Wilkinson Microwave Anisotropy Probe

This is a catalog of 471 point sources detected in the seven year 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 471 detected sources, 444 have one or more possible 5 GHz counterparts. Of the sources with no 5 GHz identification, some are close to the detection threshold and may be spurious. The catalog lists the following parameters for each source:

Cols 1 -- 2	Right Ascension and Declination (2000)
Cols 3 -- 4	Galactic Longitude and Latitude
Cols 5 -- 9	WMAP Flux (Jy)
Cols 10 -- 14	Flux Error (Jy)
Cols 15 -- 16	5 Ghz Identification
Col 17	Flag for multiple 5 GHz identifications
Col 18	WMAP DR1 Identification Number
Col 19	WMAP Spectral Index
Col 20	WMAP Spectral Index Error

The CMB-free method identifies 417 point sources in a linear combination map formed from Q, V, and W band maps using weights such that CMB fluctuations are removed and flat-spectrum point sources are retained. Source fluxes are then estimated by integrating the Q, V, and W temperature maps within 1.25 degrees of each source position and applying a correction for Eddington bias due to noise. The catalog lists the following parameters for each source:

Cols 1 -- 2	Right Ascension and Declination (2000) (deg)
Cols 3	Source Id
Cols 4	Optical Identification from NASA Extragalactic Database
Cols 5 -- 6	WMAP Q-band Flux and error (Jy)
Cols 7 -- 8	WMAP V-band Flux and error (Jy)
Cols 9 -- 10	WMAP W-band Flux and error (Jy)
Cols 11 -- 12	5 Ghz Identification
Col 13	Distance to the 5 GHz counterpart
Col 14	Source note

Additional Information

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission, B. Gold, et.al (2010).
• WMAP Seven Year Explanatory Supplement

• "Extragalactic Point Source Search in Five-Year WMAP 41, 61, and 94 Ghz Maps", Chen, X., and Wright, E.L., 2009, ApJ, 694, 222

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