Array for microwave background anisotropy: Observations, data analysis, and results for sunyaev-zel'dovich effects

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

Research output: Contribution to journalArticle (Academic Journal)peer-review

22 Citations (Scopus)

Abstract

We present observations, analysis, and results for the first-year operation of Array for Microwave Background Anisotropy (AMiBA), an interferometric experiment designed to study cosmology via the measurement of cosmic microwave background (CMB). AMiBA is the first CMB interferometer operating at 3 mm to have reported successful results, currently with seven close-packed antennas of 60 cm diameter giving a synthesized resolution of around 6′. During 2007, AMiBA detected the Sunyaev-Zel'dovich effects (SZEs) of six galaxy clusters at redshift 0.091 ≤ z ≤ 0.322. An observing strategy with on-off-source switching is used to minimize the effects from electronic offset and ground pickup. Planets were used to test the observational capability of AMiBA and to calibrate the conversion from correlator time-lag data to visibilities. The detailed formalism for data analysis is given. We summarize our early tests including observations of planets and quasars, and present images, visibility profiles, the estimated central coordinates, sizes, and SZE amplitudes of the galaxy clusters. Scientific implications are summarized. We also discuss possible systematic effects in the results.

Original languageEnglish
Pages (from-to)1619-1628
Number of pages10
JournalAstrophysical Journal
Volume694
Issue number2
DOIs
Publication statusPublished - 1 Jan 2009

Keywords

  • Cosmic microwave background
  • Cosmology: observations
  • Galaxies: clusters: general
  • Methods: data analysis

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