Electronic Telegram No. 2634 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 2011H NEAR UGC 1837 Further to CBET 2630, A. Narla, S. B. Cenko, W. Li, A. A. Miller, and A. V. Filippenko report the LOSS discovery of an apparent supernova on unfiltered KAIT images: SN 2011 UT R.A. (2000.0) Decl. Mag. Offset 2011H Jan. 4.26 2 23 06.02 +43 02 32.4 15.6 83".1 E, 109".6 N Additional KAIT magnitudes for 2011H: 2010 Dec. 2.24 UT, [19.1; 2011 Jan. 6.26, 15.9. L. Lopez, D. Kirkman, and D. Tytler, University of California, San Diego, obtained a spectrum (range 310-810 nm) of 2011H with the 3-m Shane reflector (+ Kast) at Lick Observatory on Jan. 9 UT. Cross-correlation with a library of supernova spectra using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2011H is a normal type-Ia supernova somewhat past maximum light. A redshift of z = 0.020 +/- 0.003 is derived, based on the broad supernova features, consistent with the reported redshift for UGC 1837 (z = 0.021955 from NED). However, due to the large spatial offset, the supernova's host-galaxy identification is quite ambiguous. Given that UGC 1837 resides in a galaxy group, 2011H could be an intracluster supernova, or the progenitor system may have originated in a more nearby, faint, and uncatalogued group member. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 January 13 (CBET 2634) Daniel W. E. Green