TY - JOUR
T1 - A maximum-likelihood approach to removing radio sources from observations of the Sunyaev-Zel'dovich effect, with application to Abell 611
AU - Grainger, William F.
AU - Das, Rhiju
AU - Grainge, Keith
AU - Jones, Michael E.
AU - Kneissl, Rüdiger
AU - Pooley, G. G.
AU - Saunders, Richard D E
PY - 2002/12/21
Y1 - 2002/12/21
N2 - 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 μJy beam-1 is found. This is combined with a ROSAT HRI image and a published ASCA temperature to give an H0 estimate of 52+24-16 km s-1 Mpc-1.
AB - 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 μJy beam-1 is found. This is combined with a ROSAT HRI image and a published ASCA temperature to give an H0 estimate of 52+24-16 km s-1 Mpc-1.
KW - Cosmic microwave background
KW - Cosmology: observations
KW - Distance scale
KW - Galaxies: clusters: individual: Abell 611
KW - Methods: data analysis
KW - X-rays: galaxies: clusters
U2 - 10.1046/j.1365-8711.2002.05815.x
DO - 10.1046/j.1365-8711.2002.05815.x
M3 - Article
SN - 1365-2966
VL - 337
SP - 1207
EP - 1214
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -