2012CBET.3041....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 2012 UT R.A. (2000.0) Decl. Mag. Offset ---------------------------------------------------------------------------— 2012ar Mar. 1.49 16 20 36.02 -10 27 38.3 16.6 7".1 W, 27".8 N ---------------------------------------------------------------------------—

The variable was designated PSN J16203602-1027383 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2012ar based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2012ar (unfiltered unless noted otherwise): Jan. 25.56, [19.4 (CSS); Mar. 3.191, 16.9 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.38-m f/6.8 reflector; position end figures 36s.05, 38".1; reference stars from CMC-14 catalogue); 3.523, 16.9 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at the New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 36s.02, 38".1; image posted at URL http://www.flickr.com/photos/43846774@N02/6805881064/). The image from Luppi and Buzzi is posted at the following website URL: http://www.astrogeo.va.it/pub/TOCP/PSN_J16203602-1027383.jpg.