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arXiv · 1010.0579

Contamination of the Central Sunyaev--Zel'dovich Decrements in AMiBA Galaxy Cluster Observations

Guo-Chin Liu·Mark Birkinshaw·Jiun-Huei Proty Wu·Paul T. P. Ho·Chih-Wei Locutus Huang·Yu-Wei Liao·Kai-Yang Lin·Sandor M. Molnar·Hiroaki Nishioka·Patrick M. Koch·Keiichi Umetsu·Fu-Cheng Wang·Pablo Altamirano·Chia-Hao Chang·Shu-Hao Chang·Su-Wei Chang·Ming-Tang Chen·Chih-Chiang Han·Yau-De Huang·Yuh-Jing Hwang·Homin Jiang·Michael Kesteven·Derek Kubo·Chao-Te Li·Pierre Martin-Cocher·Peter Oshiro·Philippe Raffin·Tashun Wei·Warwick Wilson
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Abstract

We investigate the contamination of the Sunyaev--Zel'dovich (SZ) effect for six galaxy clusters, A1689, A1995, A2142, A2163, A2261, and A2390, observed by the Y. T. Lee Array for Microwave Background Anisotropy during 2007. With the range of baselines used, we find that the largest effect (of order 13%-50% of the central SZ flux density) comes from primary anisotropies in the cosmic microwave background and exceeds the thermal noise in all six cases. Contamination from discrete radio sources is estimated to be at a level of (3%-60%) of the central SZ flux density. We use the statistics of these contaminating sources to estimate and correct the errors in the measured SZ effects of these clusters.

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Guo-Chin Liu, Mark Birkinshaw, Jiun-Huei Proty Wu, Paul T. P. Ho, Chih-Wei Locutus Huang, Yu-Wei Liao, Kai-Yang Lin, Sandor M. Molnar, Hiroaki Nishioka, Patrick M. Koch, Keiichi Umetsu, Fu-Cheng Wang, Pablo Altamirano, Chia-Hao Chang, Shu-Hao Chang, Su-Wei Chang, Ming-Tang Chen, Chih-Chiang Han, Yau-De Huang, Yuh-Jing Hwang, Homin Jiang, Michael Kesteven, Derek Kubo, Chao-Te Li, Pierre Martin-Cocher, Peter Oshiro, Philippe Raffin, Tashun Wei, Warwick Wilson. 2010-10-04. Contamination of the Central Sunyaev--Zel'dovich Decrements in AMiBA Galaxy Cluster Observations. https://doi.org/10.1088/0004-637x%2F720%2F1%2F608

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