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Observations of Large-Scale Anisotropy in the 3 K Background Radiation

Published online by Cambridge University Press:  14 August 2015

E. K. Conklin
E. K. Conklin*
Affiliation:
Stanford University, Calif., U.S.A.

Abstract

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Measurements of the background radiation were made at 8000 MHz with a beamwidth of 15 deg. Two antennas were used, arranged such that the equipment recorded the temperature difference between points five hours apart in right ascension and at declination + 32°. Data were taken only at night and at 3800 m altitude, in order to reduce systematic effects as much as possible. Two observing runs six months apart were combined; after subtracting Galactic non-thermal radiation, the remainder shows a significant dipole anisotropy, a possibly significant quadrupole anisotropy, and no detectable variations of smaller angular size: (Table I.)