2011CBET.2963....1M

R. H. McNaught and G. Garradd, Australian National University; A. J. Drake, M. J. Graham, A Mahabal, S. G. Djorgovski, 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 Siding Spring Survey (SSS) images:

---------------------------------------------------------------------------— SN 2011 UT R.A. (2000.0) Decl. Mag. Offset ---------------------------------------------------------------------------— 2011jn Dec. 26.72 12 57 14.79 -17 24 00.5 17.0 45".8 E, 33".7 N ---------------------------------------------------------------------------—

The variable was designated PSN J12571479-1724005 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2011jn based on the spectroscopic confirmation reported below. Further CCD magnitudes for 2011jn (unfiltered unless noted otherwise): Aug. 3.40, [18.8 (SSS); Dec. 27.511, 18.6 (L. Elenin, Lyubertsy, Russia; remotely taken at ISON-NM Observatory near Mayhill, NM, USA with 0.45-m f/2.8 telescope + KAF09000 CCD; limiting mag about 20.5; position end figures 14s.81, 00".3, uncertainty ± 0".1; UCAC3 reference stars; nothing visible at this position on Palomar Sky Survey images taken in eight different epochs; image posted at the following website URL: http://spaceobs.org/images/TOCP/PSNJ12571479-1724005-20111227.png); 28.201, 18.0 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.38-m f/6.8 reflector; position end figures 14s.81, 00".1; reference stars from CMC-14 catalogue; image posted at http://www.astrogeo.va.it/pub/TOCP/PSN_P44257.jpg); 28.521, 17.6 (Joseph Brimacombe, Cairns, Australia; remotely using a 51-cm RCOS telescope + STL11K camera + luminance filter at New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 14s.85, 00".4; image posted at URL http://www.flickr.com/photos/43846774@N02/6590345943/).