Measurements of the cosmic microwave background temperature at 1. 47 GHz

• Main Author: Bensadoun, M.J.
• Language: unknown
• Published: 2008
• Subjects: 71 CLASSICAL AND QUANTUM MECHANICS; GENERAL PHYSICS; RELICT RADIATION; TEMPERATURE MEASUREMENT; CALIBRATION; EXPERIMENTAL DATA; FREQUENCY MEASUREMENT; MEASURING METHODS; DATA; ELECTROMAGNETIC RADIATION; INFORMATION; MICROWAVE RADIATION; NUMERICAL DATA; RADIATIONS; Levin; South Pole; Antarc*; Antarctica; South pole
• Online Access: http://www.osti.gov/servlets/purl/7030940; https://www.osti.gov/biblio/7030940; https://doi.org/10.2172/7030940

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 {plus minus} 0.25 K (68% C.L.) measured from White Mountain and 2.26 {plus minus} 0.21 K from the South Pole site. The combined result is 2.27 {plus minus} 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}l% probability) from the 2.74 {plus minus} 0.02,K global average CMB temperature.