Supernova 2011jk in UGC 3843 = Psn J07274305+2006217

Report the discovery of an apparent supernova in public images from the Mount Lemmon Survey (MLS): SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011jk Nov. 27.39 7 25 43.05 +20 06 21.7 19.2 10".5 W, 13".7 N The variable was designated PSN J07274305+2006217 when it was posted at the Central Bureau's TOCP webpage because the right ascension was originally posted erroneously as 27' instead of the proper 25'; the variable is here designated SN 2011jk based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2011jk (unfiltered unless noted otherwise): Mar. 5.20 UT, [20.6 (MLS); Nov. 28.319, 18.6 (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 43s.13, 22".0); Dec. 24.42, 19.0 (MLS). Brimacombe's image is posted at website URL http://www.flickr.com/photos/43846774@N02/6421768255/. L. Tomasella, S. Valenti, S. Benetti, F. Bufano, M. Fiaschi, A. Pastorello, and P. Ochner, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, on behalf of a larger collaboration, report that a low-signal-to-noise spectrogram of PSN J07274305+2006217 = SN 2011jk, obtained on Dec. 23.97 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC; range 350-820 nm; resolution 2.4 nm), suggests that it is a type-IIP supernova, similar to SN 2005cs (Pastorello et al. 2009, MNRAS 394, 2266) at a couple of months after the explosion....