Current and ongoing weak lensing surveys

Lensing map of 70 square degrees of sky from CFHTLenS The Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) was completed in 2013, and was the culmination of a decade-long survey and analysis programme by an international consortium of astronomers. The image on this page shows a map of the weak lensing signal that has been obtained for currently the largest contiguous area of sky. The full CFHTLenS survey covers 154 square degrees and has, to date, resulted in over 30 publications in refereed journals.

The analysis pipeline that was developed for CFHTLenS has also been used for the CS82 lensing survey and the RCSLenS surveys, also carried out with the CFHT.

The next generation of surveys is now underway, with Oxford being closely involved with the Kilo Degree Survey (KiDS), one of the main aims of which is to make a lensing and galaxy photometry survey over 1500 square degrees of sky.

Other upcoming ground-based surveys include the HyperSuprimeCam survey and the Dark Energy Survey, and in the more distant future we expect lensing survey results from LSST, SKA and also the Euclid space mission.