Rocket measurement of the cosmic-background-radiation mm-wave spectrum

Details Rocket measurement of the cosmic-background-radiation mm-wave spectrum Rocket measurement of the cosmic-background-radiation mm-wave spectrum

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvl..65..537g&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 65, July 30, 1990, p. 537-540.

Physics

129

Compton Effect, Radiation Spectra, Red Shift, Relic Radiation, Rocket-Borne Instruments, Big Bang Cosmology, Liquid Cooling, Liquid Helium, Plancks Constant

Scientific paper

This paper reports the most precise constraint to date on the spectrum of the cosmic background radiation (CBR), obtained from measurements made with a liquid-helium-cooled spectrometer carried above the atmosphere on a rocket. The spectrum is very well fitted by a Planck function of temperature T = 2.736 K. The scatter of the equivalent temperature in the band 3-16/cm is + or - 10 mK, about 1/3 percent of the mean, whereas the estimated overall accuracy of the mean temperature is + or - 17 mK. These results are inconsistent with a previously reported excess IR intensity in the CBR but are in good agreement with COBE results reported by Mather et al. (1990).

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