Mathematics – Probability
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phdt........13b&link_type=abstract
Ph.D. Thesis California Univ., Berkeley. Lawrence Berkeley Lab.
Mathematics
Probability
Background Radiation, Cosmic Noise, Frequency Measurement, Relic Radiation, Temperature Measurement, Calibrating, Microwave Radiometers, Thermodynamics
Scientific paper
A radiofrequency-gain total power radiometer measured the intensity of the cosmic microwave background (CMB) at a frequency of 1.47 GHz (20.4 cm wavelength) from White Mountain, California, in September 1988 and from the South Pole, Antarctica, in December 1989. The CMB thermodynamic temperature, TCMB, is 2.27 +/- 0.25 K (68 percent C.L.) measured from White Mountain and 2.26 +/- 0.21 K from the South Pole site. The combined result is 2.27 +/- 0.19 K. The correction for galactic emission has been derived from scaled low-frequency maps and constitutes the main source of error. The atmospheric signal is found by extrapolation from zenith scan measurements at higher frequencies. The result is consistent with previous low-frequency measurements, including a measurement at 1.41 GHz (Levin et al. 1988) made with an earlier version of this instrument. The result is approximately 2.5 sigma (approximately 1 percent probability) from the 2.74 +/- 0.02 K global average CMB temperature.
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