COBE

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Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stia...9133192w&link_type=abstract

Texas Symposium on Relativistic Astrophysics, 15th, and ESO-CERN Symposium, 4th, Brighton, England, Dec. 18, 1990, Paper. 22 p.

Astronomy and Astrophysics

Astronomy

Cosmic Background Explorer Satellite, Cosmic Dust, Infrared Astronomy, Microwave Spectra, Sky Surveys (Astronomy), Zodiacal Dust, Cryogenic Temperature, Infrared Astronomy Satellite, Instrument Compensation, Liquid Helium, Nasa Space Programs, Relic Radiation

Scientific paper

Preliminary results are presented from COBE's three observational instruments. These are the FIRAS spectrum experiment, which surveyed over 98 percent of the sky, the IR background experiment, DIRBE which surveyed all of the sky, and the DMR anisotropy experiment. It is found that the cosmic microwave background is very close to a blackbody, with a temperature of 2.735 + or - 0.06 K. The only reliably detected background anisotropy is the 3.3 + or - 0.2 mK-amplitude dipole. The rms quadrupole anisotropy is less than 0.00003 with 95-percent confidence. DIRBE results indicate that the IRAS 60-100 micron diffuse-flux calibrations suffer from gain and offset errors.

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