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Product Name
Point Source Catalog


This is a catalog of 208 point sources detected in the WMAP sky maps independently from any previous surveys. The sources listed in the catalog were detected as ≥ 5 sigma peaks in WMAP maps that have been weighted by the square root of the number of observations and optimally filtered for point source detection. The position of each source is obtained by fitting a Gaussian profile plus a baseline to each detected peak. Of the 208 detected sources, 203 have one or more known counterparts; the 5 sources that do not are very close to the detection threshold and are thought to be spurious. The catalog lists the following parameters for each source:

  • Position
  • Brightness in the 5 WMAP bands
  • Spectral index
  • Counterpart (if known)

More details can be found in:

"First Year Wilkinson Microwave Anisotropy Probe (WMAP) Results:
Foreground Emission", Bennett, et al., 2003

WMAP Explanatory Supplement

Release Notes:

27 Jan 2003:
Initial release of V1.0.

28 Jul 2003:
Release of Version 1.1. Three columns were added to the catalog: a WMAP source
id number, a flux spectral index computed from the WMAP data, and the
uncertainty of that spectral index. A revised processing algorithm
affected the entries for four sources (source ids 82, 101, 138 &
181): fluxes are now quoted at some frequencies for which none had
been listed in version 1.0. The 5 GHz counterpart listed for WMAP
source 138 (Fornax A) was changed to its Kuhr catalog id.

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