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Stability of the Infrared Array Camera for the Spitzer Space Telescope

Carey, S. and Surace, J. and Lacy, M. and Glaccum, W. and Lowrance, P. and Hora, J. L. and Willner, S. (2008) Stability of the Infrared Array Camera for the Spitzer Space Telescope. In: Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter. Proceedings of SPIE. No.7010. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70102V. ISBN 9780819472205.

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We present an analysis of the stability of the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope over the first 4.5 years of in-flight operations. IRAC consists of two InSb and two Si:As 256x256 imaging arrays with passbands centered on 3.6, 4.5. 5.8 and 8.0 microns. Variations in photometric stability, read noise, dark offsets, pixel responsivity and number of hot and noisy pixels for each detector array are trended with time. To within our measurement uncertainty, the performance of the IRAC arrays has not changed with time. The most significant variation is that number of hot pixels in the 8 micron array has increased linearly with time at a rate of 60 pixels per year. We expect that the 3.6 and 4.5 micron arrays should remain stable during the post-cryogenic phase of the Spitzer mission. We will briefly discuss some science that is enabled by the excellent stability of IRAC.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Carey, S.0000-0002-0221-6871
Surace, J.0000-0001-7291-0087
Lacy, M.0000-0002-3032-1783
Lowrance, P.0000-0001-8014-0270
Hora, J. L.0000-0002-5599-4650
Willner, S.0000-0002-9895-5758
Additional Information:© 2008 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors acknowledge the efforts of our colleagues in the IRAC instrument and instrument support teams in maintaining and characterizing the IRAC instrument. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:infrared detectors, space telescopes, Spitzer Space Telescope, IRAC
Series Name:Proceedings of SPIE
Issue or Number:7010
Record Number:CaltechAUTHORS:20190516-140257141
Persistent URL:
Official Citation:S. Carey, J. Surace, M. Lacy, W. Glaccum, P. Lowrance, J. L. Hora, and S. Willner "Stability of the Infrared Array Camera for the Spitzer Space Telescope", Proc. SPIE 7010, Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter, 70102V (12 July 2008); doi: 10.1117/12.790030;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:95547
Deposited By: Tony Diaz
Deposited On:16 May 2019 22:02
Last Modified:03 Oct 2019 21:14

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