The dipole observed in the {ital COBE} DMR 4 year data
- Observatoire de Strasbourg, 67000 Strasbourg (France)
- Universidad Carlos III, Madrid (Spain)
- Lawrence Berkeley Laboratory, Space Sciences Laboratory, and Center for Particle Astrophysics, Building 50-205, University of California, Berkeley, California 94720 (United States)
- Hughes STX Corporation, Laboratory for Astronomy and Solar Physics, Code 685, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)
- University of California Santa Barbara Physics Department, Santa Barbara, California 93106 (United States)
The largest anisotropy in the cosmic microwave background (CMB) is the {approx_equal}3 mK dipole assumed to be due to our velocity with respect to the CMB. Using the 4 year data set from all six channels of the {ital COBE} Differential Microwave Radiometers (DMR), we obtain a best-fit dipole amplitude 3.358{plus_minus}0.001{plus_minus}0.023 mK in the direction ({ital l},{ital b})=(264.31{degrees}{plus_minus}0.04{degree}{plus_minus}0.16{degree} +48.05{degrees}{plus_minus}0.02{degree}{plus_minus}0.09{degree}), where the first uncertainties are statistical and the second include calibration and combined systematic uncertainties. This measurement is consistent with previous DMR and FIRAS results. {copyright} {ital 1996 The American Astronomical Society.}
- OSTI ID:
- 501307
- Journal Information:
- Astrophysical Journal, Vol. 470, Issue 1; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
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