Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396....3l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 396, no. 1, Sept. 1, 1992, p. 3-9. Research supported by Fondazione Angelo
Astronomy and Astrophysics
Astrophysics
28
Black Body Radiation, Brightness Temperature, Relic Radiation, Temperature Measurement, Atmospheric Correction, Error Analysis, Instrument Compensation, Magnetic Poles, Southern Hemisphere
Scientific paper
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.
Bensadoun Marc
Bersanelli Marco
de Amici Giovanni
Kogut Alan
Levin Sergey
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