ESTIMATING MICROWAVE POWER SPECTRA

preprint1995arXivOpen access

Abstract

A new method for estimating the power spectrum ClC_l from cosmic microwave background (CMB) maps was recently presented by the author and applied to the 2 year COBE data. It was found that the spectral resolution ΔlΔl for COBE could be more than doubled at l=15l=15, thereby revealing previously unresolved features in the power spectrum. Whereas that paper was rather technical, the present paper shows that all qualitative features of this method can be understood from a simple analogy with quantum mechanics.

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