Shapley Supercluster Survey: construction of the photometric catalogues and i-band data release
Date Issued
2015
Author(s)
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Limatola, L.
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Haines, C. P.
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Dopita, M.
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Capaccioli, M.
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Pimbblet, K. A.
Description
The authors thank the referee, R. Smith, for his constructive comments and suggestions. This work is based on data collected with the ESO-VLT Survey Telescope with OmegaCAM (ESO Programmes 088.A-4008, 089.A-0095, 090.A-0094, 091.A-0050) using Italian INAF Guaranteed Time Observations. The data base has made use of SVOCat, a VO publishing tool developed in the framework of the Spanish Virtual Observatory project supported by the Spanish MINECO through grant AYA 2011−14052 and the CoSADIE FP7 project (Call INFRA − 2012 − 3.3 Research Infrastructures, project 312559). SVOCat is maintained by the Data Archive Unit of the Centro de Astrobiologa (CSIC -INTA). The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-13) under grant agreement number 312430 (OPTICON; PI: P. Merluzzi) and PRIN-INAF 2011: Galaxy evolution with the VLT Surveys Telescope (VST) (PI A. Grado). CPH was funded by CONICYT Anillo project ACT-1122. PM thanks M. Petr-Gotzens for her support in the VST observations. AM and MB acknowledge financial support from PRIN-INAF 2014: Glittering Kaleidoscopes in the sky, the multifaceted nature and role of galaxy clusters (PI M. Nonino). PM and GB acknowledge financial support from PRIN-INAF 2014: Galaxy Evolution from Cluster Cores to Filaments (PI B.M. Poggianti).
Abstract
The Shapley Supercluster Survey is a multi-wavelength survey covering an area of ̃23 deg2 (̃260 Mpc2 at z = 0.048) around the supercluster core, including nine Abell and two poor clusters, having redshifts in the range 0.045-0.050. The survey aims to investigate the role of the cluster-scale mass assembly on the evolution of galaxies, mapping the effects of the environment from the cores of the clusters to their outskirts and along the filaments. The optical (ugri) imaging acquired with OmegaCAM on the VLT Survey Telescope is essential to achieve the project goals providing accurate multi-band photometry for the galaxy population down to m* + 6. We describe the methodology adopted to construct the optical catalogues and to separate extended and point-like sources. The catalogues reach average 5σ limiting magnitudes within a 3 arcsec diameter aperture of ugri = [24.4,24.6,24.1,23.3] and are 93 per cent complete down to ugri = [23.8,23.8,23.5,22.0] mag, corresponding to ̃m*r + 8.5. The data are highly uniform in terms of observing conditions and all acquired with seeing less than 1.1 arcsec full width at half-maximum. The median seeing in r band is 0.6 arcsec, corresponding to 0.56 kpc h^{-1}_{70} at z = 0.048. While the observations in the u, g and r bands are still ongoing, the i-band observations have been completed, and we present the i-band catalogue over the whole survey area. The latter is released and it will be regularly updated, through the use of the Virtual Observatory tools. This includes 734 319 sources down to i = 22.0 mag and it is the first optical homogeneous catalogue at such a depth, covering the central region of the Shapley supercluster.
Volume
453
Issue
4
Start page
3685
Issn Identifier
0035-8711
Ads BibCode
2015MNRAS.453.3685M
Rights
open.access
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