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RCSLenS: The Red Cluster Sequence Lensing Survey

Hildebrandt, H, Choi, A, Heymans, C, Blake, C, Erben, T, Miller, L, Nakajima, R, van Waerbeke, L, Viola, M, Buddendiek, A, Harnois-Déraps, J, Hojjati, A, Joachimi, B, Joudaki, S, Kitching, TD, Wolf, C, Gwyn, S, Johnson, N, Kuijken, K, Sheikhbahaee, Z , Tudorica, A and Yee, HKC (2016) RCSLenS: The Red Cluster Sequence Lensing Survey. Monthly Notices of the Royal Astronomical Society, 463 (1). pp. 635-654. ISSN 0035-8711

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We present the Red Cluster Sequence Lensing Survey (RCSLenS), an application of the methods developed for the Canada–France–Hawaii Telescope Lensing Survey (CFHTLenS) to the ∼785 deg2, multi-band imaging data of the Red-sequence Cluster Survey 2. This project represents the largest public, sub-arcsecond seeing, multi-band survey to date that is suited for weak gravitational lensing measurements. With a careful assessment of systematic errors in shape measurements and photometric redshifts, we extend the use of this data set to allow cross-correlation analyses between weak lensing observables and other data sets. We describe the imaging data, the data reduction, masking, multi-colour photometry, photometric redshifts, shape measurements, tests for systematic errors, and a blinding scheme to allow for more objective measurements. In total, we analyse 761 pointings with r-band coverage, which constitutes our lensing sample. Residual large-scale B-mode systematics prevent the use of this shear catalogue for cosmic shear science. The effective number density of lensing sources over an unmasked area of 571.7 deg2 and down to a magnitude limit of r ∼ 24.5 is 8.1 galaxies per arcmin2 (weighted: 5.5 arcmin−2) distributed over 14 patches on the sky. Photometric redshifts based on four-band griz data are available for 513 pointings covering an unmasked area of 383.5 deg2. We present weak lensing mass reconstructions of some example clusters as well as the full survey representing the largest areas that have been mapped in this way. All our data products are publicly available through Canadian Astronomy Data Centre at http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/en/community/rcslens/query.html in a format very similar to the CFHTLenS data release.

Item Type: Article
Additional Information: This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 0201 Astronomical and Space Sciences
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Oxford University Press (OUP)
Date Deposited: 24 Jul 2020 09:40
Last Modified: 04 Sep 2021 06:56
DOI or ID number: 10.1093/mnras/stw2013
URI: https://researchonline.ljmu.ac.uk/id/eprint/13359
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