Phillip Keegstra

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The Differential Microwave Radiometers (DMR) instrument aboard the Cosmic Background Explorer (COBE) has mapped the full microwave sky to mean sensitivity 26 μK per 7 field of view. The absolute calibration is determined to 0.7% with drifts smaller than 0.2% per year. We have analyzed both the raw differential data and the pixelized sky maps for evidence of(More)
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 four 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±0.04±0.16,(More)
We have analyzed the rst year of data from the Di erential Microwave Radiometers DMR on the Cosmic Background Explorer COBE The data show the dipole anisotropy Galactic emission and instrument noise and detect statistically signi cant structure that is well described as scale invariant uctuations with a Gaussian distribution The major portion of the(More)
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