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2-Point Correlations in the COBE DMR 4-Year Anisotropy Maps

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arxiv astro-ph/9601061 v1 pith:BRFEPMOC submitted 1996-01-12 astro-ph

2-Point Correlations in the COBE DMR 4-Year Anisotropy Maps

classification astro-ph
keywords datapointanisotropynormalizationchannelcobeconsistentfrequency
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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 the angular power spectrum, and show that the data are statistically consistent from channel to channel and frequency to frequency. The most likely quadrupole normalization is computed for a scale-invariant power-law spectrum of CMB anisotropy, using a variety of data combinations. For a given data set, the normalization inferred from the 2-point data is consistent with that inferred by other methods. The smallest and largest normalization deduced from any data combination are 16.4 and 19.6 uK respectively, with a value ~18 uK generally preferred.

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