Abstract
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 language | English (US) |
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Pages (from-to) | 1974-1989 |
Number of pages | 16 |
Journal | Astronomical Journal |
Volume | 128 |
Issue number | 5 |
DOIs | |
State | Published - Nov 2004 |
Keywords
- Radio continuum: galaxies
- Surveys
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science