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Proceedings Paper

On-sky performance evaluation of RITMOS, a micromirror-based multi-object spectrometer
Author(s): Anton Travinsky; Dmitry Vorobiev; Kathleen Oram; Gregory M. Nero; Zoran Ninkov
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Paper 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.

Paper Details

Date Published: 6 July 2018
PDF: 10 pages
Proc. SPIE 10702, Ground-based and Airborne Instrumentation for Astronomy VII, 107021N (6 July 2018); doi: 10.1117/12.2313690
Show Author Affiliations
Anton Travinsky, Rochester Institute of Technology (United States)
Dmitry Vorobiev, Rochester Institute of Technology (United States)
Kathleen Oram, Rochester Institute of Technology (United States)
Gregory M. Nero, Rochester Institute of Technology (United States)
Zoran Ninkov, Rochester Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10702:
Ground-based and Airborne Instrumentation for Astronomy VII
Christopher J. Evans; Luc Simard; Hideki Takami, Editor(s)

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