WISH - Westerbork in the Southern Hemisphere (WISH) Source Catalog
The correlation with the NVSS was also used to construct a sample of faint Ultra Steep Spectrum sources (Table 2 in the reference paper, available at http://cdsarc.u-strasbg.fr/ftp/cats/VIII/69A/uss.dat.gz). This sample is aimed at increasing the number of known high redshift radio galaxies to allow detailed follow-up studies of these massive galaxies and their environments in the early Universe.
WISH is a collaboration between the Netherlands Foundation for Research in Astronomy (NFRA/ASTRON) and the Leiden Observatory. Carlos De Breuck, Yuan Tang, Ger de Bruyn, Huub Rottgering, Wil van Breugel, and Roeland Rengelink. For more information, see the WENSS home page at http://www.astron.nl/wow/testcode.php?survey=1.
The Westerbork in the Southern Hemisphere 9WISH) Survey De Breuck C., Tang Y., de Bruyn A.G., Rottgering H., van Breugel W. <Astron. Astrophys. 394, 59 (2002)> =2002A&A...394...59D
The position-based source designation. This is close to the form recommended by the CDS Dictionary of Nomenclature of Celestial Objects, viz., 'WISH BHHMM.m-DDMMA', where the numerical part of the name is the truncated B1950.0 position of the radio source (to 0.1 minutes of time in RA and 1 arcminute in Dec) and the letter suffixes are used to identify individual components of multi-component sources. The CDS further suggested adding a further lower-case suffix 'a', 'b' or 'c' to the names of sources with multiple measurements, but the HEASARC has retained this as a separate parameter (obs_index) since it is an attribute of the observation rather than of the actual source.
This parameter is set to 'a', 'b' or 'c' to identify sources which have multiple flux density measurements. The multiple entries provide variability information. Some double entries in the same field are however due to problems in the source-fitting algorithm, and are marked with a 'P' in the value of the source_flag parameter.
The Right Ascension of the radio source in the selected equinox. This was taken from the J2000.0 source position in the original reference table which was specified to a precision of 0.01 seconds of time.
The Declination of the radio source in the selected equinox. This was taken from the J2000.0 source position in the original reference table which was specified to a precision of 0.1 arcseconds.
The Galactic Longitude of the radio source.
The Galactic Latitude of the radio source.
The radio source type, as follows:
S = Single component source. M = Multicomponent source. C = Component of a multicomponent source. E = Extended source (more than four components).
This flag parameter is set to 'P' (in the original catalog an asterisk was used) to indicate that there were problems in fitting the source. In the case of such problems, the source parameters were obtained using 'aperture' integration.
The peak flux density of the radio source at 352 MHz, in mJy/beam.
The integrated flux density of the radio source at 352 MHz, in mJy.
The fitted major axis of the radio source, in arcseconds. The mean ratio between the fitted major and minor axes of the WISH sources is 5.00, reflecting the high ellipticity of the synthesized beam.
The ftted minor axis of the radio source, in arcseconds.
The fitted position angle of the radio source, in degrees.
The local RMS-noise level in the vicinity of the source, in mJy/beam.
The WISH frame from which the source information was obtained. The positions of the mosaic centers and the flux density correction factors of the 49 frames comprising the WISH are listed in Table 1 of the reference paper.