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Title:
Preliminary Sunyaev-Zel'dovich observations of galaxy clusters with OCRA-p
Authors:
Lancaster, Katy; Birkinshaw, Mark; Gawroński, Marcin P.; Browne, Ian; Feiler, Roman; Kus, Andrzej; Lowe, Stuart; Pazderski, Eugeniusz; Wilkinson, Peter
Affiliation:
AA(University of Bristol, Tyndall Avenue, Bristol BS6 5BX), AB(University of Bristol, Tyndall Avenue, Bristol BS6 5BX), AC(Torun Centre for Astronomy, Nicolas Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland), AD(Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL), AE(Torun Centre for Astronomy, Nicolas Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland), AF(Torun Centre for Astronomy, Nicolas Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland), AG(Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL), AH(Torun Centre for Astronomy, Nicolas Copernicus University, ul. Gagarina 11, 87-100 Torun, Poland), AI(Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire SK11 9DL)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 378, Issue 2, pp. 673-680. (MNRAS Homepage)
Publication Date:
06/2007
Origin:
MNRAS
MNRAS Keywords:
galaxies: clusters: individual: Cl0016+16, galaxies: clusters: individual: MS0451.6-0305, galaxies: clusters: individual: MS1054.4-0321, galaxies: clusters: individual: A2218, cosmic microwave background, cosmology: observations
DOI:
10.1111/j.1365-2966.2007.11808.x
Bibliographic Code:
2007MNRAS.378..673L

Abstract

We present 30-GHz Sunyaev-Zel'dovich (SZ) observations of a sample of four galaxy clusters with a prototype of the One Centimetre Receiver Array (OCRA-p) which is mounted on the Torun 32-m telescope. The clusters (Cl0016+16, MS0451.6-0305, MS1054.4-0321 and Abell 2218) are popular SZ targets and serve as commissioning observations. All four are detected with clear significance (4 -6σ) and values for the central temperature decrement are in good agreement with measurements reported in the literature. We believe that systematic effects are successfully suppressed by our observing strategy. The relatively short integration times required to obtain these results demonstrate the power of OCRA-p and its successors for future SZ studies.
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