Electronic Telegram No. 2725 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network SUPERNOVA 2011db NEAR PGC 49027 = PSN 13490590+1714005 A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Carnegie Observatories; 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 Catalina Real-time Transient Survey's discovery of an apparent supernova in unfiltered survey images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011db May 12.30 13 49 05.90 +17 14 00.5 17.4 6".4 E, 17".1 S This variable was designated PSN J13490590+1714005 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011db based on the spectroscopic report below. Further magnitudes for 2011db: Apr. 25.22 UT, [20.0 (Catalina Sky Survey); May 13.357, 17.2 (Joseph Brimacombe, Cairns, Australia; from six stacked 1200-s images taken remotely using a 51-cm RCOS telescope + red filter + STL11K camera at New Mexico Skies Observatory near Mayhill, NM, U.S.A.; position end figures 05s.95, 13'59".6, which is near PGC 49027; his image is posted at the following website URL: http://www.flickr.com/photos/43846774@N02/5725585922/). L. Tomasella, P. Ochner, S. Valenti, and S. Benetti, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova; and A. Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a larger collaboration, report that a spectrogram (range 390-810 nm; resolution 2.2 nm) of PSN 13490590+1714005 = SN 2011db, obtained on May 25.89 UT by the Service Telescope Operator Team with the Ekar-Copernicus 1.82-m telescope (+ AFOSC), is a type-II supernova, similar to SN 2007od (Inserra et al. 2011, posted at website URL http://lanl.arxiv.org/abs/1102.5468) at a couple of weeks after explosion. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 May 28 (CBET 2725) Daniel W. E. Green