Electronic Telegram No. 4050 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 2014dy E. Matsumoto, T. Shibata, and N. Tominaga, Konan University; T. Morokuma, Institute of Astronomy, University of Tokyo; M. Tanaka, National Astronomical Observatory of Japan; S. Fukuda, Hyogo, Japan; M. Takeishi, Hokkaido, Japan; and K. Tomita and R. Tomita, Aichi, Japan, on behalf of the Kiso Supernova Survey (KISS) collaboration, report the discovery of an apparent supernova (mag 18.8) on a g-band CCD image (limiting mag 20.6) taken on 2014 Dec. 19.38 UT with the Kiso Wide Field Camera (field-of-view 2.1 deg x 2.1 deg) on the 1.05-m Kiso Schmidt telescope at the Kiso Observatory. The new object is located at R.A. = 2h48m57s.86, Decl. = -0d45'38".5 (equinox 2000.0), which is 0".3 west and 0".2 north of a possible host galaxy at z = 0.075 (from the Sloan Digital Sky Survey DR10). Nothing is seen at this position in images taken on 2014 Dec. 18.49 (limiting mag 19.3). E. Matsumoto, T. Shibata, and N. Tominaga, Konan University; N. Ukita, H. Maehara, and M. Tanaka, National Astronomical Observatory of Japan; and T. Morokuma, Institute of Astronomy, University of Tokyo, on behalf of the KISS collabolation, report that an optical spectrogram of SN 2014dy was obtained on 2014 Dec. 23.48 UT with the Okayama 188-cm telescope (+ Kyoto Okayama Optical Low-dispersion Spectrograph). Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) shows good matches with type-Ia supernovae around maximum light. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2015 CBAT 2015 January 23 (CBET 4050) Daniel W. E. Green