Prof. Paulo J. V. Garcia Profile

Prof. Paulo J. V. Garcia

Professor at Univ. do Porto

SPIE Involvement:

Author

Publications (42)

Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

Towards virtual access of adaptive optics telemetry data

Tiago Gomes, Carlos Correia, Lisa Bardou, Olivier Beltramo-Martin, Thierry Fusco, Caroline Kulcsár, Timothy Morris, Nuno Morujão, Benoît Neichel, James Osborn, Paulo Garcia

Proceedings Volume 12185, 121850H (2022) https://doi.org/10.1117/12.2630214

KEYWORDS: Adaptive optics, Data modeling, Wavefront sensors, Telescopes, Real-time computing, Sensors, Wavefronts, Matrices, Data archive systems, Control systems, Data conversion, Deformable mirrors, Point spread functions, Object oriented programming, Scientific programming

Read Abstract +

Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

A mass and vibration optimised solution for 6D precision heavy instrument alignment and its application to METIS

António Amorim, Mercedes Filho, Dirk Lesman, Frederico Carvalho, Ricardo Costa, Marcelino Ngando, Paulo Garcia

Proceedings Volume 12188, 121881A (2022) https://doi.org/10.1117/12.2629383

KEYWORDS: Telescopes, Interfaces, Actuators, Optical alignment, Earthquakes, Tolerancing, Spherical lenses, Prototyping, Optical instrument design, Optical components

Read Abstract +

Proceedings Article | 29 August 2022 Presentation + Paper

Presentation + Paper

Status update on the development of METIS, the mid-infrared ELT imager and spectrograph

Bernhard Brandl, Felix Bettonvil, Roy van Boekel, Adrian Glauser, Sascha Quanz, Olivier Absil, Markus Feldt, Paulo J. Garcia, Alistair Glasse, Manuel Guedel, Lucas Labadie, Michael Meyer, Eric Pantin, Shiang-Yu Wang, Hans van Winckel, Tibor Agócs, António Amorim, Thomas Bertram, Leonard Burtscher, Christian Delacroix, Werner Laun, Dirk Lesman, Gert Raskin, Chad Salo, Silvia Scheithauer, Remko Stuik, Stephen Todd, Christoph Haupt, Ralf Siebenmorgen

Proceedings Volume 12184, 1218421 (2022) https://doi.org/10.1117/12.2628331

KEYWORDS: Imaging systems, Coronagraphy, Adaptive optics, Imaging spectroscopy, Stars, Spectrographs, Sensors, Telescopes, Mirrors, Calibration

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

Poster + Paper

The METIS warm support structure final design

R. Costa, A. Amorim, A. Boné, M. Filho, F. Carvalho, M. Ngando, P. J. V. Garcia

Proceedings Volume 12184, 121843A (2022) https://doi.org/10.1117/12.2629379

KEYWORDS: Interfaces, Finite element methods, Computer aided design, Structural design, 3D modeling, Actuators, Solid modeling, Mechanical engineering, Laser optics, Earthquakes

Read Abstract +

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

Read Abstract +

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

Read Abstract +

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

Read Abstract +

Proceedings Article | 25 August 2022 Paper

Paper

Challenges to the assembly and integration of the WSS with METIS

M. Filho, A. Amorim, P. Garcia, F. Carvalho, R. da Costa, M. Ngando

Proceedings Volume 12187, 121871C (2022) https://doi.org/10.1117/12.2629390

KEYWORDS: Safety, Optical alignment, Mid-IR, Manufacturing, Adaptive optics, Spectrographs, Imaging systems, Earthquakes, Wavefronts, Wavefront sensors

Read Abstract +

SPIE Journal Paper | 5 April 2021

Methods for the development of an alignment platform for an astronomical instrument with application to the METIS instrument at the ELT

André Boné, António Amorim, Mercedes Filho, Paulo J. Garcia

JATIS, Vol. 7, Issue 02, 028001, (April 2021) https://doi.org/10.1117/12.10.1117/1.JATIS.7.2.028001

KEYWORDS: Astronomy, Actuators, Telescopes, Solid modeling, James Webb Space Telescope, Earthquakes, Mid-IR, Curium, Mirrors, Computer aided design

Read Abstract +

Proceedings Article | 15 January 2021 Poster + Paper

Poster + Paper

GRAVITY upgrade with high-performance grisms with factor >2 enhanced throughput

Senol Yazici, Takashi Sukegawa, Martin Mayer, Frank Eisenhauer, Yukinobu Okura, Karine Perraut, Laurent Jocou, Stefan Gillessen, Frank Haussmann, Alexander Buron, David Huber, Lothar Barl, Kateryna Kravchenko, Oliver Pfuhl, Sylvestre Lacour, Vincent Lapeyrere, Erich Wiezorrek, Thomas Ott, Thibaut Paumard, Jinyi Shangguan, Feng Gao, Christian Straubmeier, Patricia Guajardo, Miguel Riquelme, Laurent Pallanca, Reinhard Genzel, Tim de Zeeuw, Michael Bauböck, Maryam Habibi, Christian Rau, Alejandra Jimenez Rosales, Julia Stadler, Odele Straub, Eckhard Sturm, Sebastiano von Fellenberg, Felix Widmann, Ekkehard Wieprecht, Andreas Eckart, Guy Perrin, Antonio Amorim, Paolo Garcia, Wolfgang Brandner

Proceedings Volume 11446, 114461X (2021) https://doi.org/10.1117/12.2561387

KEYWORDS: Spectroscopy, Interferometry, Spectral resolution, Germanium, Phase interferometry, Image resolution, Zinc, Refractive index, Antireflective coatings, Optical properties

Read Abstract +

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

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

A mass optimized support and access structure for ESO's Mid-infrared E-ELT Imager and Spectrograph (METIS)

André Boné, António Amorim, Hener Rodrigues, Dirk Lesman, Mercedes Filho, Paulo Garcia

Proceedings Volume 11447, 114472W (2020) https://doi.org/10.1117/12.2562150

KEYWORDS: Human-computer interaction, Near field optics, Wavefronts, Spatial frequencies, Large telescopes, Mirrors, Telescopes, Diffraction, Imaging spectroscopy, Spectroscopes

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

Challenges to the assembly and integration of the WSS with METIS

M. Filho, A. Amorim, P. Garcia, A. Boné, H. Rodrigues, M. Ngando

Proceedings Volume 11450, 114502A (2020) https://doi.org/10.1117/12.2561398

KEYWORDS: Mid-IR, Large telescopes, Imaging systems, Spectrographs, Manufacturing, Aerospace engineering

Read Abstract +

Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

The ORP on-sky community access program for adaptive optics instrumentation development

T. Morris, J. Osborn, M. Reyes, I. Montilla, G. Rousset, E. Gendron, T. Fusco, B. Neichel, S. Esposito, P. J. Garcia, C. Kulcsar, C. Correia, J.-L. Beuzit, N. Bharmal, L. Bardou, L. Staykov, D. Bonaccini Calia

Proceedings Volume 11448, 114485H (2020) https://doi.org/10.1117/12.2562805

KEYWORDS: Adaptive optics, Telescopes, Optical testing, Observatories

Read Abstract +

Proceedings Article | 13 December 2020 Presentation

Presentation

Polarization analysis of GRAVITY and the VLTI

Felix Widmann, Frank Eisenhauer, Oliver Pfuhl, Nicolas Schuhler, Xavier Haubois, António Amorim, Michi Bauböck, Wolfgang Brandner, Jason Dexter, Feng Gao, Paulo J. Garcia, Reinhard Genzel, Stefan Gillessen, Alejandra Jimenez-Rosales, Sylvestre Lacour, Thomas Ott, Karine Perraut, Guy Perrin, Jinyi Shangguan, Odèle Straub, Christian Straubmeier, Eckhard Sturm, Sebastiano von Fellenberg

Proceedings Volume 11446, 114460S (2020) https://doi.org/10.1117/12.2559311

KEYWORDS: Polarization, Data modeling, Polarization analysis, Calibration, Signal attenuation, Birefringence, Polarimetry, Telescopes, Mirrors, Device simulation

Read Abstract +

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

Read Abstract +

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

Read Abstract +

Proceedings Article | 12 July 2018 Presentation + Paper

Presentation + Paper

Status of the mid-IR ELT imager and spectrograph (METIS)

Bernhard Brandl, Olivier Absil, Tibor Agócs, Nicola Baccichet, Thomas Bertram, Felix Bettonvil, Roy van Boekel, Leonard Burtscher, Ewine van Dishoeck, Markus Feldt, Paulo J. Garcia, Alistair Glasse, Adrian Glauser, Manuel Güdel, Christoph Haupt, Matthew Kenworthy, Lucas Labadie, Werner Laun, Dirk Lesman, Eric Pantin, Sascha Quanz, Ignas Snellen, Ralf Siebenmorgen, Hans van Winckel

Proceedings Volume 10702, 107021U (2018) https://doi.org/10.1117/12.2311492

KEYWORDS: Imaging systems, Calibration, Imaging spectroscopy, Planets, Adaptive optics, Coronagraphy, Mirrors, Spectrographs, Spectroscopy, Telescopes

Read Abstract +

Proceedings Article | 6 July 2018 Paper

Paper

Development of an alignment platform for ESO's mid-infrared E-ELT imager and spectrograph (METIS)

André Boné, António Amorim, Paulo Gordo, Izabella Hemprich, Gabby Kroes, Adrian Glauser, Stephen March, Gert Raskin, Paulo Garcia

Proceedings Volume 10698, 1069861 (2018) https://doi.org/10.1117/12.2312495

KEYWORDS: Actuators, Earthquakes, Telescopes, Imaging systems, Spectrographs, 3D modeling, Mid-IR, Kinematics

Read Abstract +

Proceedings Article | 4 August 2016 Paper

Paper

User-friendly imaging algorithms for interferometry

John Young, Éric Thiébaut, Gilles Duvert, Martin Vannier, Paulo Garcia, Guillaume Mella

Proceedings Volume 9907, 99073N (2016) https://doi.org/10.1117/12.2233381

KEYWORDS: Reconstruction algorithms, Image restoration, Interferometry, Algorithm development, Human-machine interfaces, Image processing, Data modeling, Detection and tracking algorithms, Prototyping, Optical interferometry

Read Abstract +

Proceedings Article | 4 August 2016 Paper

Paper

GRAVITY acquisition camera: characterization results

Narsireddy Anugu, Paulo Garcia, Antonio Amorim, Erich Wiezorrek, Ekkehard Wieprecht, Frank Eisenhauer, Thomas Ott, Oliver Pfuhl, Paulo Gordo, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9907, 990727 (2016) https://doi.org/10.1117/12.2233315

KEYWORDS: Stars, Cameras, Telescopes, Optical tracking, Imaging systems, Sensors, Electroluminescent displays, Image sensors, Actuators, Mirrors

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

Integration and testing of the GRAVITY infrared camera for multiple telescope optical beam analysis

Paulo Gordo, Antonio Amorim, Jorge Abreu, Frank Eisenhauer, Narsireddy Anugu, Paulo Garcia, Oliver Pfuhl, Marcus Haug, Eckhard Sturm, Ekkehard Wieprecht, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut, M. Duarte Naia, M. Guimarães

Proceedings Volume 9146, 91461V (2014) https://doi.org/10.1117/12.2056572

KEYWORDS: Cameras, Telescopes, Beam analyzers, Sensors, Optical alignment, Optics manufacturing, Mirrors, Imaging systems, Silica, Beam splitters

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

Optimal a posteriori fringe tracking in optical interferometry

Ferréol Soulez, Éric Thiebaut, Michel Tallon, Isabelle Tallon-Bosc, Paulo Garcia

Proceedings Volume 9146, 91462Y (2014) https://doi.org/10.1117/12.2056590

KEYWORDS: Visibility, Signal to noise ratio, Sensors, Data modeling, Photons, Optical tracking, Interferometry, Optical interferometry, Turbulence, Colorimetry

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

The GRAVITY/VLTI acquisition camera software

Narsireddy Anugu, Paulo J. Garcia, Ekkehard Wieprecht, Antonio Amorim, Leonard Burtscher, Thomas Ott, Paulo Gordo, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9146, 91462C (2014) https://doi.org/10.1117/12.2055831

KEYWORDS: Imaging systems, Cameras, Telescopes, Sensors, Image sensors, Refraction, Stars, Wavefronts, Device simulation, Databases

Read Abstract +

Proceedings Article | 24 July 2014 Paper

Paper

Two, three, four, or six telescopes with phase referencing or closure phase relations: the best tactics for interferometric image reconstruction

Nuno Gomes, Paulo J. V. Garcia, Éric Thiébaut

Proceedings Volume 9146, 91462M (2014) https://doi.org/10.1117/12.2056545

KEYWORDS: Telescopes, Image restoration, Ultraviolet radiation, Ultraviolet telescopes, Visibility, Point spread functions, Interferometry, Spatial frequencies, Stars, Reconstruction algorithms

Read Abstract +

Proceedings Article | 21 July 2014 Paper

Paper

Near-infrared aberration tracking using a correlation algorithm on the Galactic Center

Narsireddy Anugu, Paulo Garcia, Antonio Amorim, Paulo Gordo, Frank Eisenhauer, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 9148, 91485B (2014) https://doi.org/10.1117/12.2055869

KEYWORDS: Sensors, Wavefronts, Image sensors, Wavefront sensors, Telescopes, Reconstruction algorithms, Detection and tracking algorithms, Electroluminescent displays, Adaptive optics, Wavefront aberrations

Read Abstract +

Proceedings Article | 12 September 2012 Paper

Paper

The final design of the GRAVITY acquisition camera and associated VLTI beam monitoring strategy

Antonio Amorim, Jorge Lima, Narsireddy Anugu, Frank Eisenhauer, Alexander Graeter, Marcus Haug, Thomas Ott, Oliver Pfuhl, Markus Thiel, Ekkehard Wieprecht, Pedro Carvas, Paulo Garcia, Guy Perrin, Wolfgang Brandner, Christian Straubmeier, Karine Perraut

Proceedings Volume 8445, 844534 (2012) https://doi.org/10.1117/12.925993

KEYWORDS: Sensors, Cameras, Imaging systems, Telescopes, Lenses, Beam analyzers, Metrology, Semiconductor lasers, Mirrors, Image sensors

Read Abstract +

Proceedings Article | 12 September 2012 Paper

Paper

Least-squares deconvolution of AMBER dispersed visibilities

Paulo J. Garcia, Myriam Benisty, Catherine Dougados

Proceedings Volume 8445, 844517 (2012) https://doi.org/10.1117/12.925280

KEYWORDS: Visibility, Signal to noise ratio, Deconvolution, Interferometry, Calibration, Data modeling, Spectral resolution, Spectrographs, Telescopes, Analog electronics

Read Abstract +

Proceedings Article | 26 July 2011 Paper

Paper

Integrated optics for astronomical interferometry

P. V. S. Marques, A. Ghasempour, D. Alexandre, A. M. P. Leite, P. J. V. Garcia, F. Reynaud

Proceedings Volume 8001, 800128 (2011) https://doi.org/10.1117/12.894418

KEYWORDS: Integrated optics, Visibility, Sol-gels, Waveguides, Astronomical interferometry, Interferometry, Optical fibers, Ultraviolet radiation, Rapid manufacturing, Photometry

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

Defining requirements and identifying relevant technologies in astrophotonics

Jeremy Allington-Smith, Timothy Birks, Joss Bland-Hawthorn, Colin Cunningham, Sonali Dagupta, Roger Haynes, Paulo J. Garcia, Ajoy Kar, Andreas Kelz, Pierre Kern, Lucas Labadie, Jon Lawrence, Etienne Le Coarer, Martin Roth, Stefano Minardi, Ray Sharples, Robert Thomson

Proceedings Volume 7739, 773925 (2010) https://doi.org/10.1117/12.857228

KEYWORDS: Astrophotonics, Interferometry, Waveguides, Astronomy, Sensors, Photonic devices, Spectroscopy, Integrated optics, Spectrographs, Telescopes

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

The hydrogen emission of young stellar objects: key science for next-generation instruments and facilities

Paulo J. Garcia, Myriam Benisty, Samira Rajabi, Catherine Dougados, Fabrizzio Massi, Francesca Bacciotti, Jean-Baptiste Le Bouquin, Fabien Malbet, Linda Podio, Stephanie Renard, Emma Whelan

Proceedings Volume 7734, 773434 (2010) https://doi.org/10.1117/12.858302

KEYWORDS: Stars, Hydrogen, Spectroscopy, Interferometry, Magnetism, Neodymium, Visibility, Interferometers, Long baseline optical interferometry, Infrared radiation

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

Comparison between closure phase and phase referenced interferometric image reconstructions

Nuno Gomes, Paulo J. Garcia, Eric Thiébaut, Stéphanie Renard, Mercedes Filho

Proceedings Volume 7734, 773438 (2010) https://doi.org/10.1117/12.857146

KEYWORDS: Stars, Signal to noise ratio, Visibility, Image restoration, Interferometry, Reconstruction algorithms, Photometry, Data modeling, Phase interferometry, Image quality

Read Abstract +

Proceedings Article | 22 July 2010 Paper

Paper

Hybrid sol-gel technology for fast prototyping in astronomical interferometry

A. Ghasempour, A. M. P. Leite, D. Alexandre, F. Reynaud, P. V. S. Marques, P. J. Garcia

Proceedings Volume 7734, 77343X (2010) https://doi.org/10.1117/12.857143

KEYWORDS: Sol-gels, Astronomy, Prototyping, Interferometry, Visibility, Telescopes, Fabrication, Integrated optics, Computer aided design, Dispersion

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Phase closure image reconstruction for future VLTI instrumentation

Mercedes Filho, Stephanie Renard, Paulo Garcia, Gilles Duvert, Eric Thiebaut, John Young, Olivier Absil, Jean-Phillipe Berger, Thomas Beckert, Sebastian Hoenig, Dieter Schertl, Gerd Weigelt, Leonardo Testi, Eric Tatuli, Virginie Borkowski, Michaël de Becker, Jean Surdej, Bernard Aringer, Joseph Hron, Thomas Lebzelter, Andrea Chiavassa, Romano Corradi, Tim Harries

Proceedings Volume 7013, 70133Z (2008) https://doi.org/10.1117/12.787877

KEYWORDS: Telescopes, Visibility, Image restoration, Interferometry, Astatine, Data modeling, Stars, Interferometers, Fourier transforms, Optical interferometry

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Science case for 1 mas spectro-imagining in the near-infrared

Paulo Garcia, Jean-Philippe Berger, Alessandro Marconi, Alexander Krivov, Andrea Chiavassa, Bernard Aringer, Brunella Nisini, Denis Defrére, Dimitri Mawet, Dieter Schertl, Eric Tatuli, Eric Thiébaut, Fabien Baron, Fabien Malbet, Gaspard Duchéne, Gerd Weigelt, Gilles Duvert, Gilles Henri, Hubert Klahr, Jean Surdej, Jean-Charles Augereau, Jean-François Claeskens, John Young, Josef Hron, Karine Perraut, Karl-Heinz Hofmann, Leonardo Testi, Margarida Cunha, Mercedes Filho, Michaël De Becker, Olivier Absil, Olivier Chesneau, Pierre Collette, Pierre-Olivier Petrucci, Ralph Neuhaeuser, Romano Corradi, Sónia Antón, Sebastian Wolf, Sebastian Hoenig, Stephanie Renard, Thierry Forveille, Thomas Beckert, Thomas Lebzelter, Tim Harries, Virginie Borkowski, Xavier Bonfils

Proceedings Volume 7013, 70134N (2008) https://doi.org/10.1117/12.789216

KEYWORDS: Stars, Telescopes, Spatial resolution, Planets, Galactic astronomy, Adaptive optics, Spectral resolution, Visibility, Interferometry, High dynamic range imaging

Read Abstract +

We present the work developed within the science team of the Very Large Telescope Interferometer Spectro-Imager (VSI) during the Phase A studies. VSI aims at delivering ~ 1 milliarcsecond resolution data cubes in the near-infrared, with several spectral resolutions up to 12 000, by combining up to 8 VLTI telescopes. In the design of an instrument, the science case plays a central role by supporting the instrument construction decision, defining the top-level requirements and balancing design options. The overall science philosophy of VSI was that of a general user instrument serving a broad community. The science team addressed themes which included several areas of astrophysics and illustrated specific modes of operation of the instrument: a) YSO disks and winds; b) Multiplicity of young stars; c) Exoplanets; d) Debris disks; e) Stellar surface imaging; f) The environments of evolved stars; g) AGN tori; h) AGN's Broad Line Region; i) Supermassive black-holes; and j) Microlensing. The main conclusions can be summarized as follows: a) The accessible targets and related science are extremely sensitive to the instrument limiting magnitude; the instrument should be optimized for sensitivity and have its own fringe tracker. b) Most of the science cases are readily achievable with on-axis fringe tracking, off-axis fringe tracking enabling extra science. c) In most targets (YSOs, evolved stars and AGNs), the interpretation and analysis of circumstellar/nuclear dust morphology requires direct access to the gas via spectral resolved studies of emission lines, requiring at least a spectral resolution of 2 500. d) To routinely deliver images at the required sensitivity, the number of telescopes in determinant, with 6 telescopes being favored. e) The factorial increase in the number of closure phases and visibilities, gained in a single observation, makes massive surveys of parameters and related science for the first time possible. f) High dynamic range imaging and very high dynamic range differential closure phase are possible allowing the study of debris disks and characterization of pegasides. g) Spectro-imaging in the near-infrared is highly complementary to ALMA, adaptive optics and interferometric imaging in the thermal infrared.

Proceedings Article | 28 July 2008 Paper

Paper

VSI: the VLTI spectro-imager

F. Malbet, D. Buscher, G. Weigelt, P. Garcia, M. Gai, D. Lorenzetti, J. Surdej, J. Hron, R. Neuhäuser, P. Kern, L. Jocou, J.-P. Berger, O. Absil, U. Beckmann, L. Corcione, G. Duvert, M. Filho, P. Labeye, E. Le Coarer, G. Li Causi, J. Lima, K. Perraut, E. Tatulli, E. Thiébaut, J. Young, G. Zins, A. Amorim, B. Aringer, T. Beckert, M. Benisty, X. Bonfils, A. Cabral, A. Chelli, O. Chesneau, A. Chiavassa, R. Corradi, M. De Becker, A. Delboulbé, G. Duchêne, T. Forveille, C. Haniff, E. Herwats, K.-H. Hofmann, J.-B. Le Bouquin, S. Ligori, D. Loreggia, A. Marconi, A. Moitinho, B. Nisini, P.-O. Petrucci, J. Rebordao, R. Speziali, L. Testi, F. Vitali

Proceedings Volume 7013, 701329 (2008) https://doi.org/10.1117/12.789710

KEYWORDS: Telescopes, Stars, Spectral resolution, Spatial resolution, Interferometry, Integrated optics, Space telescopes, Visibility, Image restoration, Signal to noise ratio

Read Abstract +

The VLTI Spectro Imager (VSI) was proposed as a second-generation instrument of the Very Large Telescope Interferometer providing the ESO community with spectrally-resolved, near-infrared images at angular resolutions down to 1.1 milliarcsecond and spectral resolutions up to R = 12000. Targets as faint as K = 13 will be imaged without requiring a brighter nearby reference object; fainter targets can be accessed if a suitable reference is available. The unique combination of high-dynamic-range imaging at high angular resolution and high spectral resolution enables a scientific program which serves a broad user community and at the same time provides the opportunity for breakthroughs in many areas of astrophysics. The high level specifications of the instrument are derived from a detailed science case based on the capability to obtain, for the first time, milliarcsecond-resolution images of a wide range of targets including: probing the initial conditions for planet formation in the AU-scale environments of young stars; imaging convective cells and other phenomena on the surfaces of stars; mapping the chemical and physical environments of evolved stars, stellar remnants, and stellar winds; and disentangling the central regions of active galactic nuclei and supermassive black holes. VSI will provide these new capabilities using technologies which have been extensively tested in the past and VSI requires little in terms of new infrastructure on the VLTI. At the same time, VSI will be able to make maximum use of new infrastructure as it becomes available; for example, by combining 4, 6 and eventually 8 telescopes, enabling rapid imaging through the measurement of up to 28 visibilities in every wavelength channel within a few minutes. The current studies are focused on a 4-telescope version with an upgrade to a 6-telescope one. The instrument contains its own fringe tracker and tip-tilt control in order to reduce the constraints on the VLTI infrastructure and maximize the scientific return.

Proceedings Article | 28 July 2008 Paper

Paper

System overview of the VLTI Spectro-Imager

L. Jocou, J. P. Berger, F. Malbet, P. Kern, U. Beckmann, D. Lorenzetti, L. Corcione, G. Li Causi, D. Buscher, J. Young, M. Gai, G. Weigelt, G. Zins, G. Duvert, K. Perraut, P. Labeye, O. Absil, P. Garcia, D. Loreggia, J. Lima, J. Rebordao, S. Ligori, A. Amorim, P. Rabou, J. B. Le Bouquin, C. Haniff, E. Le Coarer, P. Feautrier, G. Duchene, M. Benisty, A. Chelli, E. Herwats, A. Delboulbé

Proceedings Volume 7013, 70132Y (2008) https://doi.org/10.1117/12.789154

KEYWORDS: Optical fibers, Mirrors, Sensors, Beam splitters, Interferometry, Spectrographs, Fourier transforms, Calibration, Information operations, Computed tomography

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Rapid prototyping of integrated sol-gel devices for astronomical interferometry

A. Ghasempour, D. Alexandre, C. Brites, P. Moreira, F. Reynaud, P. Marques, A. Leite, P. Garcia

Proceedings Volume 7013, 701317 (2008) https://doi.org/10.1117/12.788845

KEYWORDS: Sol-gels, Optical fibers, Integrated optics, Waveguides, Astronomy, Computer aided design, Semiconductor lasers, Rapid manufacturing, Astronomical interferometry, Ultraviolet radiation

Read Abstract +

Proceedings Article | 28 July 2008 Paper

Paper

Phase referencing in optical interferometry

Mercedes Filho, Paulo Garcia, Gilles Duvert, Gaspard Duchene, Eric Thiebaut, John Young, Olivier Absil, Jean-Phillipe Berger, Thomas Beckert, Sebastian Hoenig, Dieter Schertl, Gerd Weigelt, Leonardo Testi, Eric Tatuli, Virginie Borkowski, Michaël de Becker, Jean Surdej, Bernard Aringer, Joseph Hron, Thomas Lebzelter, Andrea Chiavassa, Romano Corradi, Tim Harries

Proceedings Volume 7013, 70131F (2008) https://doi.org/10.1117/12.787908

KEYWORDS: Visibility, Image restoration, Optical interferometry, Image resolution, Stars, Telescopes, Radio optics, Interferometry, Signal to noise ratio, Fourier transforms

Read Abstract +

Proceedings Article | 27 June 2006 Paper

Paper

VSI: a milli-arcsec spectro-imager for the VLTI

F. Malbet, P. Kern, J.-P. Berger, L. Jocou, P. Garcia, D. Buscher, K. Rousselet-Perraut, G. Weigelt, M. Gai, J. Surdej, J. Hron, R. Neuhäuser, E. Le Coarer, P. Labeye, J. Le Bouquin, M. Benisty, E. Herwats

Proceedings Volume 6268, 62680Y (2006) https://doi.org/10.1117/12.673098

KEYWORDS: Telescopes, Stars, Information operations, Integrated optics, Spectral resolution, Spectrographs, Imaging spectroscopy, Sensors, Adaptive optics, Phase measurement

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

Observing jets in young stellar objects with AMBER/VLTI

Carla Gil, Eric Thiebaut, Paulo Garcia, Markus Schoeller

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.551941

KEYWORDS: Stars, Magnetism, Collimation, Signal to noise ratio, Spatial resolution, Phase measurement, Image restoration, Spectral resolution, Visibility, Interferometry

Read Abstract +

Proceedings Article | 20 October 2004 Paper

Paper

VITRUV, a second-generation VLTI instrument for aperture synthesis imaging with eight telescopes

Fabien Malbet, Jean-Philippe Berger, Pierre Kern, Karine Rousselet-Perraut, Pierre-Olivier Petrucci, Francois Menard, Alain Chelli, Gilles Duvert, Jean-Baptiste Lebouquin, Eric Tatulli, Pierre Labeye, Isabelle Schanen-Duport, Eric Thiebaut, Paulo Garcia, I. Carvalho

Proceedings Volume 5491, (2004) https://doi.org/10.1117/12.550673

KEYWORDS: Telescopes, Stars, Synthetic apertures, Magnetism, Integrated optics, Spatial resolution, Interferometers, Interferometry, Objectives, Radio optics

Read Abstract +

Showing 5 of 42 publications

SIGN IN TO:

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Advertisement

Advertisement