Further Sunyaev-Zel'dovich observations of two Planck ERCSC clusters with the Arcminute Microkelvin Imager
AMI Consortium; Olamaie, Malak; Davies, Matthew L.; Feroz, Farhan; Franzen, Thomas M. O.; Hobson, Michael P.; Hurley-Walker, Natasha; Saunders, Richard D. E.; Scaife, Anna M. M.; Scott, Paul F.; Shimwell, Timothy; Grainge, Keith; Brown, Michael L.; Lasenby, Anthony; Pooley, Guy; Schammel, Michel P.; Rodríguez-González, Carmen; Titterington, David; Waldram, Elizabeth
United Kingdom, Australia, Ireland
Abstract
We present follow-up observations of two galaxy clusters detected blindly via the Sunyaev-Zel'dovich (SZ) effect and released in the Planck Early Release Compact Source Catalogue. We use the Arcminute Microkelvin Imager, a dual-array 14-18 GHz radio interferometer. After radio source subtraction, we find a SZ decrement of integrated flux density -1.08 ± 0.10 mJy towards PLCKESZ G121.11+57.01, and improve the position measurement of the cluster, finding the centre to be RA ?, to an accuracy of 20 arcsec. The region of PLCKESZ G115.71+17.52 contains strong extended emission, so we are unable to confirm the presence of this cluster via the SZ effect. We request that any reference to this Letter cites 'AMI Consortium: Hurley-Walker et al. 2011'.