engleski

The VLA-COSMOS Survey. IV. Deep Data and Joint Catalog

In the context of the VLA-COSMOS Deep project, additional VLA A array observations at 1.4 GHz were obtained for the central degree of the COSMOS field and combined with the existing data from the VLA-COSMOS Large project. A newly constructed Deep mosaic with a resolution of 2farcs5 was used to search for sources down to 4σ with 1σ ≈ 12 μJy beam-1 in the central 50' × 50'. This new catalog is combined with the catalog from the Large project (obtained at 1farcs5 × 1farcs4 resolution) to construct a new Joint catalog. All sources listed in the new Joint catalog have peak flux densities of >=5σ at 1farcs5 and/or 2farcs5 resolution to account for the fact that a significant fraction of sources at these low flux levels are expected to be slightly resolved at 1farcs5 resolution. All properties listed in the Joint catalog, such as peak flux density, integrated flux density, and source size, are determined in the 2farcs5 resolution Deep image. In addition, the Joint catalog contains 43 newly identified multi-component sources.

cosmology: observations; radio continuum: galaxies; surveys

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