Deep 3-GHz observations of the Lockman Hole North with the Very Large Array - II. Catalogue and µJy source properties

T. Vernstrom, Douglas Scott, J. V. Wall, J. J. Condon, W. D. Cotton, K. I. Kellermann, R. A. Perley

Research output: Contribution to journalArticlepeer-review

23 Citations (Web of Science)

Abstract

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 (VLA). We describe the reduction and cataloguing process, which yielded an image with 8 arcsec resolution and instrumental noise of sigma(n) = 1.01 mu Jy beam(-1) rms (before primary-beam corrections) and a catalogue of 558 sources detected above 5 sigma(n). We include details of how we estimate source spectral indices across the 2-GHz VLA bandwidth, finding a median index of -0.76 +/- 0.04. Stacking of source spectra reveals a flattening of spectral index with decreasing flux density. 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 X-ray, optical, infrared, radio, and redshift catalogues are also presented. The X-ray, optical and infrared data, as well as active galactic nuclei (AGN) selection criteria allow us to classify 10 per cent as radio-loud AGN, 28 per cent as radio-quiet AGN, and 58 per cent as star-forming galaxies, with only 4 per cent unclassified.

Original languageEnglish
Pages (from-to)2934-2949
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Volume462
Issue number3
DOIs
Publication statusPublished - 1 Nov 2016
Externally publishedYes

Fingerprint

Dive into the research topics of 'Deep 3-GHz observations of the Lockman Hole North with the Very Large Array - II. Catalogue and µJy source properties'. Together they form a unique fingerprint.

Cite this