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La Silla-QUEST Detection and GMOS Spectroscopy of Type Ia SN-LSQ12ca

ATel #3908; E. Hadjiyska (Yale), D. Rabinowitz (Yale), C. Baltay (Yale), N. Ellman (Yale), R. McKinnon (Yale), P. Nugent (LBNL), J. Parrent (LCOGT/Dartmouth), D. A. Howell (LCOGT/UCSB)
on 2 Feb 2012; 15:36 UT
Credential Certification: Ellie Hadjiyska (ellie.hadjiyska@yale.edu)

Subjects: Optical, Supernovae, Transient

We report the discovery of a Type Ia SN on January 15.104 (when the variable was at magnitude R = 19.5), as part of the La Silla-QUEST (LSQ) transient survey. Photometry is calibrated to the USNO-B1.0 catalog. The source's position is RA = 05:31:3.62, Dec = -19:47:59.1 (J2000). Follow up LSQ observations taken during January 16-30 UT reveal a gradual brightness increase by > 1 mag. Spectrum was taken with Gemini South GMOS (range 350-965 nm), obtained on January 28 UT showing that LSQ11ca is a young type Ia supernova approximately 7 days before peak brightness at a redshift of z=0.105.