Electronic Telegram No. 2826 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 2011ft NEAR UGC 11021 = PSN J17524298+2904106 Pavel Balanutsa and Vladimir Lipunov report that the MASTER-Net auto- detection system at Tunka (http://observ.pereplet.ru) detected an apparent supernova (mag 17.1) on a 180-s unfiltered CCD exposure (limiting mag 19.4) taken on Aug. 30.70 UT. The new object is located at R.A. = 17h52m42s.98, Decl. = +29d04'10".6, (equinox 2000.0; uncertainty 0".2), which is 46" east and 38" north of the galaxy UGC 11021. Nothing is visible at this position on a MASTER/Tunka reference image from June 22.75 (limiting mag 19.0). The variable was designated PSN J17524298+2904106 when posted at the Central Bureau's TOCP webpage and is here designated SN 2011ft based on the spectroscopic report below. The discovery image is available at website URL http://observ.pereplet.ru/images/SN110830/MASTER110830.png. J. L. Prieto, Princeton University, reports that a low-resolution optical spectrogram (range 370-920 nm; resolution 0.7 nm) of PSN J17524298+2904106 = SN 2011ft was obtained on Aug. 30.98 UT with the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory in Chile. The spectrum shows broad He I absorption features consistent with a type-Ib supernova. Cross-correlation with a library of supernova spectra using SNID (Blondin and Tonry 2007, Ap.J. 666, 1024) shows that the spectrum is most similar to that of normal type-Ib supernovae at approximately 2-3 weeks after maximum light. The redshift derived from the supernova features is consistent within the uncertainties with the redshift of UGC 11021 (z = 0.0173; Springob et al. 2005, Ap.J. Suppl. 160, 149). It is interesting to note that the supernova is 60" from the center of its host galaxy, which implies a projected separation of about 22 kpc, assuming a distance of 75 Mpc to UGC 11021 (via NED, from the Virgo-infall recession velocity and h = 0.73). Furthermore, the spiral host galaxy (class type Sb in the RC3 catalogue) is seen almost edge-on, and the supernova lies well outside a linear extrapolation of the optical disk, at a projected distance from the disk of about 7 kpc. This location implies that the supernova either exploded in the halo of UGC11021 or in a low-luminosity dwarf-galaxy companion. All these properties resemble the Ca-rich type-Ib supernova 2005E (Perets et al. 2010, Nature 465, 322), although 2011ft was two magnitudes brighter (absolute mag approximately -17) at discovery. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2011 CBAT 2011 September 25 (CBET 2826) Daniel W. E. Green