2012CBET.3151....1H

S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad Catolica de Chile; R. H. McNaught, Australian National University; 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 public images from the Catalina Sky Survey (CSS).

---------------------------------------------------------------------------— SN 2012 UT R.A. (2000.0) Decl. Mag. Offset ---------------------------------------------------------------------------— 2012cz May 25.28 15 57 46.36 +16 22 27.4 18.9 2" W, 3" N ---------------------------------------------------------------------------—

The variable was designated PSN J15574636+1622274 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012cz based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012cz: Mar. 17.40 UT, 18.1 (CSS); Apr. 18.39, 18.4 (CSS); Apr. 29.30, 18.6 (CSS); May 15.44, 18.9 (CSS); 27.258, 17.6 (J. Brimacombe, Cairns, Australia; luminance filter assumed; position end figures 46s.36, 28".1; image posted at website URL http://www.flickr.com/photos/43846774@N02/7286069916/); June 10.29, 18.9 (CSS); June 16.37, 19.1 (CSS). Federica Luppi and Luca Buzzi (Varese, Italy) obtained unfiltered images with a 0.38-m f/6.8 reflector on May 29.998 that yield position end figures 46s.44, 28".7 for 2012cz (reference stars from the CMC-14 catalogue); they have posted their image at the following website URL: http://www.astrogeo.va.it/pub/TOCP/PSN_J15574636+1622274.jpg.