Astronomy and Astrophysics – Astronomy
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89..610c&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, May 1984, p. 610-617.
Astronomy and Astrophysics
Astronomy
68
Astronomical Maps, Density Distribution, Radio Sources (Astronomy), Space Density, Radiant Flux Density, Radio Astronomy, Random Noise, Relic Radiation, Statistical Distributions, Very Large Array (Vla)
Scientific paper
A single primary-beam area centered on the ascension 08h52m15s, declination +17 deg 16 arcmin field has been observed for 4 x 12 hr with the Very Large Array at 1.46 GHz. The resultant map has an rms noise level of 13.3 micro-Jy and yields a reliable list of sources with map peak flux densities over 84 micro-Jy. The use of the Cambridge automatic plate measuring machine to make position-coincidence optical identifications is described. Direct source counts in the flux-density range 84-1000 micro-Jy are obtained, and the P(D) distribution of the central portion of the map is used to estimate the sky density of sources as faint as 30 micro-Jy. An upper limit to the rms temperature fluctuation in the cosmic microwave background on angular scales of about 19 arcsec is obtained and compared with predictions from models of star formation at early epochs.
Condon James J.
Mitchell Kenneth J.
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