[57.09] The VLA Low-frequency Sky Survey (VLSS)

AAS 203rd Meeting, January 2004
Session 57 Source Surveys
Poster, Tuesday, January 6, 2004, 9:20am-6:30pm, Hanover Hall

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[57.09] The VLA Low-frequency Sky Survey (VLSS)

N.E. Kassim, W.M. Lane, A.S. Cohen, T.J.W. Lazio (NRL), R.A. Perley, W.D. Cotton, J.J. Condon (NRAO), W.C. Erickson (UMD)

We present information on the ongoing VLA Low-frequency Sky Survey(VLSS, formerly known as 4MASS). The VLSS will map an area of 9.1 sr covering the entire sky above a declination of -30 degrees, at a frequency of 74 MHz or 4 meter wavelength, with an unprecedented combination of sensitivity and resolution at this low frequency. The observational challenges at this wavelength include radio frequency interference (RFI), ionospheric phase distortions, and a large field of view filled with sources. These challenges have been surmounted by a variety of new algorithms. The principle data products from the survey will be a set of publicly available images and a catalog of approximately 9 X 10⁴ sources. From the catalog, statistically useful samples of extra-galactic and Galactic objects, such as high redshift radio galaxies, galaxy clusters and supernova remnants, can be assembled for further study. The observations will be roughly 50% complete by January 2004. Data products and more information are available on our website (URL:http://lofar.nrl.navy.mil/VLSS/).

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