urn:nasa:pds:context:instrument:irtf-maunakea.3m2.mirac 1.0 1.16.0.0 Product_Context urn:nasa:pds:context:instrument:irtf.3m0.mirac MIRAC 2021-12-07 1.0 per RMS, deprecated irtf in favor of irtf-maunakea urn:nasa:pds:context:telescope:irtf-maunakea.3m2 instrument_to_telescope 10.1117/12.158697 Hoffmann, W.F., et al., (1993), MIRAC: a mid-infrared array camera for astronomy, Proc. SPIE 1946, Infrared Detectors and Instrumentation (20 October 1993). Mid-Infrared Array Camera Imager MIRAC (Mid-Infrared Array Camera) was built by Steward Observatory at the University of Arizona, Harvard Smithsonian Center for Astrophysics, and the Center for Advanced Space Sensing at the Naval Research Laboratory. It uses a Hughes Aircraft Co. 20 X 64 pixel arsenic-doped silicon impurity band conduction hybrid array with a capacitance transimpedance amplifier readout (CRC 444A) operating at 10 K in a liquid- helium-cooled cryostat. The operating wavelength of MIRAC is 2 to 26 µm. Using 20 parallel readout lines and frame rate of 10 KHz, the array exhibits low noise and good linearity at high background flux, which is essential for 10 and 20 µm ground-based observing conditions. Peak efficiency of 0.42 at 22 µm, and a well size of 120,000 electrons. MIRAC operated on Steward Observatory 2.3-meter and the IRTF 3.0-meter telescopes for observing a variety of objects including infrared-luminous galaxies, planetary nebulae, star forming regions, young stellar objects, and Solar System objects. The NEFD of the MIRAC on the IRTF at 11.7 µm is 0.1 Jy/arcsec^2 in one second of integration on-source, four seconds of total time, including nodding and chopping off-source.