A map of the cosmic background radiation at 3 millimeters

Details A map of the cosmic background radiation at 3 millimeters A map of the cosmic background radiation at 3 millimeters

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...298l...1l&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 298, Nov. 1, 1985, p. L1-L5. Research supported by

Astronomy and Astrophysics

Astrophysics

96

Background Radiation, Cosmic Rays, Relic Radiation, Anisotropy, Balloon-Borne Instruments, Millimeter Waves, Synchrotron Radiation, Thermal Emission

Scientific paper

Data from a series of balloon flights covering both the Northern and Southern Hemispheres, measuring the large angular scale anisotropy in the cosmic background radiation at 3.3 mm wavelength are presented. The data cover 85 percent of the sky to a limiting sensitivity of 0.7 mK per 7 deg field of view. The data show a 50-sigma (statistical error only) dipole anisotropy with an amplitude of 3.44 + or - 0.17 mK and a direction of alpha = 11.2 h + or - 0.1 h, and delta = -6.0 deg + or - 1.5 deg. A 90 percent confidence level upper limit of 0.00007 is obtained for the rms quadrupole amplitude. Flights separated by 6 months show the motion of earth around the sun. Galactic contamination is very small, with less than 0.1 mK contribution to the dipole quadrupole terms. A map of the sky has been generated from the data.

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