Point Source Correction And The Galaxy-reduced Map From Wmap 3-yr Data

Details Point Source Correction And The Galaxy-reduced Map From Wmap 3-yr Data Point Source Correction And The Galaxy-reduced Map From Wmap 3-yr Data

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9002c&link_type=abstract

American Astronomical Society, AAS Meeting #211, #90.02; Bulletin of the American Astronomical Society, Vol. 39, p.883

Astronomy and Astrophysics

Astronomy

Scientific paper

Combining the new sources we found using a CMB-independent method in WMAP V- and W-band (61 and 94 GHz) maps with those in the WMAP three-year point source catalog, we find a source correction A = 0.012 ± 0.004 uK2·sr to the CMB power spectrum. More sources are found by adding in the Q-band (41 GHz) map in our search since Q band has a higher SNR. We therefore re-model the source count distribution and report a new estimate of the level of residual contamination due to unresolved point sources. We also present a three-color weighted combination image from the WMAP three-year Q-, V- and W-band maps. The V- and W-band maps are smoothed to match Q-band resolution. The band weights are chosen in such a way as to maintain unity response to the CMB while reducing the galactic light as well as minimizing the variance of the resulting map.
We acknowledge the use of the Legacy Archive for Microwave Background Data Analysis (LAMBDA). Support for LAMBDA is provided by the NASA Office of Space Science.

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