Journal article
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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Authors
Bibliographic Details
- Journal:
- Astrophys. J.
- Volume:
- 563
- Pages:
- L99
- Publication date:
- 2001-11-13
- DOI:
- Source identifiers:
-
208091
Item Description
- Keywords:
- Pubs id:
-
pubs:208091
- UUID:
-
uuid:d0b93746-0834-478f-91c5-860048f294a7
- Local pid:
- pubs:208091
- Deposit date:
- 2012-12-19
Terms of use
- Copyright date:
- 2001
- Notes:
-
4 pages, 2 figures, emulateapj style. Updated to match published
version
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