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Published November 2009 | Published + Accepted Version
Journal Article Open

Spitzer 70 and 160 μm Observations of the COSMOS Field


We present Spitzer 70 and 160 μm observations of the COSMOS Spitzer survey (S-COSMOS). The data processing techniques are discussed for the publicly released products consisting of images and source catalogs. We present accurate 70 and 160 μm source counts of the COSMOS field and find reasonable agreement with measurements in other fields and with model predictions. The previously reported counts for GOODS-North and the extragalactic First Look Survey are updated with the latest calibration, and counts are measured based on the large area SWIRE survey to constrain the bright source counts. We measure an extragalactic confusion noise level of σ_c = 9.4 ± 3.3 mJy (q = 5) for the MIPS 160 μm band based on the deep S-COSMOS data and report an updated confusion noise level of σ_c = 0.35 ± 0.15 mJy (q = 5) for the MIPS 70 μm band.

Additional Information

© 2009 The American Astronomical Society. Received 2009 February 17; accepted 2009 August 15; published 2009 September 22. We thank our colleagues associated with the Spitzer mission who have made these observations possible. 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.

Attached Files

Published - Frayer2009p6233Astron_J.pdf

Accepted Version - 0902.3273.pdf


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August 19, 2023
October 19, 2023