Supernova 2011gp in UGC 3119 = Psn J04390804+1131516
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Date
2011
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Abstract
Report the discovery of an apparent supernova in public images from the Mount Lemmon Survey: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011gp Sep. 30.45 4 39 08.04 +11 31 51.6 18.4 5".1 E, 1".7 N This variable was designated PSN J04390804+1131516 when it was posted on the Central Bureau's TOCP webpage and is here designated SN 2011?? based on the spectroscopic report below. S. Valenti, E. Cappellaro, S. Benetti, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica (INAF); M. Turatto, Osservatorio Astronomico di Trieste, INAF; and A. Pastorello, Dipartimento di Astronomia, Universita di Padova, on behalf of a larger collaboration, report that a spectrogram (range 360-810 nm; resolution 2.2 nm) of PSN J04390804+1131516 = SN 2011gp, obtained on Sept. 30.95 UT with the Ekar-Copernico 1.82-m telescope (+ AFOSC), shows a red continuum, strong H_alpha emission, Na I D, and other lines typical of type-II supernovae. Cross-correlation with a library of supernova spectra via the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024), suggests that 2011gp is a couple of months after maximum light....