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4-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
C. L. Bennett, A. Banday, K. M. Gorski +7
The cosmic microwave background radiation provides unique constraints on cosmological models. In this Letter we present a summary of the spatial properties of the cosmic microwave…
Calibration and Systematic Error Analysis For the COBE-DMR Four-Year Sky Maps
A. Kogut, A. J. Banday, C. L. Bennett +8
The Differential Microwave Radiometers (DMR) instrument aboard the Cosmic Background Explorer (COBE) has mapped the full microwave sky to mean sensitivity 26 uK per 7 deg field of…
RMS Anisotropy in the COBE-DMR Four-Year Sky Maps
A. J. Banday, K. M. Gorski, C. L. Bennett +5
The sky-RMS is the simplest model-independent characterization of a cosmological anisotropy signal. The RMS temperature fluctuations determined from the -DMR four-year sky ma…
Non-cosmological Signal Contributions to the COBE-DMR Four-Year Sky Maps
A. J. Banday, K. M. Gorski, C. L. Bennett +3
We limit the possible contributions from non-cosmological sources to the COBE-DMR four-year sky maps. The DMR data are cross-correlated with maps of rich clusters, extragalactic IR…
Power Spectrum of Primordial Inhomogeneity Determined from the 4-Year COBE DMR Sky Maps
K. M. Gorski, A. J. Banday, C. L. Bennett +4
Fourier analysis and power spectrum estimation of the cosmic microwave background anisotropy on an incompletely sampled sky developed by Gorski (1994) has been applied to the high-…
Tests for Non-Gaussian Statistics in the DMR Four-Year Sky Maps
A. Kogut, A. J. Banday, C. L. Bennett +4
We search the high-latitude portion of the COBE Differential Microwave Radiometers (DMR) 4-year sky maps for evidence of a non-Gaussian temperature distribution in the cosmic micro…
2-Point Correlations in the COBE DMR 4-Year Anisotropy Maps
G. Hinshaw, A. J. Banday, C. L. Bennett +5
The 2-point temperature correlation function is evaluated from the 4-year COBE DMR microwave anisotropy maps. We examine the 2-point function, which is the Legendre transform of th…
Microwave Emission at High Galactic Latitudes
A. Kogut, G. Hinshaw, A. J. Banday +4
We use the COBE Differential Microwave Radiometers (DMR) 4-year sky maps to model Galactic microwave emission at high latitudes (|b| > 20 deg). Cross-correlation of the DMR maps wi…
Angular Power Spectrum of the Microwave Background Anisotropy seen by the COBE Differential Microwave Radiometer
E. L. Wright, C. L. Bennett, K. Gorski +2
The angular power spectrum estimator developed by Peebles (1973) and Hauser & Peebles (1973) has been modified and applied to the 4 year maps produced by the COBE DMR. The power sp…
Band Power Spectra in the COBE DMR 4-Year Anisotropy Maps
G. Hinshaw, A. J. Banday, C. L. Bennett +4
We employ a pixel-based likelihood technique to estimate the angular power spectrum of the COBE Differential Microwave Radiometer (DMR) 4-year sky maps. The spectrum is consistent…