The precision of large radio continuum source catalogues- An application of the SPECFIND tool

Details The precision of large radio continuum source catalogues- An application of the SPECFIND tool The precision of large radio continuum source catalogues- An application of the SPECFIND tool

2005-03-30

arxiv.org/abs/astro-ph/0503663v2

Astronomy and Astrophysics

Astrophysics

6 pages, 1 figure. Accepted for publication in A&A; erroneous entries in the DEC of the MRC input file detected; the article i

Scientific paper

10.1051/0004-6361:20052649

The accuracy in position and flux density of 19 large radio continuum source catalogues has been determined using SPECFIND, a new tool recently made available through the CDS. The ~67000 radio continuum spectra with three or more frequencies produced by SPECFIND were used to cross-correlate sources from different catalogues and to calculate offsets in right ascension and declination in the various catalogues with respect to the positions given in the NRAO VLA Sky Survey (NVSS) catalogue, which was adopted as a reference. The flux densities reported in the catalogues were compared to those predicted by the composite spectra, enabling us to assess the quality of the flux density calibration of the different catalogues.

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