CONTAMINATION OF THE CENTRAL SUNYAEV-ZEL'DOVICH DECREMENTS IN AMiBA GALAXY CLUSTER OBSERVATIONS
Journal
Astrophysical Journal
Journal Volume
720
Journal Issue
1
Pages
608-613
Date Issued
2010
Author(s)
Liu, Guo-Chin
Birkinshaw, Mark
Wu, Jiun-Huei Proty
Ho, Paul T. P.
Huang, Chih-Wei Locutus
Liao, Yu-Wei
Lin, Kai-Yang
Molnar, Sandor M.
Nishioka, Hiroaki
Koch, Patrick M.
Umetsu, Keiichi
Wang, Fu-Cheng
Altamirano, Pablo
Chang, Ciia-Hao
Chang, Shu-Hao
Chang, Su-Wei
Chen, Ming-Tang
Han, Chih-Chiang
Huang, Yau-De
Hwang, Yuh-Jing
Jiang, Homin
Kesteven, Michael
Kubo, Derek
Li, Chao-Te
Martin-Cocher, Pierre
Oshiro, Peter
Raffin, Philippe
Wei, Tashun
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 in 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. © 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
Type
journal article