A measurement of the cosmic microwave background temperature at 7. 5 GHz

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/171692· OSTI ID:6937302

Levin, S; Bensadoun, M; Bersanelli, M; De Amici, G; Kogut, A; Limon, M; Smoot, G ^[1]

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1. California, University (United States) Lawrence Berkeley Laboratory, Berkeley, CA (United States) JPL, Pasadena (United States) CNR, Istituto per Ricerche in Fisica Cosmica e Tecnologie Relative, Milan (Italy) NASA, Goddard Space Flight Center, Greenbelt, MD (United States)

The temperature of the cosmic microwave background (CMB) radiation at a frequency of 7.5 GHz (4 cm wavelength) is measured, obtaining a brightness temperature of T(CMB) = 2.70 +/- 0.08 K (68 percent confidence level). The measurement was made from a site near the geographical South Pole during the austral spring of 1989 and was part of an international collaboration to measure the CMB spectrum at low frequencies with a variety of radiometers from several different sites. This recent result is in agreement with the 1988 measurement at the same frequency, which was made from a different site with significantly different systematic errors. The combined result of the 1988 and 1989 measurements is 2.64 +/- 0.06 K. 11 refs.

• OSTI ID: 6937302
• Journal Information: Astrophysical Journal; (United States), Vol. 396:1; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
RELICT RADIATION
TEMPERATURE MEASUREMENT
CORRECTIONS
ERRORS
INTERNATIONAL COOPERATION
SOUTHERN HEMISPHERE
COOPERATION
EARTH PLANET
ELECTROMAGNETIC RADIATION
MICROWAVE RADIATION
PLANETS
RADIATIONS
661300* - Other Aspects of Physical Science- (1992-)