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Proceedings Paper

Simultaneous infrared-visible imager/spectrograph: a multi-purpose instrument for the Magdalena Ridge Observatory 2.4-m telescope
Author(s): M. B. Vincent; E. V. Ryan
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Paper Abstract

The Simultaneous Infrared-Visible Imager/Spectrograph (SIRVIS) is a planned multi-purpose instrument for the Magdalena Ridge Observatory 2.4 m telescope located west of Socorro, NM. The primary science drivers are asteroid studies, the rapid response to astrophysical transient phenomena and observations of artificial targets such as satellites. For asteroid science, the wavelength range 0.39-2.5 μm gives the most mineralogically diagnostic information on surface compositions using standard filters and low-resolution, R ~ 200, spectroscopy. For transients, the telescope's rapid 10°/second slew rate will facilitate acquisition of data on any target within one minute of receipt of notice. For artificial targets, simultaneous two-color imaging will assist in unique determinations and overall condition monitoring. SIRVIS has two channels, a cryogenic NIR channel covering 0.85-2.5 μm at 0.27 arcsec/pixel, and an ambient temperature-pressure visible channel covering 0.39-1.0 μm at 0.15 arcsec/pixel. The beam is split by a cryogenic, red-pass dichroic mirror located between the telescope focal plane and the respective collimators. Both channels use refractive optics. The instrument is being designed to initially phase in the visible channel, then the NIR channel, and readily accommodate upgrades. For sky subtraction, the telescope is nodded between 30-60 second NIR integrations. Long visible integrations are made possible by shifting the CCD charge in sync with the nod.

Paper Details

Date Published: 30 June 2006
PDF: 7 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62692N (30 June 2006); doi: 10.1117/12.670360
Show Author Affiliations
M. B. Vincent, Magdalena Ridge Observatory, New Mexico Institute of Mining and Technology (United States)
E. V. Ryan, Magdalena Ridge Observatory, New Mexico Institute of Mining and Technology (United States)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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