Concepedia

Publication | Open Access

The Dipole Observed in the COBE DMR 4 Year Data

DOIFull Paper Access

202

Citations

0

References

1996

Year

Charles H. Lineweaver, Luis Tenorio, George F. Smoot, P. Keegstra, A. J. Banday, P. M. Lubin
The Astrophysical Journal

Abstract

The largest anisotropy in the cosmic microwave background (CMB) is the ~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 COBE Differential Microwave Radiometers (DMR), we obtain a best-fit dipole amplitude 3.358 +/- 0.001 +/- 0.023 mK in the direction (l, b) = (264.31^deg^ +/- 0.04^deg^ +/- 0.16^deg^, +48.05^deg^ +/- 0.02^deg^ +/- 0.09^deg^), 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.