WMAPCMBFPS - WMAP 7-Year CMB-Free QVW Point Source Catalog

Overview

The Wilkinson Microwave Anisotropy Probe (WMAP) is designed to produce all-sky maps of the cosmic microwave background (CMB) anisotropy. The WMAP 7-Year CMB-Free Point Source Catalog contained herein has information on point sources in three frequency bands (41, 61 and 94 GHz, also known as the Q, V, and W bands, respectively) based on data from the first 7 years of the WMAP sky survey from 10 Aug 2001 to 9 Aug 2008, inclusive. The CMB-free method identified 417 point sources in a linear combination map formed from the 41, 61 and 94 GHz band maps using weights such that CMB fluctuations are removed and flat-spectrum point sources are retained. An alternative 5-band search technique (also used in the first-year, 3-year and 5-year analyses) applied to the 7-year data finds 471 point sources: this list of sources is available in Browse as the WMAPPTSRC table and has information on the point sources found by this technique in the five frequency bands from 23 to 94 GHz.

Catalog Bibcode

2011ApJS..192...15G

References

Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic
Foreground Emission
   Gold B., Odegard N., Weiland J.L., Hill R.S., Kogut A., Bennett, C.L.,
   Hinshaw, G., Chen X., Dunkley J., Halpern M., Jarosik N., Komatsu, E.,
   Larson D., Limon M., Meyer S.S., Nolta M.R., Page L., Smith K.M.,
   Spergel D.N., Tucker G.S., Wollack E., Wright E.L.
  <Astrophys. J. Suppl., 192, 15 (2011)>
  =2011ApJS..192...15G

Provenance

This table was created by the HEASARC in June 2010 based on an electronic version of Table 6 from the 2010 ApJS paper whuch was obtained from the LAMBDA web site, the file http://lambda.gsfc.nasa.gov/data/map/dr4/dfp/ptsrc/wmap_ptsrc_catalog_cmb_free_p4_7yr_v4.txt.

HEASARC Implementation

The HEASARC has converted all flux densities from the Jy units given in the original table into the mJy units which it uses in its tables for radio- and mm-band flux densities.

Parameters

Name
The name of the corresponding point source in the 5-year 5-band WMAP Point Source Catalog (Wright et al. 2009, ApJS, 180, 283), e.g., 'WMAP JHHMM+DDMM' or in the 5-year WMAP QVW Catalog (Chen and Wright 2009, ApJ, 694, 222), e.g., 'QVW JHHMM+DDMM', if there is such a source present within 15 arcminutes of this position. In a few cases the source identifications are taken from the 3-year catalog.

Alt_Name
The name of the corresponding 5-GHz source, if there is such a source within 15 arcminutes of this position, found from correlating against the GB6, PMN and Kuehr et al. (1981, A&AS, 45, 367) catalogs (the HEASARC Browse tables GB6, PMN and KUEHR, respectively). Sources from the Kuehr Catalog have a '1Jy' prefix, notice. When a 5-GHz source identification is not available, the name of the closest NVSS 1.4-GHz source is given.

RA
The Right Ascension of the WMAP source in the selected equinox. The RA was given in J2000.0 coordinates to a precision of 0.001 degrees (3.6 arcseconds) in the original table.

Dec
The Declination of the WMAP source in the selected equinox. The Declination was given in J2000.0 coordinates to a precision of 0.001 degrees (3.6 arcseconds) in the original table

LII
The Galactic Longitude of the WMAP source.

BII
The Galactic Latitude of the WMAP source.

NED_Type
The object type of the optical identification of the WMAP source found in the NASA Extragalactic Database (NED), where the type codes are as follows:

  G     = Galaxy
  RadioS= Radio Source
  QSO   = Quasar
  SNR   = Supernova Remnant
  Gpair = Galaxy Pair
  PN    = Planetary Nebula

Flux_41_GHz
The Q-band (41 GHz) flux density of the WMAP source, in mJy. The flux densities were specified to a precision of 0.1 Jy (100 mJy) in the original table.

Flux_41_GHz_Error
The uncertainty in the Q-band (41 GHz) flux density of the WMAP source, in mJy.

Flux_61_GHz
The V-band (61 GHz) flux density of the WMAP source, in mJy. The flux densities were specified to a precision of 0.1 Jy (100 mJy) in the original table.

Flux_61_GHz_Error
The uncertainty in the V-band (61 GHz) flux density of the WMAP source, in mJy.

Flux_94_GHz
The W-band (94 GHz) flux density of the WMAP source, in mJy. The flux densities were specified to a precision of 0.1 Jy (100 mJy) in the original table.

Flux_94_GHz_Error
The uncertainty in the W-band (94 GHz) flux density of the WMAP source, in mJy.

Wmap_5GHz_Offset
The angular distance between the QVW source and its 5-GHz counterpart, in arcminutes.

Source_Flag
This parameter can contain the following flag codes:

   a = Indicates this source has multiple possible identifications.
       The source listed here is the brightest one or the one with smallest
       offset when fluxes are comparable.

  b = The source is associated with a different 5 GHz source than
      noted in the WMAP five-year point source catalog.

  c = Indicates the source is in the three-year WMAP point source
      catalog, but not in the five-year catalog.

  d = The source position is fitted to the local maximum of a 5-pixel
      by 5-pixel neighborhood as there are two bright pixels within one
      Q-band beam, both of which are the brightest in their 3-pixel by
      3-pixel neighborhood.

Class
The HEASARC Browse object classification, based on the value of the ned_type parameter.

Contact Person

Questions regarding the WMAPCMBFPS database table can be addressed to the HEASARC User Hotline.

A service of the Astrophysics Science Division at NASA/GSFC and the High Energy Astrophysics Division of the Smithsonian Astrophysics Observatory (SAO)

HEASARC Director: Dr. Alan P. Smale
HEASARC Associate Director: Dr. Roger Brissenden
NASA Official: Phil Newman
Web Curator: Meredith Gibb
Last Modified: 8-Feb-2011

Page Author: Browse Software Development Team
Last Modified: 8-Feb-2011