On-sky performance of SAMOS: a DMD-based multi-object spectrograph and imager for the SOAR 4.1 meter telescope

John J. Piotrowski; Massimo Robberto; Stephen A. Smee; Robert Barkhouser; Megan Donahue; Mario Gennaro; Albert Harding; Stephen Hope; Dana Koeppe; Zoran Ninkov; Jeffrey Poston; Lyle Schwartz; Andrei Tokovinin

doi:10.1117/12.3020796

18 July 2024 On-sky performance of SAMOS: a DMD-based multi-object spectrograph and imager for the SOAR 4.1 meter telescope

John J. Piotrowski, Massimo Robberto, Stephen A. Smee, Robert Barkhouser, Megan Donahue, Mario Gennaro, Albert Harding, Stephen Hope, Dana Koeppe, Zoran Ninkov, Jeffrey Poston, Lyle Schwartz, Andrei Tokovinin

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130960S (2024) https://doi.org/10.1117/12.3020796
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

In May 2024, the SOAR Adaptive-Module Optical Spectrograph (SAMOS) was installed at the SOAR 4.1 meter telescope in Cerro Pach´on, Chile. We discuss the instrument commissioning process, the integrated system performance, and first light results. SAMOS is a digital micromirror device (DMD)-based multi-object spectrograph and imager designed for use with the SOAR adaptive module ground-layer adaptive optics system. SAMOS covers 4000 Å to 9500 ˚A with a 3′ ×3′ field of view. The unique layout of the instrument allows for the spectroscopic and imaging channels to operate in parallel. While integrating spectral targets, the observer can simultaneously perform photometry on the remainder of the field, improving the spectro-photometric calibration compared to a conventional multi-object spectrograph. In SAMOS, the DMD is used as a reconfigurable slit mask that redistributes slits near-instantaneously. The spectrograph operates in a low resolution and high resolution mode with R∼2500 and R∼6500 respectively for a 0.33′′ slit width. We discuss the work completed during initial commissioning of the instrument and report the first light results.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

John J. Piotrowski, Massimo Robberto, Stephen A. Smee, Robert Barkhouser, Megan Donahue, Mario Gennaro, Albert Harding, Stephen Hope, Dana Koeppe, Zoran Ninkov, Jeffrey Poston, Lyle Schwartz, and Andrei Tokovinin "On-sky performance of SAMOS: a DMD-based multi-object spectrograph and imager for the SOAR 4.1 meter telescope", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130960S (18 July 2024); https://doi.org/10.1117/12.3020796

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