Sensors, Large telescopes, Infrared sensors

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

A software based de-rotation algorithm concept for the new adaptive optics module (NAOMI) for the auxiliary telescopes of the VLTI

Emmanuel Aller-Carpentier, Enrico Marchetti, Reinhold Dorn, Françoise Delplancke-Stroebele, Enrico Fedrigo, Miska Le Louarn, Norbert Hubin, Jérome Paufique, Julien Woillez

Proceedings Volume 9148, 91484A (2014) https://doi.org/10.1117/12.2055072

KEYWORDS: Calibration, Actuators, Adaptive optics, Telescopes, Zernike polynomials, Monte Carlo methods, Algorithm development, Astatine, Picosecond phenomena, Interferometry

Read Abstract +

Proceedings Article | 8 July 2014 Paper

Paper

Development and recent results from the Subaru coronagraphic extreme adaptive optics system

N. Jovanovic, O. Guyon, F. Martinache, C. Clergeon, G. Singh, T. Kudo, K. Newman, J. Kuhn, E. Serabyn, B. Norris, P. Tuthill, P. Stewart, E. Huby, G. Perrin, S. Lacour, S. Vievard, N. Murakami, O. Fumika, Y. Minowa, Y. Hayano, J. White, O. Lai, F. Marchis, G. Duchene, T. Kotani, J. Woillez

Proceedings Volume 9147, 91471Q (2014) https://doi.org/10.1117/12.2057249

KEYWORDS: Wavefront sensors, Point spread functions, Coronagraphy, Adaptive optics, Wavefronts, Speckle, Cameras, Deformable mirrors, Sensors, Imaging systems

Read Abstract +

Proceedings Article | 26 September 2013 Paper

Paper

Astrometric detection of exoplanets from the ground

J. Sahlmann, P. Lazorenko, A. Mérand, Didier Queloz, D. Ségransan, J. Woillez

Proceedings Volume 8864, 88641B (2013) https://doi.org/10.1117/12.2023929

KEYWORDS: Planets, Stars, Exoplanets, Telescopes, Interferometers, Space telescopes, Cameras, Exoplanetary science, Atmospheric optics, Motion measurement

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Paper

FIRST - a fibered aperture masking instrument: on-sky results

Elsa Huby, Guy Perrin, Franck Marchis, Sylvestre Lacour, Takayuki Kotani, Gaspard Duchêne, Elodie Choquet, Elinor Gates, Julien Woillez, Olivier Lai

Proceedings Volume 8446, 84461Z (2012) https://doi.org/10.1117/12.925615

KEYWORDS: Telescopes, Prototyping, Diffraction, Phase measurement, Adaptive optics, Observatories, Stars, Optical fibers, Speckle, Calibration

Read Abstract +

Proceedings Article | 12 September 2012 Paper

Paper

Keck Interferometer Nuller science highlights

Bertrand Mennesson, Rafael Millan-Gabet, M. Colavita, E. Serabyn, P. Hinz, M. Kuchner, W. Liu, R. Barry, C. Stark, S. Ragland, J. Woillez, W. Traub, O. Absil, Denis Defrère, J. C. Augereau, J. Lebreton

Proceedings Volume 8445, 844507 (2012) https://doi.org/10.1117/12.926548

KEYWORDS: Stars, Visibility, Mid-IR, Nulling interferometry, Silicates, Interferometry, Data modeling, Interferometers, Remote sensing, Exoplanets

Read Abstract +

Proceedings Article | 12 September 2012 Paper

Paper

First faint dual-field phase-referenced observations on the Keck interferometer

J. Woillez, P. Wizinowich, R Akeson, M . Colavita, J. Eisner, R. Millan-Gabet, J. Monnier, J.-U. Pott, S. Ragland, E. Appleby, A. Cooper, C. Felizardo, J. Herstein, O. Martin, D. Medeiros, D. Morrison, T. Panteleeva, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell

Proceedings Volume 8445, 84450E (2012) https://doi.org/10.1117/12.926404

KEYWORDS: Adaptive optics, Metrology, Stars, Mirrors, Interferometers, Infrared radiation, Beam splitters, Telescopes, Cameras, Optical tracking

Read Abstract +

Proceedings Article | 12 September 2012 Paper

Paper

Recent progress at the Keck interferometer

S. Ragland, R. Akeson, M. Colavita, R. Millan-Gabet, T. Pantaleeva, B. Smith, K. Summers, P. Wizinowich, J. Woillez, E. Appleby, A. Cooper, C. Felizardo, J. Herstein, D. Morrison, K. Tsubota, C. Tyau

Proceedings Volume 8445, 84450C (2012) https://doi.org/10.1117/12.925462

KEYWORDS: Stars, Interferometers, Nulling interferometry, Telescopes, L band, Adaptive optics, K band, Interferometry, Visibility, Mirrors

Read Abstract +

Proceedings Article | 22 July 2010 Open Access

Open Access

Paper

Science with the Keck Interferometer ASTRA program

J. Eisner, R. Akeson, M. Colavita, A. Ghez, J. Graham, L. Hillenbrand, R. Millan-Gabet, J. Monnier, J. Pott, S. Ragland, P. Wizinowich, J. Woillez

Proceedings Volume 7734, 773411 (2010) https://doi.org/10.1117/12.856418

KEYWORDS: Stars, Planets, Data modeling, Bromine, Interferometers, Phase measurement, Exoplanets, Interferometry, Hydrogen, Spatial resolution

Read Abstract +

Proceedings Article | 22 July 2010 Open Access

Open Access

Paper

First Keck Interferometer measurements in self-phase referencing mode: spatially resolving circum-stellar line emission of 48 Lib

J-U. Pott, J. Woillez, S. Ragland, P. Wizinowich, J. Eisner, J. Monnier, R. Akeson, A. Ghez, J. Graham, L. Hillenbrand, R. Millan-Gabet, E. Appleby, B. Berkey, M. Colavita, A. Cooper, C. Felizardo, J. Herstein, M. Hrynevych, D. Medeiros, D. Morrison, T. Panteleeva, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell

Proceedings Volume 7734, 77340P (2010) https://doi.org/10.1117/12.856922

KEYWORDS: Laser induced breakdown spectroscopy, Bromine, Stars, Interferometers, Calibration, Spectral resolution, Interferometry, Beryllium, Hydrogen, K band

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

Recent science highlights from the Keck Interferometer

R. Akeson, M. Colavita, R. Millan-Gabet, S. Ragland, P. Wizinowich, J. Woillez

Proceedings Volume 7734, 77340C (2010) https://doi.org/10.1117/12.856494

KEYWORDS: Stars, Interferometers, Calibration, K band, L band, Interferometry, Nulling interferometry, Visibility, Active galactic nuclei, Data modeling

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

Development of a high-dynamic range imaging instrument for a single telescope by a pupil remapping system

Takayuki Kotani, Sylvestre Lacour, Elodie Choquet, Elsa Huby, Guy Perrin, Pierre Fedou, Franck Marchis, Gaspard Duchene, Éric Thiébaut, Julien Woillez, Jean-Philippe Berger, Pascal Bordé, Olivier Chesneau, Pierre Kervella, Olivier Lai, Stephen Ridgway, Daniel Rouan, Alain Lecavelier des Etangs, Alfred Vidal-Madjar

Proceedings Volume 7734, 77343O (2010) https://doi.org/10.1117/12.856899

KEYWORDS: Telescopes, High dynamic range imaging, Imaging systems, Single mode fibers, Adaptive optics, Range imaging, Stars, Observatories, Space telescopes, Wavefronts

Read Abstract +

Proceedings Article | 22 July 2010 Open Access

Open Access

Paper

ASTRA: astrometry and phase-referencing astronomy on the Keck interferometer

J. Woillez, R. Akeson, M. Colavita, J. Eisner, A. Ghez, J. Graham, L. Hillenbrand, R. Millan-Gabet, J. Monnier, J-U. Pott, S. Ragland, P. Wizinowich, E. Appleby, B. Berkey, A. Cooper, C. Felizardo, J. Herstein, M. Hrynevych, O. Martin, D. Medeiros, D. Morrison, T. Panteleeva, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell

Proceedings Volume 7734, 773412 (2010) https://doi.org/10.1117/12.857740

KEYWORDS: Metrology, Adaptive optics, Mirrors, Space telescopes, Interferometers, Telescopes, Cameras, Astronomy, Electron beam melting, Infrared radiation

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

'OHANA-Iki: a test-bed for the 'OHANA beam combiner and delay line at CFHT

Marc Baril, Olivier Lai, George Zahariade, Flora Bouchacourt, Guy Perrin, Pierre Fedou, Julien Woillez

Proceedings Volume 7734, 77342C (2010) https://doi.org/10.1117/12.856219

KEYWORDS: Telescopes, Optical fibers, Mirrors, Interferometry, Stars, Gemini Observatory, Interferometers, Cameras, Servomechanisms, Astronomy

Read Abstract +

Proceedings Article | 16 July 2010 Paper

Paper

Recent progress at the Keck Interferometer

S. Ragland, R. Akeson, M. Colavita, R. Millan-Gabet, J. Woillez, P. Wizinowich, E. Appleby, B. Berkey, A. Cooper, C. Felizardo, J. Herstein, M. Hrynevych, D. Medeiros, D. Morrison, T. Panteleeva, J.-U. Pott, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell

Proceedings Volume 7734, 773402 (2010) https://doi.org/10.1117/12.857477

KEYWORDS: Nulling interferometry, L band, Interferometers, Cameras, Telescopes, Control systems, K band, Spectral resolution, Calibration, Nitrogen

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Keck Interferometer nuller update

M. M. Colavita, E. Serabyn, A. J. Booth, S. L. Crawford, J. I. Garcia-Gathright, E. R. Ligon, B. L. Mennesson, C. G. Paine, P. L. Wizinowich, S. Ragland, E. C. Appleby, B. C. Berkey, A. Cooper, W. Dahl, J. T. Gathright, M. A. Hrynevych, D. W. Medeiros, D. Morrison, T. Panteleeva, B. Smith, K. R. Summers, K. Tsubota, C. Tyau, E. Wetherell, J. M. Woillez, R. L. Akeson, R. Millan-Gabet, C. Felizardo, C. D. Koresko, J. S. Herstein

Proceedings Volume 7013, 70130A (2008) https://doi.org/10.1117/12.789476

KEYWORDS: Nulling interferometry, Signal to noise ratio, Interferometers, Cameras, Calibration, Stars, Telescopes, Phase shift keying, K band, Modulation

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Recent progress at the Keck Interferometer: operations and V2 science

S. Ragland, P. Wizinowich, R. Akeson, M. Colavita, E. Appleby, B. Berkey, A. Booth, A. Cooper, S. Crawford, W. Dahl, C. Felizardo, J. Garcia-Gathright, J. Herstein, M. Hrynevych, C. Koresko, R. Ligon, D. Medeiros, B. Mennesson, R. Millan-Gabet, D. Morrison, C. Paine, B. Parvin, T. Panteleeva, E. Serabyn, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell, J. Woillez

Proceedings Volume 7013, 70130B (2008) https://doi.org/10.1117/12.788070

KEYWORDS: Nulling interferometry, Stars, Cameras, Telescopes, Interferometers, Adaptive optics, Visibility, Mirrors, L band, Cryogenics

Read Abstract +

Proceedings Article | 28 July 2008 Open Access

Open Access

Paper

First spectro-interferometry on galactic center sources in the infrared: results and science prospects at the sensitivity limit of current larger aperture arrays

Jörg-Uwe Pott, Julien Woillez, Peter Wizinowich, Andreas Eckart, Andreas Glindemann, Andrea Ghez, James Graham

Proceedings Volume 7013, 701322 (2008) https://doi.org/10.1117/12.788245

KEYWORDS: Stars, Interferometry, Interferometers, Visibility, Telescopes, Spatial resolution, Near infrared, Infrared radiation, Spectral resolution, Cameras

Read Abstract +

Proceedings Article | 9 July 2008 Paper

Paper

The FIRST project: a single-mode fiber-based very high-dynamic range diffraction-limited imaging instrument at visible to near-infrared wavelengths

Takayuki Kotani, Guy Perrin, Sylvestre Lacour, Eric Thiébaut, Julien Woillez, Pierre Fedou, Jean-Philippe Berger, Pascal Bordé, Olivier Chesneau, Pierre Kervella, Olivier Lai, Alain Lecavelier, Stephen Ridgway, Daniel Rouan, Alfred Vidal-Madjar

Proceedings Volume 7014, 70141P (2008) https://doi.org/10.1117/12.789008

KEYWORDS: High dynamic range imaging, Range imaging, Telescopes, Astronomy, Point spread functions, Visibility, Diffraction, Imaging systems, Exoplanets, Prototyping

Read Abstract +

Proceedings Article | 29 June 2006 Paper

Paper

Keck interferometer beamline characterizations

Michael Hrynevych, Sam Ragland, Julien Woillez, M. Mark Colavita

Proceedings Volume 6268, 62683U (2006) https://doi.org/10.1117/12.672585

KEYWORDS: Polarization, Interferometers, Raster graphics, Telescopes, Adaptive optics, Mirrors, Polarizers, Nulling interferometry, Wavefronts, Calibration

Read Abstract +

Proceedings Article | 28 June 2006 Paper

Paper

Science observations with the Keck Interferometer Nuller

E. Serabyn, A. Booth, M. Colavita, S. Crawford, J. Garcia, J. Gathright, M. Hrynevych, C. Koresko, R. Ligon, B. Mennesson, T. Panteleeva, S. Ragland, K. Summers, W. Traub, K. Tsubota, E. Wetherell, P. Wizinowich, J. Woillez

Proceedings Volume 6268, 626815 (2006) https://doi.org/10.1117/12.672621

KEYWORDS: Nulling interferometry, Stars, Interferometers, Visibility, Remote sensing, Adaptive optics, Cameras, Keck Observatory, K band, Data modeling

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Paper

Recent progress at the Keck Interferometer

Peter Wizinowich, Rachel Akeson, Mark Colavita, John Gathright, Eric Appleby, Jim Bell, Ben Berkey, Andrew Booth, Heidi Brandenburg, Jason Chin, Wayne Dahl, Claude Felizardo, Jean Garcia, Scott Hartman, Jen Herstein, Michael Hrynevych, Chris Koresko, Robert Ligon, Rafael Millan-Gabet, Doug Morrison, Tatyana Panteleeva, Sam Ragland, Robert Smythe, Kellee Summers, Kevin Tsubota, Colette Tyau, Ed Wetherell, Julien Woillez

Proceedings Volume 6268, 62680N (2006) https://doi.org/10.1117/12.672069

KEYWORDS: Interferometers, Adaptive optics, Cameras, Mirrors, Telescopes, Nulling interferometry, Visibility, Data archive systems, Calibration, Stars

Read Abstract +

Proceedings Article | 15 September 2005 Paper

Paper

The Keck interferometer nuller (KIN): configuration, measurement approach, and first results

E. Serabyn, E. Appleby, J. Bell, A. Booth, J. Chin, M. Colavita, S. Crawford, M. Creech-Eakman, W. Dahl, J. Fanson, J. Garcia, J. Gathright, E. Hovland, M. Hrynevych, C. Koresko, R. Ligon, B. Mennesson, J. Moore, D. Palmer, T. Panteleeva, C. Paine, S. Ragland, L. Reder, T. Saloga, R. Smythe, C. Tyau, K. Tsubota, G. Vasisht, E. Wetherell, P. Wizinowich, J. Woillez

Proceedings Volume 5905, 59050T (2005) https://doi.org/10.1117/12.618228

KEYWORDS: Nulling interferometry, Metrology, Beam splitters, Near infrared, Cameras, Stars, Mirrors, Interferometers, K band, Keck Observatory

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

Aperture masking interferometry and single-mode fibers

Sylvestre Lacour, Guy Perrin, Julien Woillez, Francois Assemat, Eric Thiebault

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551746

KEYWORDS: Visibility, Single mode fibers, Interferometry, Optical fibers, Adaptive optics, Telescopes, Calibration, Wavefronts, Turbulence, Phase measurement

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

Tomography of active galactic nuclei broad line region: a science case for next-generation extremely long baseline optical interferometry

Julien Woillez, Hélène Sol, Guy Perrin, Olivier Lai

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551268

KEYWORDS: Interferometry, Interferometers, Tomography, Motion measurement, Spatial resolution, Active galactic nuclei, 3D modeling, Astronomical imaging, Bromine, Optical tomography

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

K band fibers for the 'OHANA project

Takayuki Kotani, Guy Perrin, Julien Woillez, Jean Guerin, Gwenael Maze

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551272

KEYWORDS: Optical fibers, Polarization, K band, Single mode fibers, Visibility, Glasses, Temperature metrology, Interferometers, Telescopes, Refractive index

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

'OHANA

Guy Perrin, Olivier Lai, Julien Woillez, Jean Guerin, Takayuki Kotani, Sebastien Vergnole, Andrew Adamson, Christ Ftaclas, Olivier Guyon, Pierre Lena, Jun Nishikawa, Francois Reynaud, Katherine Roth, Stephen Ridgway, Alan Tokunaga, Peter Wizinowich

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551585

KEYWORDS: Optical fibers, Telescopes, Interferometers, Single mode fibers, K band, Interferometry, Gemini Observatory, Space telescopes, Dispersion, Glasses

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

'OHANA phase I: adaptive optics and single mode fiber coupling

Julien Woillez, Guy Perrin, Jean Guerin, Olivier Lai, Francois Reynaud, Peter Wizinowich, Christopher Neyman, David Le Mignant, Katherine Roth, John White

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551326

KEYWORDS: Adaptive optics, Telescopes, Single mode fibers, Gemini Observatory, Interferometry, Keck Observatory, Phase interferometry, Interferometers, Multimode fibers, Observatories

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Injection into singlemode fibers for OHANA

Julien Woillez, Jean Guerin, Guy Perrin, Olivier Lai, Francois Reynaud, Claude Collin, Jean Cretenet, Claude Marlot, Sylvain Pau, Jean-Michel Reess, Denis Ziegler, Christophe Berthod, Bernard Brient

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459362

KEYWORDS: Adaptive optics, Telescopes, Single mode fibers, Interferometry, K band, Multimode fibers, Infrared telescopes, Astronomical telescopes, Head, Infrared detectors

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Extragalactic astronomy with the OHANA array

Julien Woillez, Helene Sol, Olivier Lai, Olivier Guyon, Guy Perrin

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.458072

KEYWORDS: Visibility, Interferometry, Interferometers, Distance measurement, Telescopes, Active galactic nuclei, Spatial resolution, Near infrared, Extragalactic astronomy, Astronomical imaging

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

OHANA: representative science objectives

Olivier Lai, Stephen Ridgway, Jean-Philippe Berger, Catherine Dougados, Vincent Coude du Foresto, Olivier Guyon, Regis Lachaume, Eugene Magnier, Fabien Malbet, Francois Menard, Denis Mourard, Guy Perrin, Helene Sol, Steve Warren, Julien Woillez

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459376

KEYWORDS: Stars, Interferometers, Telescopes, Visibility, Interferometry, K band, Signal to noise ratio, Light, Data modeling, Planets

Read Abstract +

In this poster, we examine the science potential of an 800 meter interferometer such as the OHANA Array. The working assumptions are a K = 12 limiting magnitude, a 0.5 milliarcsecond resolution at K band, and a small (diffraction limit of individual telescope) field of view. The science cases described herein are by no means exhaustive and perhaps not even the ones that will eventually be carried out, but serve to illustrate the potential of the array. We expect that operation of the array will be proposal driven, so the actual science will come from the Mauna Kea communities. Our philosophy is that any measurement that can be made at a dedicated interferometer facility should not be a strong driver for OHANA. Therefore the science areas discussed in the poster focus on very high angular resolution measurements of faint sources. In some cases, science which can be addressed with simpler or dedicated facilities at an exploratory level can be carried to a significant new capability with OHANA. A limitng magnitude of 12 was obtained by simple computations, but first tests on the sky with the injection module (See adjacent poster on Phase I) will help narrow down this figure. At such sensitivity, Cepheid pulsations can be studied in considerable detail for a wide range of stellar parameters, leading to enhanced confidence in the accuracy of their use for distance measurement with minimal extrapolation or inferrence. The disk/star interaction zone in young stellar objects can be resolved with unprecedented detail for a range of masses and ages, providing direct information about the jet formation region, accretion rates and disk conditions. The broad line region of active galactic nuclei can be studied in a large number of sources of differing characteristics, testing specific models for AGN nuclear structure. For OHANA Phase III, a dual-star phase tracking capability is planned. With the resulting increased sensitivity, direct brown dwarf diameter measurement will provide a strong check on evolution models. Microlensing events could be resolved and provide unique new information about the lensing and the lensed objects.

Proceedings Article | 21 February 2003 Paper

Paper

OHANA phase II: a prototype demonstrator of fiber-linked interferometry between very large telescopes

Guy Perrin, Olivier Lai, Julien Woillez, Jean Guerin, Francois Reynaud, Stephen Ridgway, Pierre Lena, Peter Wizinowich, Alan Tokunaga, Jun Nishikawa, Francois Rigaut, Andrew Adamson, Olivier Guyon

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459382

KEYWORDS: Telescopes, Interferometers, Astronomy, Single mode fibers, Space telescopes, Prototyping, Interferometry, Astronomical imaging, Gemini Observatory, Large telescopes

Read Abstract +

Proceedings Article | 21 February 2003 Paper

Paper

Optical delay for OHANA

Stephen Ridgway, Guy Perrin, Julien Woillez, Jean Guerin, Olivier Lai

Proceedings Volume 4838, (2003) https://doi.org/10.1117/12.459141

KEYWORDS: Polarization, Interferometry, Mirrors, Reflection, Optical fibers, Space telescopes, Telescopes, Silver, Wavefronts, Phase shifts

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Showing 5 of 89 publications

Conference Committee Involvement (1)

Optical and Infrared Interferometry III

1 July 2012 | Amsterdam, Netherlands

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