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Proceedings Paper

MIRAC2: a mid-infrared array camera for astronomy
Author(s): William F. Hoffmann; Joseph L. Hora; Giovanni G. Fazio; Lynne K. Deutsch; Aditya Dayal
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Paper Abstract

MIRAC2 was built for ground-based astronomy at Steward Observatory, University of Arizona and Harvard-Smithsonian Center for Astrophysics. It utilizes a Rockwell HF-16 128 X 128 arsenic-doped silicon blocked-impurity-band hybrid array with a wavelength range of 2 to 28 micrometers operating in a liquid helium-cooled cryostat at 5K. Reflective optics, and externally actuated detector and pupil slides provide a variety of magnification and focal ratio settings without opening the cryostat. Nominal settings at the NASA IRTF and UKIRT give diffraction-limited imaging with .34 and .27 arcsec/pixel, respectively. The sensitivity on the IRTF at 11.7 micrometers , 10 percent bandwidth filter, chop-nod, source in one beam, 1 sigma, one minute total time is 25 mJ/arcsec surface brightness and 43 mJy point source.

Paper Details

Date Published: 21 August 1998
PDF: 12 pages
Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998); doi: 10.1117/12.317327
Show Author Affiliations
William F. Hoffmann, Steward Observatory/Univ. of Arizona (United States)
Joseph L. Hora, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Giovanni G. Fazio, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Lynne K. Deutsch, Boston Univ. (United States)
Aditya Dayal, Jet Propulsion Lab. (United States)

Published in SPIE Proceedings Vol. 3354:
Infrared Astronomical Instrumentation
Albert M. Fowler, Editor(s)

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