2012CBET.3018....1D

A. J. Drake, S. G. Djorgovski, M. J. Graham, A. Mahabal, and R. Williams, California Institute of Technology; J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona; and E. Christensen, Gemini Observatory, report the discovery of an apparent supernova in unfiltered Catalina Sky Survey (CSS) images:

---------------------------------------------------------------------------— SN 2011 UT R.A. (2000.0) Decl. Mag. ---------------------------------------------------------------------------— 2011kd Dec. 29.55 12 14 55.42 - 4 25 07.6 19.7 ---------------------------------------------------------------------------—

Further CSS magnitudes for 2011kd: 2011 June 30.19 UT, [20.1; 2012 Jan. 21.47, 20.6; Feb. 2.48, [20.7. Spectroscopic confirmation was obtained with the Palomar 5-m reflector (+ DSBS) on Jan. 16 UT; a spectrogram (range 400-800 nm) was compared with a library of spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), showing that 2011kd best matches the type-Ia supernova 1994D at two weeks past maximum.