Spitzer Deep Wide-Field Survey Variability Catalog

The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10 square degrees in the Boötes field of the NOAO Deep Wide-Field Survey using the IRAC instrument on the Spitzer Space Telescope. SDWFS, a Spitzer Cycle 4 Legacy project, occupies a unique position in the area-depth survey space defined by other Spitzer surveys. The four epochs that make up SDWFS permit - for the first time - the selection of infrared-variable and high proper motion objects over a wide field on timescales of years. Because of its large survey volume, SDWFS is sensitive to galaxies out to z ~ 3 with relatively little impact from cosmic variance for all but the richest systems. The SDWFS data sets will thus be especially useful for characterizing galaxy evolution beyond z ~ 1.5.\n\nThe SDWFS Variability Catalog presents variability information for all SDWFS sources with a 5-sigma detection at 3.6 microns. For more details, see Kozlowski et al. (2010).

Data and Resources

Additional Info

Field Value
Maintainer IRSA Support
Last Updated September 14, 2026, 19:24 (UTC)
Created April 1, 2025, 13:07 (UTC)
accessLevel public
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harvest_source_title Science Discovery Engine
identifier ivo://irsa.ipac/spitzer/catalog/sdwfs/sdwfs-var
landingPage ivo://irsa.ipac/spitzer/catalog/sdwfs/sdwfs-var
license https://www.usa.gov/government-works
modified 2026-09-07T22:15:59Z
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publisher NASA/IPAC Infrared Science Archive
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