8 July 2014 ERIS: preliminary design phase overview
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Abstract
The Enhanced Resolution Imager and Spectrograph (ERIS) is the next-generation adaptive optics near-IR imager and spectrograph for the Cassegrain focus of the Very Large Telescope (VLT) Unit Telescope 4, which will soon make full use of the Adaptive Optics Facility (AOF). It is a high-Strehl AO-assisted instrument that will use the Deformable Secondary Mirror (DSM) and the new Laser Guide Star Facility (4LGSF). The project has been approved for construction and has entered its preliminary design phase. ERIS will be constructed in a collaboration including the Max- Planck Institut für Extraterrestrische Physik, the Eidgenössische Technische Hochschule Zürich and the Osservatorio Astrofisico di Arcetri and will offer 1 - 5 μm imaging and 1 - 2.5 μm integral field spectroscopic capabilities with a high Strehl performance. Wavefront sensing can be carried out with an optical high-order NGS Pyramid wavefront sensor, or with a single laser in either an optical low-order NGS mode, or with a near-IR low-order mode sensor. Due to its highly sensitive visible wavefront sensor, and separate near-IR low-order mode, ERIS provides a large sky coverage with its 1’ patrol field radius that can even include AO stars embedded in dust-enshrouded environments. As such it will replace, with a much improved single conjugated AO correction, the most scientifically important imaging modes offered by NACO (diffraction limited imaging in the J to M bands, Sparse Aperture Masking and Apodizing Phase Plate (APP) coronagraphy) and the integral field spectroscopy modes of SINFONI, whose instrumental module, SPIFFI, will be upgraded and re-used in ERIS. As part of the SPIFFI upgrade a new higher resolution grating and a science detector replacement are envisaged, as well as PLC driven motors. To accommodate ERIS at the Cassegrain focus, an extension of the telescope back focal length is required, with modifications of the guider arm assembly. In this paper we report on the status of the baseline design. We will also report on the main science goals of the instrument, ranging from exoplanet detection and characterization to high redshift galaxy observations. We will also briefly describe the SINFONI-SPIFFI upgrade strategy, which is part of the ERIS development plan and the overall project timeline.
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Harald Kuntschner, Harald Kuntschner, Lieselotte Jochum, Lieselotte Jochum, Paola Amico, Paola Amico, Johannes K. Dekker, Johannes K. Dekker, Florian Kerber, Florian Kerber, Enrico Marchetti, Enrico Marchetti, Matteo Accardo, Matteo Accardo, Roland Brast, Roland Brast, Martin Brinkmann, Martin Brinkmann, Ralf D. Conzelmann, Ralf D. Conzelmann, Bernard Alexis Delabre, Bernard Alexis Delabre, Michel Duchateau, Michel Duchateau, Enrico Fedrigo, Enrico Fedrigo, Gert Finger, Gert Finger, Christoph Frank, Christoph Frank, Fernando Gago Rodriguez, Fernando Gago Rodriguez, Barbara Klein, Barbara Klein, Jens Knudstrup, Jens Knudstrup, Miska Le Louarn, Miska Le Louarn, Lars Lundin, Lars Lundin, Andrea Modigliani, Andrea Modigliani, Michael Müller, Michael Müller, Mark Neeser, Mark Neeser, Sebastien Tordo, Sebastien Tordo, Elena Valenti, Elena Valenti, Frank Eisenhauer, Frank Eisenhauer, Eckhard Sturm, Eckhard Sturm, Helmut Feuchtgruber, Helmut Feuchtgruber, Elisabeth M. George, Elisabeth M. George, Michael Hartl, Michael Hartl, Reiner Hofmann, Reiner Hofmann, Heinrich Huber, Heinrich Huber, Markus P. Plattner, Markus P. Plattner, Josef Schubert, Josef Schubert, Karl Tarantik, Karl Tarantik, Erich Wiezorrek, Erich Wiezorrek, Michael R. Meyer, Michael R. Meyer, Sascha P. Quanz, Sascha P. Quanz, Adrian M. Glauser, Adrian M. Glauser, Harald Weisz, Harald Weisz, Simone Esposito, Simone Esposito, Marco Xompero, Marco Xompero, Guido Agapito, Guido Agapito, Jacopo Antichi, Jacopo Antichi, Valdemaro Biliotti, Valdemaro Biliotti, Marco Bonaglia, Marco Bonaglia, Runa Briguglio, Runa Briguglio, Luca Carbonaro, Luca Carbonaro, Giovanni Cresci, Giovanni Cresci, Luca Fini, Luca Fini, Enrico Pinna, Enrico Pinna, Alfio T. Puglisi, Alfio T. Puglisi, Fernando Quirós-Pacheco, Fernando Quirós-Pacheco, Armando Riccardi, Armando Riccardi, Gianluca Di Rico, Gianluca Di Rico, Carmelo Arcidiacono, Carmelo Arcidiacono, Mauro Dolci, Mauro Dolci, } "ERIS: preliminary design phase overview", Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91471U (8 July 2014); doi: 10.1117/12.2055140; https://doi.org/10.1117/12.2055140
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