A final non-redundant catalogue for the 7C 151-MHz survey

• Published in: Monthly notices of the Royal Astronomical Society Vol. 382; no. 4; pp. 1639 - 1642
• Main Authors: Hales, S. E. G., Riley, J. M., Waldram, E. M., Warner, P. J., Baldwin, J. E.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 21-12-2007; Blackwell Science; Oxford University Press
• Subjects: Alternatives; Astronomy; catalogues; Earth, ocean, space; Exact sciences and technology; radio continuum: general; Stars & galaxies; surveys; surveys; radio continuum: general; catalogues; Continuum; Astronomical catalogues; Galactic planes
• ISSN: 0035-8711; 1365-2966
• DOI: 10.1111/j.1365-2966.2007.12392.x

We present a final unified catalogue for the 7C survey at 151 MHz with resolution 70 × 70 cosec(δ) arcsec2. This has been constructed by amalgamating the existing catalogues derived from individual fields imaged at this resolution and eliminating redundancy in regions of mutual overlap. This is a non-trivial procedure because the flux in multiple-component sources may be fitted differently on alternative images, owing, for example, to differences in local noise and beam distortion. The final catalogue lists 43683 sources over an area of about 1.7 sr. Separate final catalogues have been published for the 7C Galactic Plane survey (7CG) and the lower-resolution survey of the low-declination strip 9h < RA < 16h, 20° < Dec < 35°.