Two Low Frequency Surveys of Radio Galaxies
Journal article preprint
NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV
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High resolution, low frequency observations are very efficient for surveying radio galaxies because of 1 the wide field of view and 2 the bias toward steep spectrum lobe dominated emission. Here I present preliminary results from two ongoing low frequency radio surveys the 4 Meter All Sky Survey 4MASS and the low frequency counterpart to the XMM-Large Scale Structure XMM-LSS survey. 4MASS is an NRL-NRAO project to survey the entire sky above delta -20 degrees at 74 MHz with a resolution of 1.3. So far, 0.66 steradians have been observed and over 5000 objects identified, with the steep spectrum objects being followed up in a search for high redshift radio galaxies. The XMM-Large Scale Structure XMM-LSS survey is a major project underway to map the large scale structure of the universe out to cosmological distances. We are conducting a survey at both 325 MHz and 74 MHz in the 8 x 8 square degree XMM-LSS region. The radio counterpart to this deep X-ray survey is designed to explore the relation of the large scale structure to the location and properties of extragalactic radio sources. Statistical results of preliminary analysis of these two surveys are presented.