Electronic Telegram No. 3826 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 2014ab = PSN J13480599+0723164 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: SN 2014 UT R.A. (2000.0) Decl. Mag. Offset 2014ab Mar. 9.43 13 48 05.99 + 7 23 16.4 16.4 1".5 N Howerton reports magnitude V = 15.9 for the variable on Mar. 9.587 UT from CCD images obtained at Siding Spring, nothing that the measurement is contaminated by background light from the host galaxy. The variable was designated PSN J13480599+0723164 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2014ab based on the spectroscopic confirmation reported below. E. Y. Hsiao, M. M. Phillips, and N. Morrell, Las Campanas Observatory; C. Contreras, C. Gall, and M. D. Stritzinger, Aarhus University; G. H. Marion, University of Texas, Austin; and R. P. Kirshner, Harvard-Smithsonian Center for Astrophysics, report that near-infrared spectrogram (range 800-2500 nm), obtained on Mar. 10.25 UT with the FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade Telescope at Las Campanas Observatory, shows that PSN J13480599+0723164 = SN 2014ab is a type-IIn supernova more than a month past maximum. The spectrum resembles the FIRE spectrum of SN 2012ca taken on 2012 Apr. 30.36, with several emission lines of the hydrogen Paschen series present at an approximate redshift of z = 0.02. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2014 CBAT 2014 March 10 (CBET 3826) Daniel W. E. Green