Preliminary Sunyaev-Zel'dovich observations of galaxy clusters with OCRA-p

2007/05/16 by K. Lancaster, Katy Lancaster, M. Birkinshaw +15
Physics and Astronomy · #Astronomy and Astrophysical Research #Brightest cluster galaxy #Data reduction #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy cluster #Galaxy groups and clusters #Radio Astronomy Observations and Technology #Radio galaxy #Sample (material) #astro-ph

paper · pdf · doi:10.1111/j.1365-2966.2007.11808.x

published as Mon.Not.Roy.Astron.Soc.378:673-680,2007 · 9 pages, 2 figures. Accepted by MNRAS, online early

openalex publication_date 2007/05/16 · arxiv created 2007/05/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

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 (Cl 0016+16, MS 0451.6–0305, MS 1054.4–0321 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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