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

Abstract

view Abstract Citations (38) References (22) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Brightness Temperature of the South Celestial Pole and the Temperature of the Cosmic Background Radiation Measured at 36.6 and 12 Centimeter Wavelength Sironi, G. ; Bonelli, G. ; Limon, M. Abstract The absolute temperature of the sky around the south celestial pole has been measured at v = 0.82 GHz (λ = 36.6 cm) and v = 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^deg^ x 23^deg^. 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 ({TAU}_sky_=2.58+/-0.34 K, T^th^_CBR_=2.50+/-0.34K) 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 ({TAU}_sky_=5.7+/-1.6 K, {TAU}^th^_CBR_=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. Publication: The Astrophysical Journal Pub Date: September 1991 DOI: 10.1086/170456 Bibcode: 1991ApJ...378..550S Keywords: 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; Space Radiation; COSMIC BACKGROUND RADIATION; RADIO SOURCES: EXTENDED full text sources ADS |