Electronic Telegram No. 3778 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 2014D IN UGC 7170 = PSN J121036761+184935 S. Howerton, Arkansas City, KS, U.S.A.; A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams, California Institute of Technology; J. L. Prieto, Princeton University; M. Catelan, Pontificia Universidad Catolica de Chile; and E. Christensen and S. M. Larson, Lunar and Planetary Laboratory, University of Arizona, report the Catalina Real-time Transient Survey discovery of an apparent supernova in public images from the Catalina Sky Survey (CSS), with the discovery observation tabulated below: SN 2014 UT R.A. (2000.0) Decl. Mag. Offset 2014D Jan. 1.41 12 10 36.76 +18 49 35.4 17.0 3".0 W, 4".7 S The variable was designated PSN J121036761+184935 (erroneously, due to an automation error resulting from improper posting) when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2014D based on the spectroscopic confirmation reported below. Additional CCD magnitudes for 2014D: 2013 Dec. 14.48 UT, [20.0 (CSS); 2014 Jan. 6.129, 15.8 (Federica Luppi and Luca Buzzi, Varese, Italy; 0.60-m f/4.6 reflector; position end figures 36s.86, 35".6; reference stars from CMC-14 catalogue; image posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_U7170.jpg E. Y. Hsiao, M. M. Phillips, and N. Morrell, Las Campanas Observatory; G. H. Marion, University of Texas, Austin; C. Contreras, C. Gall, and M. D. Stritzinger, Aarhus University; and R. P. Kirshner, Harvard-Smithsonian Center for Astrophysics, report on the spectroscopic classification of PSN J121036761+184935 = SN 2014D using a near-infrared spectrogram (range 800-2500 nm) obtained on Jan. 9.37 UT with the FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade Telescope at Las Campanas. The near-infrared spectrum shows that 2014D is a type-Ia supernova. The spectrum resembles the near-infrared spectrum of SN 2011fe at maximum (Hsiao et al. 2013, Ap.J. 766, 72). The supernova redshift approximately matches the redshift of the presumed host galaxy (UGC 7170) at z = 0.00818 (Giovanelli et al. 1997, A.J. 114, 122). L. Tartaglia, A. Pastorello, S. Benetti, E. Cappellaro, L. Tomasella, P. Ochner, N. Elias-Rosa, and M. Turatto, Osservatorio Astronomico di Padova, Istituto Nazionale di Astrofisica, report that an optical spectrogram (range 340-820 nm; resolution 1.3 nm) of PSN J121036761+184935 = SN 2014D, obtained on Jan. 9.09 UT with the Asiago 1.82-m Copernico Telescope (+ AFOSC), shows that it is a type-Ia supernova. Adopting for the host galaxy (UGC 7170) a redshift z = 0.00818 (Giovanelli et al. 1997, A.J. 114, 122; via NED), a good match is obtained with the normal type-Ia supernova 1994D (Patat et al. 1996, MNRAS 278, 111) at two days before B-band maximum light. The expansion velocity of the ejected material, as inferred from the position of the minimum of the Si II line at 635.5 nm, is 10300 km/s. The Asiago classification spectra are posted at website URL http://sngroup.oapd.inaf.it; classification was made via GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383) and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 January 13 (CBET 3778) Daniel W. E. Green