SNLS-2
C. Pritchet + SNLS Team

Abstract: Building on our experience and success with the CFHT Supernova Legacy, Survey (SNLS), we are in the initial stages of studying a, next-generation supernova survey, SNLS-2. Conceptually this survey, would trade exposure time and redshift depth for solid angle coverage, and supernova numbers. While many details need to be worked out, one, straw man concept that we are considering is: (1) observations in, g'r'i' only; (2) total observing time TBD, depending on overlap of, data with other large programs, but at least that of SNLS (~22 hr per, queue run); (3) exposure times 10 times shorter than for SNLS; (4), photometric typing of SNe, with redshifts from multislit spectroscopy, of hosts; (5) observations over 3 years (2009-2011). Such a survey, reaches redshift about 0.7, covers ~55 deg^2, and results in the, detection of more than 2000 Type Ia supernovae (and comparable numbers, of core collapse supernovae). Some of the scientific goals of such a, survey would include improved cosmological constraints, filling in the, SNIa "desert" at z=0.2-0.4, studies of supernova systematics from, well-populated subsamples, and detailed studies of rare but very, interesting subclasses of supernovae. CFHT is in a unique position for, such a survey because MegaCam is a proven, stable, and well-calibrated, instrument; SNLS-2 could be a world leader for some years to come.