Performance of the infrared array camera (IRAC) for SIRTF during instrument integration and test

The Infrared Array Camera (IRAC) is one of three focal plane instruments in the Space Infrared Telescope Facility (SIRTF). IRAC is a four-channel camera that obtains simultaneous images at 3.6, 4.5, 5.8, and 8 microns. Two adjacent 5.12x5.12 arcmin fields of view in the SIRTF focal plane are viewed by the four channels in pairs (3.6 and 5.8 microns; 4.5 and 8 microns). All four detector arrays in the camera are 256x256 pixels in size, with the two shorter wavelength channels using InSb and the two longer wavelength channels using Si:As IBC detectors. We describe here the results of the instrument functional and calibration tests completed at Ball Aerospace during the integration with the cryogenic telescope assembly, and provide updated estimates of the in-flight sensitivity and performance of IRAC in SIRTF.

[1]  George H. Rieke,et al.  Space Infrared Telescope Facility (SIRTF) , 1998, Astronomical Telescopes and Instrumentation.

[2]  Paul Murdin.  Space Infrared Telescope Facility (SIRTF) , 2000 .

[3]  Michael W. Werner.  SIRTF: an overview , 2000, SPIE Optics + Photonics.

[4]  E. L. Wright,et al.  The Infrared Arr ay Camera ( IRAC ) for the Space Infrared Telescope Facility ( SIRTF ) , 1998 .

[5]  James D. Garnett,et al.  InSb arrays for IRAC (infrared array camera) on SIRTF (Space Infrared Telescope Facility) , 2000, SPIE Optics + Photonics.

[6]  William J. Forrest,et al.  Development of infrared focal plane arrays for space , 1997 .

[7]  Bernhard R. Brandl,et al.  SIRTF-CTA optical performance test , 2003, SPIE Astronomical Telescopes + Instrumentation.

[8]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[9]  Bernhard R. Brandl,et al.  SIRTF-CTA optical performance test results , 2003, SPIE Astronomical Telescopes + Instrumentation.

[10]  Samuel Harvey Moseley,et al.  Calibration of the Infrared Array Camera (IRAC) for SIRTF , 2001 .

[11]  Kenneth P. Stewart,et al.  Cryotransmittance and -reflectance of filters and beamsplitters for the SIRTF infrared array camera , 2000, SPIE Optics + Photonics.

[12]  Giovanni G. Fazio,et al.  Implementation and testing of SIRTF's infrared array camera (IRAC) , 2000, SPIE Optics + Photonics.

[13]  William F. Hoffmann,et al.  Simfit and Focus Diversity: methods for determining the focus of the SIRTF telescope in space without a focus slew , 2003, SPIE Astronomical Telescopes + Instrumentation.

[14]  James D. Garnett,et al.  Si:As IBC array performance for SIRTF/IRAC , 2000, SPIE Optics + Photonics.

[15]  Albert M. Fowler,et al.  Infrared Astronomical Instrumentation , 1998 .

[16]  James D. Garnett,et al.  Si:As IBC IR focal plane arrays for ground-based and space-based astronomy , 1998, Astronomical Telescopes and Instrumentation.