The dipole observed in the {ital COBE} DMR 4 year data

Journal Article · Tue Oct 01 00:00:00 EDT 1996 · Astrophysical Journal

DOI:https://doi.org/10.1086/177846· OSTI ID:501307

Lineweaver, C H ^[1]; Tenorio, L ^[2]; Smoot, G F ^[3]; Keegstra, P ^[4]; Banday, A J ^[4]; Lubin, P ^[5]

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1. Observatoire de Strasbourg, 67000 Strasbourg (France)
2. Universidad Carlos III, Madrid (Spain)
3. Lawrence Berkeley Laboratory, Space Sciences Laboratory, and Center for Particle Astrophysics, Building 50-205, University of California, Berkeley, California 94720 (United States)
4. Hughes STX Corporation, Laboratory for Astronomy and Solar Physics, Code 685, NASA/Goddard Space Flight Center, Greenbelt, Maryland 20771 (United States)
5. 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, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 470; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ANISOTROPY
BACKGROUND RADIATION
CALIBRATION
COSMIC RADIATION
COSMOLOGICAL MODELS
DIPOLES
MICROWAVE RADIATION
RADIOMETERS
STATISTICS