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

Abstract

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.

arXiv comment6 pages, 1 figure. Accepted for publication in A&A; erroneous entries in the DEC of the MRC input file detected; the article is changed accordingly

References in corpus (3)

• SUMSS: A Wide-Field Radio Imaging Survey of the Southern Sky. II. The Source Catalogue
• A Sample of Ultra Steep Spectrum Sources Selected from the Westerbork In the Southern Hemisphere (WISH) survey
• A method for determining radio continuum spectra, and its application to large surveys

Cited by in corpus (13)

• Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
• The SPECFIND V2.0 catalogue of radio cross-identifications and spectra. SPECFIND meets the Virtual Observatory
• A Technique for Primary Beam Calibration of Drift-Scanning, Wide-Field Antenna Elements
• Swift/XRT observations of unidentified INTEGRAL/IBIS sources
• Quasi-simultaneous multi-frequency observations of inverted-spectrum GPS candidate sources
• A Flux Scale for Southern Hemisphere 21cm EoR Experiments
• The AGN nature of three INTEGRAL sources: IGR J18249-3243, IGR J19443+2117 and IGR J22292+6647
• A broad-band spectral analysis of eight radio loud type 1 AGN selected in the hard X-ray band
• The precision and accuracy of early Epoch of Reionization foreground models: comparing MWA and PAPER 32-antenna source catalogs
• Analysis of the RC catalog sample in the region overlapping with the regions of the FIRST and SDSS surveys: I. Identification of sources with the VLSS, TXS, NVSS, FIRST, and GB6 catalogs
• Powerful Radio Sources in the Southern Sky. I. Optical Identifications
• On the identification of the Fermi/LAT source 0FGL J2001.0+4352 with a BL Lac
• RadioSED I: Bayesian inference of radio SEDs from inhomogeneous surveys