Electronic Telegram No. 2251 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION CBAT Director: Daniel W. E. Green; Room 209; Dept. of Earth and Planetary Sciences; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbat@iau.org; cbatiau@eps.harvard.edu URL http://www.cfa.harvard.edu/iau/cbat.html SUPERNOVA 2010bp IN PGC 50706 F. Bufano, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova (INAF-OAPd); M. Turatto, Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Catania; and S. Benetti, INAF-OAPd, on behalf of a larger collaboration, report that a spectrogram (range 350-1000 nm, resolution 1.4 nm) of 2010bp (cf. CBET 2240), obtained on April 17.12 UT with the New Technology Telescope (+ EFOSC2), shows it to be a type-Ia supernova around ten days after maximum. An expansion velocity of about 12500 km/s is measured from the minimum of the Si II 635.5-nm absorption line, after correcting for the host-galaxy recession velocity of 2911 km/s (Koribalski et al. 2004, A.J. 128, 16). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 April 18 (CBET 2251) Michael Rudenko