Monthly Notices of the Royal Astronomical Society· 2013Q1
CFHTLenS: the Canada–France–Hawaii Telescope Lensing Survey – imaging data and catalogue products
- 420citations
- Q1SCImago
- 2013year
Short summary
The CFHTLenS survey releases 154 deg² of deep, sub-arcsecond optical imaging data across five filters, achieving external astrometric accuracy of 60-70 mas and photometric calibration of 0.01-0.03 mag, enabling weak gravitational lensing analyses.
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Key points
- CFHTLenS provides 154 deg² of deep optical imaging data in five filters (u*griz).
- Achieved external astrometric accuracy of 60-70 mas relative to SDSS.
- Photometric calibration shows a dispersion of 0.01-0.03 mag for griz and ~0.04 mag for u* relative to SDSS.
- Data quality is suitable for weak gravitational lensing analyses.
AI-generated from the title and abstract; the full text is not read.
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 scientific aims of the CFHTLenS team are weak gravitational lensing studies supported by photometric redshift estimates for the galaxies. This paper 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 and 70 mas with respect to Sloan Digital Sky Survey (SDSS) data, and the internal alignment in all filters is around 30 mas. Our average photometric calibration shows a dispersion of the order of 0.01-0.03 mag for g r i z and about 0.04 mag for u * with respect to SDSS sources down to i SDSS 21. We demonstrate in accompanying papers that our data meet necessary requirements to fully exploit the survey for weak gravitational lensing analyses in
The authors' abstract, as published at the source. Monthly Notices of the Royal Astronomical Society, 2013 · DOI ↗
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Field: Instrumentation
InstrumentationPhysics and Astronomy