J/A+A/462/875       Garching-Bonn Deep Survey (GaBoDS) IX    (Schirmer+, 2007)
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Beginning of ReadMe : J/A+A/462/875 Garching-Bonn Deep Survey (GaBoDS) IX (Schirmer+, 2007) ================================================================================ GaBoDS: the Garching-Bonn Deep Survey. IX. A sample of 158 shear-selected mass concentration candidates. Schirmer M., Erben T., Hetterscheidt M., Schneider P. <Astron. Astrophys., 462, 875-887 (2007)> =2007A&A...462..875S ================================================================================ ADC_Keywords: Clusters, galaxy ; Redshifts Keywords: cosmology: dark matter - galaxies: clusters: general - gravitational lensing Abstract: The aim of the present work is the construction of a mass-selected galaxy cluster sample based on weak gravitational lensing methods. This sample will be subject to spectroscopic follow-up observations. We apply the mass aperture statistics (S-statistics) and a new derivative of it (the P-statistics) to 19 square degrees of high quality, single colour wide field imaging data obtained with the WFI@MPG/ESO 2.2m telescope. For the statistics a family of filter functions is used that approximates the expected tangential radial shear profile and thus allows for the efficient detection of mass concentrations. The exact performance of the P-statistics still needs to be evaluated by means of simulations. Description: The GaBoDS was conducted with the wide field imager (hereafter WFI@2.2) of the 2.2m MPG/ESO telescope in the R-band. It is to about 80% a virtual survey, which means most of the data was not taken by us but collected from the ESO archive.