The VLA-cosmos survey. I. Radio identifications from the pilot project

E. Schinnerer, C. L. Carilli, N. Z. Scoville, M. Bondi, P. Ciliegi, P. Vettolani, O. Le Févre, A. M. Koekemoer, F. Bertoldi, C. D. Impey

Research output: Contribution to journalArticlepeer-review

67 Scopus citations


We present a catalog of 246 radio sources found in the central 1° of the COSMOS field at 1.4 GHz. The VLA pilot project data have a resolution of 1″.9 × 1″.6 and an rms noise limit of ∼25-100 μJy beam -1 covering 0.837 deg 2. About 20 radio sources are clearly extended, and most of them appear to be double-lobed radio galaxies. We find evidence for a cluster of seven radio galaxies with an extent of ∼10′ southeast of the COSMOS field center. This VLA pilot project was undertaken to demonstrate the feasibility of wide-field mosaicking at 2″ resolution at 1.4 GHz using the VLA in its A configuration. The seven-point mosaic data were used to develop the techniques necessary for reduction and analysis. These data will provide the initial astrometric frame for the optical (ground-and space-based) data of the COSMOS 2 deg 2 survey. In addition, they demonstrate the feasibility of obtaining deep (rms ∼ a few microjanskys) radio imaging of this field at 1.4 GHz, since the brightest radio-emission peak detected within the area covered has a flux density of 13 mJy beam -1 and no strong sidelobes from sources surrounding the COSMOS field were detected. Comparison of the number counts with other deep radio surveys shows that the COSMOS field is a representative deep field in the radio domain.

Original languageEnglish (US)
Pages (from-to)1974-1989
Number of pages16
JournalAstronomical Journal
Issue number5
StatePublished - Nov 2004


  • Radio continuum: galaxies
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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