The brightness temperature of the south celestial pole and the temperature of the cosmic background radiation measured at 36.6 and 12 centimeter wavelength

Details The brightness temperature of the south celestial pole and the temperature of the cosmic background radiation measured at 36.6 and 12 centimeter wavelength The brightness temperature of the south celestial pole and the temperature of the cosmic background radiation measured at 36.6 and 12 centimeter wavelength

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..550s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 10, 1991, p. 550-556. Research supported by Italian Antarctic Pr

Astronomy and Astrophysics

Astronomy

29

Background Radiation, Brightness Temperature, Centimeter Waves, Radio Sources (Astronomy), Sky Radiation, Temperature Measurement, Antarctic Regions, Microwave Antennas, Radio Astronomy, Radiometers, Sky Surveys (Astronomy), Cosmic Background Radiation, Radio Sources: Extended

Scientific paper

The absolute temperature of the sky around the south celestial pole has been measured at ν = 0.82 GHz (λ = 36.6 cm) and ν = 2.5 GHz (λ = 12 cm) during an observing campaign from the Amundsen Scott Base at the South Pole in 1989 December. The antennas had an angular resolution of 18° × 23°. The measured temperatures of the sky have been used to determine the temperature of the cosmic background radiation in a frequency region where large deviations from a pure Planckian spectrum are expected.
The results at 2.5 GHz (Tsky = 2.58±0.34 K, TthCBR = 2.50±0.34 K) are fully consistent with the results of previous observations at the same frequency. At 0.82 GHz an undesired level of the system attenuation gave large error bars (Tsky = 5.7±1.6 K, TthCBR = 2.7±1.6 K). In spite of that limitation we report the 0.82 GHz results because no data at the same or nearby frequencies can be found in the literature.

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