VizieR Online Data Catalog: 44 SZ-selected galaxy clusters ACT observations (Sifon+, 2016)

ACT is a 6-metre off-axis Gregorian telescope located at an altitude of 5200um in the Atacama desert in Chile, designed to observe the CMB at arcminute resolution. Galaxy clusters were detected in the 148GHz band by matched-filtering the maps with the pressure profile suggested by Arnaud et al. (2010A&A...517A..92A), fit to X-ray selected local (z<0.2) clusters, with varying cluster sizes,θ₅₀₀, from 1.18 to 27-arcmin.

Because of the complete overlap of ACT equatorial observations with Sloan Digital Sky Survey Data Release 8 (SDSS DR8; Aihara et al., 2011ApJS..193...29A) imaging, all cluster candidates were assessed with optical data (Menanteau et al., 2013ApJ...765...67M).

We observed 20 clusters from the equatorial sample with the Gemini Multi-Object Spectrograph (GMOS) on the Gemini-South telescope, split in semesters 2011B (ObsID:GS-2011B-C-1, PI:Barrientos/Menanteau) and 2012A (ObsID:GS-2012A-C-1, PI:Menanteau), prioritizing clusters in the cosmological sample at 0.3<z<1.0. All observations followed our setup for the southern sample (Sifon et al. 2013, Cat. J/ApJ/772/25).

We also observed seven clusters in S82 with the Robert Stobie Spectrograph (RSS) on the Southern African Large Telescope (SALT), using MOS. Details of these observations are given in Kirk et al. (2015, Cat. J/MNRAS/449/4010).

In order to enlarge the sample of studied clusters and member galaxies, we also compiled archival data for the equatorial sample.

(1 data file).