http://arxiv.org/abs/1603.03085
This is the second of two papers describing the observations and source catalogues derived from sensitive 3 GHz images of the Lockman Hole North using the Karl G. Jansky Very Large Array. We describe the reduction and cataloguing process, which yielded an image with 8 arcsec resolution and instrumental noise of $\sigma_{\rm n}=1.01\,\mu$Jy beam$^{-1}$ rms (before primary beam corrections) and a catalogue of sources detected above $5\sigma_{\rm n}$. We include details of how we estimate source spectral indices across the 2 GHz VLA bandwidth, finding a median index of -0.76. We present a source count derived from the catalogue. We show a traditional count estimate compared with a completely independent estimate made via a P(D) confusion analysis, and find very good agreement. Cross-matches of the catalogue with optical, infrared, radio, and redshift catalogues are presented. The optical and infrared colours and AGN selection criteria indicates that 10 to 50 per cent of the sources with matches are classified as optical AGN, depending on the criteria used, with the majority of sources having radio emission dominated by the star-formation process.
T. Vernstrom, D. Scott, J. Wall, et. al.
Fri, 11 Mar 16
6/59
Comments: 14 pages, 7 tables, 13 figures. Submitted to MNRAS
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