Open AccessHigh‐significance Sunyaev–Zel'dovich measurement: Abell 1914 seen with the Arcminute Microkelvin Imager ★
Author(s) -
Barker Robert,
Biddulph Phillip,
Bly Dennis,
Boysen Roger,
Brown Anthony,
Clementson Christopher,
Crofts Michael,
Culverhouse Thomas,
Czeres Jaroslaw,
Dace Roger,
D'Alessandro Robert,
Doherty Peter,
DuffettSmith Peter,
Duggan Kenneth,
Ely John,
Felvus Mike,
Flynn William,
Geisbüsch Jörn,
Grainge Keith,
Grainger William,
Hammet David,
Hills Richard,
Hobson Michael,
Holler Christian,
Jilley Roy,
Jones Michael E.,
Kaneko Takeshi,
Kneissl Rüdiger,
Lancaster Katy,
Lasenby Anthony,
Marshall Phil,
Newton Francis,
Norris Oliver,
Northrop Ian,
Pooley Guy,
Quy Vic,
Saunders Richard D. E.,
Scaife Anna,
Schofield Jack,
Scott Paul,
Shaw Clive,
Taylor Angela C.,
Titterington David,
Velić Marko,
Waldram Elizabeth,
West Simon,
Wood Brian,
Yassin Ghassan,
Zwart Jonathan
Publication year - 2006
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2006.00151.x
Subject(s) - physics , astrophysics , telescope , galaxy cluster , bolometer , flux (metallurgy) , sunyaev–zel'dovich effect , galaxy , cluster (spacecraft) , galaxy groups and clusters , intracluster medium , astronomy , optics , detector , metallurgy , materials science , computer science , programming language
We report the first detection of a Sunyaev–Zel'dovich (S–Z) decrement using the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster of galaxies A1914 and detected the S–Z effect with a significance of 17σ in a u v ‐tapered map at a mean frequency of 15.75 GHz. The integrated S–Z flux density of −8.6 ± 0.5 mJy is consistent with a simple X‐ray derived model for the intracluster gas. We find that the spectrum of the decrement, measured in the six channels between 13.5–18 GHz, fits well to that expected for the S–Z effect. The sensitivity of the telescope is consistent with the figures used in our simulations of cluster surveys with AMI.