Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory

Andrew J. Skemer; R. Deno Stelter; Stephanie Sallum; Nicholas MacDonald; Renate Kupke; Christopher Ratliff; Ravinder Banyal; Amirul Hasan; Hari Mohan Varshney; Arun Surya; Ajin Prakaesh; Sivarani Thirupathi; Ramya Sethuram; Govinda K.V.; Michael P. Fitzgerald; Eric Wang; Marc Kassis; Olivier Absil; Carlos Alvarez; Natasha Batalha; Marc-André Boucher; Cyril Bourgenot; Timothy Brandt; Zackery Briesemeister; Katherine de Kleer; Imke de Pater; William Deich; Devika Divakar; Guillaume Filion; Étienne Gauvin; Michael Gonzales; Thomas Greene; Philip Hinz; Rebecca Jensen-Clem; Christopher Johnson; Isabel Kain; Gabriel Kruglikov; Mackenzie Lach; Jean-Thomas Landry; Jialin Li; Michael C. Liu; James Lyke; Kenneth Magnone; Eduardo Marin; Emily Martin; Raquel Martinez; Dimitri Mawet; Brittany Miles; Dale Sandford; Patrick Sheehan; Ji Man Sohn; Jordan Stone

doi:10.1117/12.2630577

29 August 2022 Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory

Andrew J. Skemer, R. Deno Stelter, Stephanie Sallum, Nicholas MacDonald, Renate Kupke, Christopher Ratliff, Ravinder Banyal, Amirul Hasan, Hari Mohan Varshney, Arun Surya, Ajin Prakaesh, Sivarani Thirupathi, Ramya Sethuram, Govinda K.V., Michael P. Fitzgerald, Eric Wang, Marc Kassis, Olivier Absil, Carlos Alvarez, Natasha Batalha, Marc-André Boucher, Cyril Bourgenot, Timothy Brandt, Zackery Briesemeister, Katherine de Kleer, Imke de Pater, William Deich, Devika Divakar, Guillaume Filion, Étienne Gauvin, Michael Gonzales, Thomas Greene, Philip Hinz, Rebecca Jensen-Clem, Christopher Johnson, Isabel Kain, Gabriel Kruglikov, Mackenzie Lach, Jean-Thomas Landry, Jialin Li, Michael C. Liu, James Lyke, Kenneth Magnone, Eduardo Marin, Emily Martin, Raquel Martinez, Dimitri Mawet, Brittany Miles, Dale Sandford, Patrick Sheehan, Ji Man Sohn, Jordan Stone

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121840I (2022) https://doi.org/10.1117/12.2630577
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

We present the design of SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) a new 2-5 micron coronagraphic integral field spectrograph under construction for Keck Observatory. SCALES enables low-resolution (R∼50) spectroscopy, as well as medium-resolution (R∼4,000) spectroscopy with the goal of discovering and characterizing cold exoplanets that are brightest in the thermal infrared. Additionally, SCALES has a 12x12” field-of-view imager that will be used for general adaptive optics science at Keck. We present SCALES’s specifications, its science case, its overall design, and simulations of its expected performance. Additionally, we present progress on procuring, fabricating and testing long lead-time components.

Conference Presentation

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Andrew J. Skemer, R. Deno Stelter, Stephanie Sallum, Nicholas MacDonald, Renate Kupke, Christopher Ratliff, Ravinder Banyal, Amirul Hasan, Hari Mohan Varshney, Arun Surya, Ajin Prakaesh, Sivarani Thirupathi, Ramya Sethuram, Govinda K.V., Michael P. Fitzgerald, Eric Wang, Marc Kassis, Olivier Absil, Carlos Alvarez, Natasha Batalha, Marc-André Boucher, Cyril Bourgenot, Timothy Brandt, Zackery Briesemeister, Katherine de Kleer, Imke de Pater, William Deich, Devika Divakar, Guillaume Filion, Étienne Gauvin, Michael Gonzales, Thomas Greene, Philip Hinz, Rebecca Jensen-Clem, Christopher Johnson, Isabel Kain, Gabriel Kruglikov, Mackenzie Lach, Jean-Thomas Landry, Jialin Li, Michael C. Liu, James Lyke, Kenneth Magnone, Eduardo Marin, Emily Martin, Raquel Martinez, Dimitri Mawet, Brittany Miles, Dale Sandford, Patrick Sheehan, Ji Man Sohn, and Jordan Stone "Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121840I (29 August 2022); https://doi.org/10.1117/12.2630577

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