On-sky performance evaluation of RITMOS, a micromirror-based multi-object spectrometer

Anton Travinsky; Dmitry Vorobiev; Kathleen Oram; Gregory M. Nero; Zoran Ninkov

doi:10.1117/12.2313690

6 July 2018 On-sky performance evaluation of RITMOS, a micromirror-based multi-object spectrometer

Anton Travinsky, Dmitry Vorobiev, Kathleen Oram, Gregory M. Nero, Zoran Ninkov

Author Affiliations +

Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII; 107021N (2018) https://doi.org/10.1117/12.2313690
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

Multi-object spectrometers (MOSs) are astronomical instruments capable of accurately acquiring spectra of up to several hundreds of objects of interest in a single exposure. Digital micromirror devices (DMDs) have proven to be an excellent candidate for use as slit masks in both terrestrial and space-based MOSs because they are highly reliable and rapidly re-configurable. The Rochester Institute of Technology Multi-Object Spectrometer (RITMOS) is a terrestrial DMD-based MOS, which uses a newer generation DMD, with improved scattered light characteristics. RITMOS utilizes a 0.700 XGA DMD with a micromirror pitch of 13.68 microns and a micromirror flip angle of 12 degrees. By design, RITMOS covers the spectral range 3900 - 4900 angstroms, with a dispersion of 0.7 angstroms per pixel; the resolving power is R∼5300. Performance evaluation has been conducted both in the laboratory and on-sky. The results presented here show that DMD-based MOSs are highly capable instruments, offering great observational flexibility, while achieving excellent signal-to-noise ratios by optimally rejecting the sky background.

Conference Presentation

Citation Download Citation

Anton Travinsky, Dmitry Vorobiev, Kathleen Oram, Gregory M. Nero, and Zoran Ninkov "On-sky performance evaluation of RITMOS, a micromirror-based multi-object spectrometer", Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107021N (6 July 2018); https://doi.org/10.1117/12.2313690

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