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The Trispectrum of the 4 Year COBE-DMR data

Abstract:

We propose an estimator for the trispectrum of a scalar random field on a sphere, discuss its geometrical and statistical properties, and outline its implementation. By estimating the trispectrum of the 4 year COBE-DMR data (in HEALPix pixelization) we find new evidence of a non-Gaussian signal associated with a known systematic effect. We find that by removing data from the sky maps for those periods of time perturbed by this effect, the amplitudes of the trispectrum coefficients become comp...

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Publisher copy:
10.1086/338602

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Journal:
Astrophys. J.
Volume:
563
Pages:
L99
Publication date:
2001-11-13
DOI:
URN:
uuid:d0b93746-0834-478f-91c5-860048f294a7
Source identifiers:
208091
Local pid:
pubs:208091
Keywords:

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