CFIS

The Canada-France Imaging Survey (CFIS, to be read Sea-Fizz) is an ongoing legacy survey. Observations have started in early February 2017 at the Canada-France-Hawaii Telescope (CFHT) in Mauna Kea, Hawaii, and will continue through to the end of January 2020. CFIS observes in both the r and u bands, and will eventually cover about 5000 and 10000 square degrees of the northern hemisphere sky, respectively. The data provided by CFIS will be critical for the estimation of photometric redshifts, a requirement of paramount importance for the success of the Euclid mission. 

It also allows for several science goals in various subfields of astrophysics to be reached directly. In particular, Weak Lensing studies can be performed based on CFIS images, a project in which several members of the CosmoStat team are heavily involved. Some of the main work the CosmoStat team is performing, or plans to perform, with CFIS data, is:

• Development of a shear measurement pipeline (Florent Sureau, Samuel Farrens, Martin Kilbinger, Axel Guinot et al.)

• Comparison of different tracers of Dark Matter, including mass mapping and peak counts (Sandrine Pires, Austin Peel, Martin Kilbinger, Jean-Luc Starck et al.)

• Exploration of modified gravity models (Valeria Pettorino)

• Estimation of galaxy bias (Arnau Pujol, Jérôme Bobin, Martin Kilbinger)

• Cross-correlation with SDSS and test of General Relativity (Axel Guinot, Martin Kilbinger)

• Application of novel methods of PSF estimation developed in house (Samuel Farrens, Morgan Schmitz, Jean-Luc Starck et al.)