CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey - Imaging Data and Catalogue Products

Abstract

We present data products from the Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS). CFHTLenS is based on the Wide component of the Canada-France-Hawaii Telescope Legacy Survey (CFHTLS). It encompasses 154 deg^2 of deep, optical, high-quality, sub-arcsecond imaging data in the five optical filters u^*g'r'i'z'. The article presents our data processing of the complete CFHTLenS data set. We were able to obtain a data set with very good image quality and high-quality astrometric and photometric calibration. Our external astrometric accuracy is between 60-70 mas with respect to SDSS data and the internal alignment in all filters is around 30 mas. Our average photometric calibration shows a dispersion on the order of 0.01 to 0.03 mag for g'r'i'z' and about 0.04 mag for u^* with respect to SDSS sources down to i <= 21. In the spirit of the CFHTLS all our data products are released to the astronomical community via the Canadian Astronomy Data Centre. We give a description and how-to manuals of the public products which include image pixel data, source catalogues with photometric redshift estimates and all relevant quantities to perform weak lensing studies.

arXiv comment34 pages, 15 figures, 7 tables, submitted to MNRAS All CFHTLenS data products (image pixel data and lensing/photo-z catalogues) are publicly released to the community via CADC on the 1st of November 2012. Please vistit http://www.cfhtlens.org/ and http://www.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/community/CFHTLens/query.html

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• Deep CFHT Y-band imaging of VVDS-F22 field: I. data products and photometric redshifts
• Dark Energy Survey Year 3 results: Galaxy-halo connection from galaxy-galaxy lensing
• Dramatic X-ray spectral variability of a Compton-thick type-1 QSO at $z\sim 1$
• Dark Energy Survey Year 1 Results: Photometric Data Set for Cosmology
• Implications for the missing low-mass galaxies (satellites) problem from cosmic shear
• Removing the Impact of Correlated PSF Uncertainties in Weak Lensing
• Lensing Without Borders. I. A Blind Comparison of the Amplitude of Galaxy-Galaxy Lensing Between Independent Imaging Surveys
• Chasing the peak: optimal statistics for weak shear analyses
• A New Wavelet Scattering Transform-Based Statistic for Cosmological Analysis of Large-Scale Structure
• HSC-XXL : Baryon budget of the 136 XXL Groups and Clusters
• Biased Moments of Undersampled Sources
• AMICO galaxy clusters in KiDS-DR3: the impact of estimator statistics on the luminosity-mass scaling relation
• Cosmological implications of the full shape of anisotropic clustering measurements in BOSS and eBOSS
• Photometric redshifts for quasars from WISE-PS1-STRM
• Dark Energy Survey Year 3 Results: Three-Point Shear Correlations and Mass Aperture Moments
• Origin & evolution of the Universe