Canadians become members of the Euclid Consortium

By/par Ray Carlberg
(Cassiopeia – Autumn/l’automne 2016)

Recently CFHT approved the Canada-France Imaging Survey as a Large Program for 271 nights. The Canadian PI is Alan McConnachie, and Rodrigo Ibata for France. The survey will give slightly deeper than u~24 and r~24 imaging over a (highly approximate) 10,000 and 5,000 square degrees, respectively. CFIS has a range of standalone science goals. As announced in a CASCA email in July, the Euclid Consortium offered a number of memberships in return for access to the data. Euclid is a ESA mission to measure the geometry of the universe and test gravitation theory on large scales using a combination of photometric measurements of clustering, infall velocities from low resolution spectra, and weak gravitational lensing measurements. The satellite will provide a large legacy dataset in the YJH bands, at roughly 0.3” resolution, and a wide visible (riz) band, at 0.1” resolution. The Euclid survey area is approximately 15,000 square degrees of high galactic latitude sky. The mission is described at

Euclid is of interest from other telescopes. On the ground a Spanish telescope will cover the northern (CFIS) area in the g band and there is interest from Subaru in doing some redder bands. Spitzer recently approved 5286 hours for the Euclid/WFIRST Spitzer Legacy Survey (PI: Peter Capak, a Canadian).

Euclid has approved membership for the following people: Michael Balogh, Dick Bond, Jo Bovy, Raymond Carlberg, Scott Chapman, Patrick Cote, Nicolas Cowan, Sebastien Fabbro, Laura Ferrarese, Renee Hlozek, Mike Hudson, JJ Kavelaars, Dustin Lang, Alan McConnachie, Adam Muzzin, Laura Parker, Chris Pritchet, Marcin Sawicki, David Schade, Douglas Scott, Kendrick Smith, Kristine Spekkens, James Taylor, Chris Willott. John Hutchings and Denis Laurin are ex officio members for CSA. Carlberg will be the initial ECB member for Canada and is the contact point in Canada for Euclid matters. It has been a somewhat winding road to participation in this important mission. Although CSA helped start the process it needed to step away a few years ago. No direct funding is attached to our participation, although the obligation to provide the data is of interest to CADC/CANFAR. As resignations occur new memberships may become available in the future.

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