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Session 3 - SIRTF.
Display session, Monday, January 13
Metropolitan Ballroom,
The Infrared Array Camera (IRAC) is a four-channel imager packaged in a single module which is part of the SIRTF cyrogenic instrument volume. Simultaneous 5.12 x 5.12 arcmin images at 3.5, 4.5, 6.3 and 8.0 microns are provided with 25% bandwidth at each wavelength. The pixel size is 1.2 arcsec in all bands. Two adjacent fields of view in the SIRTF focal plane support the four channels in pairs (3.5 and 6.3 microns; 4.5 and 8.0 microns). All four detector arrays in the camera are 256 x 256 pixels in size, with the two short wavelength arrays using InSb and the two longer wavelength arrays Si:As as detector material. The IRAC sensitivity (5 sigma, 200 sec) at 3.5, 4.5, 6.3, and 8.0 microns is 4.1, 5.2, 29, and 49 microJansky, respectively. Two of the most important scientific objectives of IRAC will be to carry out surveys to study galaxy formation during the early stages of the Universe, and to search for brown dwarfs.
