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Spectrum of the cosmic background radiation at millimeter wavelengths

Journal Article · · Phys. Rev. Lett.; (United States)
We have measured the spectrum of the cosmic background radiation in five frequency bands extending from 2.3 to 11.0 cm/sup -1/ with a balloon-borne liquid-helium cooled pho- tometer. The photometer compares the flux from the sky to the flux from an internal blackbody at 3.2 K. All five measurements are consistent with temperatures in the range 2.78 +- 0.11 K, which is in good agreement with temperatures measured at lower frequencies. We find no significant deviation from a thermal spectrum.
Research Organization:
Department of Physics, University of California, Berkeley, California 94720
OSTI ID:
5478036
Journal Information:
Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 55:3; ISSN PRLTA
Country of Publication:
United States
Language:
English

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