Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.8106p&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #81.06; Bulletin of the American Astronomical Society, Vol. 30, p.1154
Astronomy and Astrophysics
Astronomy
Scientific paper
The Wide-Field Infrared Explorer (WIRE) is a small cryogenic spaceborne infrared telescope being readied for launch in September 1998 as the fifth of NASA's Small Explorers. WIRE illuminates two 128 x 128 Si:As Focal Plane Arrays (FPAs) produced by Boeing North American with a 30 cm diameter Ritchey Cretien diamond turned mirror system. A dichroic beam splitter and band-pass filter define two broad pass bands for a deep pointed survey to search for protogalaxies and to study the evolution of starburst galaxies. The Space Dynamics Laboratory at Utah State University (SDL/USU) measured the spectral responsivity of the WIRE sensor using the SDL multifunction infrared calibrator (MIC2) and a step- scan interferometer. The primary objective of the spectral responsivity calibration was the array-average relative spectral responsivity (RSR) measurement of each WIRE FPA under nominal operating conditions. The array-average RSR measurement is composed of two parts, a high spectral resolution in-band measurement and an out-of-band measurement that extended the noise floor of the RSR measurement outside the WIRE spectral passbands to approximately 1E-5 of the in-band peak. In addition to the array average RSR at nominal operating conditions, SDL personnel also investigated the WIRE RSR sensitivity to FPA position, temperature and bias voltage. The WIRE spectral calibration method is described, and the results are presented.
Gibbons Wes
Herter Terry
Peterson Jeffrey
Sevilla P.
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