A maximum-likelihood approach to removing radio sources from SZ observations, with application to Abell 611

Details A maximum-likelihood approach to removing radio sources from SZ observations, with application to Abell 611 A maximum-likelihood approach to removing radio sources from SZ observations, with application to Abell 611

2001-02-28

arxiv.org/abs/astro-ph/0102489v1

Mon.Not.Roy.Astron.Soc. 337 (2002) 1207

Astronomy and Astrophysics

Astrophysics

8 pages, 9 figures. Submitted to MNRAS

Scientific paper

10.1046/j.1365-8711.2002.05815.x

We describe a maximum-likelihood technique for the removal of contaminating radio sources from interferometric observations of the Sunyaev-Zel'dovich (SZ) effect. This technique, based on a simultaneous fit for the radio sources and extended SZ emission, is also compared to techniques previously applied to Ryle Telescope observations and is found to be robust. The technique is then applied to new observations of the cluster Abell 611, and a decrement of -540 +/- 125 microJy/beam is found. This is combined with a ROSAT HRI image and a published ASCA temperature to give an Hubble constant estimate of 52+24-16 km/s/Mpc.

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