Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/6571
Title: Residual foreground contamination in the WMAP data
Authors: Pravabati, C
Park, C
Issue Date: 2014
Publisher: IOP Publishing
Citation: Journal of Physics: Conference Series, Vol. 484, 012028
Abstract: We have studied whether there is any residual foreground contamination in the foreground reduced WMAP-7 data for the differential assemblies (DAs) Q, V and W. We have calculated the correlation between the foreground map, from which long wavelength correlations have been subtracted, and the foreground reduced map for each DA. We have found positive correlations for all the channels. The statistical significance of the resulting values has been tested by comparing with correlations between the cleaned CMB maps and 1000 simulated Gaussian maps to which instrumental effects have been added. We have found high statistical significance of the observed correlations, implying the presence of residual contamination in the cleaned data, and found that, for Q and V channels, a large fraction of the contamination comes from pixels, where the foreground maps have positive values larger than three times its rms value, which shows the presence of unresolved point sources that contribute significantly to the contamination.
Description: Open Access Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
URI: http://hdl.handle.net/2248/6571
ISSN: 1742-6588
???metadata.dc.rights???: © IOP Publishing
???metadata.dc.relation.uri???: http://dx.doi.org/10.1088/1742-6596/484/1/012028
http://arxiv.org/abs/1210.2250
Appears in Collections:IIAP Publications

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