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Pseudo-Dipole Signal Removal from WMAP Data | | Hao Liu
; Ti-Pei Li
; | | Date: |
13 May 2010 | | Abstract: | Different observational systematics, e.g., errors of antenna pointing
directions, asynchronous between the attitude and science data, can generate
pseudo-dipole signal in full-sky maps of the cosmic microwave background (CMB)
anisotropy released by The Wilkinson Microwave Anisotropy Probe (WMAP) team.
The antenna sidelobe response to the Doppler signal can produce similar effect
as well. In this work, independent to the sources we uniformly model the
pseudo-dipole signal and remove it from released CMB maps by model fitting. The
results demonstrate that the released WMAP CMB quadrupole is almost completely
artificial and the real quadrupole of the CMB anisotropy should be near zero. | | Source: | arXiv, 1005.2352 | | Services: | Forum | Review | PDF | Favorites | |
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