{"@type": "dcat:Dataset", "accessLevel": "public", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "IRSA Support", "hasEmail": "mailto:irsasupport@ipac.caltech.edu"}, "description": "The Spitzer Deep, Wide-Field Survey (SDWFS) is a four-epoch infrared survey of 10 square degrees in the Bo\u00f6tes 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).", "distribution": [{"@type": "dcat:Distribution", "downloadURL": "https://irsa.ipac.caltech.edu/data/SPITZER/SDWFS/gator_docs/sdwfs_var_colDescriptions.html", "format": "HTML", "mediaType": "text/html"}, {"@type": "dcat:Distribution", "downloadURL": "https://irsa.ipac.caltech.edu/SCS?table=sdwfs_var&", "format": "BIN", "mediaType": "application/octet-stream"}], "identifier": "ivo://irsa.ipac/spitzer/catalog/sdwfs/sdwfs-var", "keyword": ["__"], "landingPage": "ivo://irsa.ipac/spitzer/catalog/sdwfs/sdwfs-var", "license": "https://www.usa.gov/government-works", "modified": "2026-04-06", "programCode": ["026:000"], "publisher": {"@type": "org:Organization", "name": "NASA/IPAC Infrared Science Archive"}, "theme": ["Astrophysics"], "title": "Spitzer Deep Wide-Field Survey Variability Catalog"}