Confusion-limited extragalactic source survey at 4. 755 GHz. I. Source list and areal distributions

Journal Article · Tue Jul 01 04:00:00 EDT 1980 · Astron. J.; (United States)

OSTI ID:5297364

Ledden, J E; Broderick, J J; Condon, J J; Brown, R L

A confusion-limited 4.755-GHz survey covering 0.00 956 sr between right ascensions 07/sup h/05/sup m/ and 18/sup h/ near declination +35/sup 0/ has been made with the NRAO 91-m telescope. The survey found 237 sources and is complete above 15 mJy. Source counts between 15 and 100 mJy were obtained directly. The P(D) distribution was used to determine the number counts between 0.5 and 13.2 mJy, to search for anisotropy in the density of faint extragalactic sources, and to set a 99%-confidence upper limit of 1.83 mK to the rms temperature fluctuation of the 2.7-K cosmic microwave background on angular scales smaller than 7.3 arcmin. The discrete-source density, normalized to the static Euclidean slope, falls off sufficiently rapidly below 100 mJy that no new population of faint flat-spectrum sources is required to explain the 4.755-GHz source counts.

• Research Organization: Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
• OSTI ID: 5297364
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 85:7; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
COSMIC RADIATION
COSMIC RADIO SOURCES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
INTERFEROMETRY
IONIZING RADIATIONS
MICROWAVE RADIATION
RADIATIONS
SPATIAL DISTRIBUTION