Electronic Telegram No. 471 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) CBAT@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/iau/cbat.html SUPERNOVA 2006bp IN NGC 3953 R. Quimby, University of Texas; and P. Brown, Pennsylvania State University, report that a spectrum (range 420-890 nm) of SN 2006bp (cf. IAUC 8700), obtained on Mar. 11.11 UT with the 9.2-m Hobby-Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by J. Caldwell and S. Rostopchin, shows that it is likely a young type-II supernova. The spectrum has a blue continuum and shows a narrow absorption line at 592 nm, consistent with Na I in the NGC 3953 rest frame, and a narrow emission line consistent with rest-frame H-alpha (possibly superimposed from the host). There is also a broad absorption line around 627 nm, and a narrow but slightly broadened emission line at 583 nm. Quimby adds SN 2006bp was not detected in unfiltered ROTSE-IIIb images taken on Apr. 9.15 (limiting mag about 16.9), but it was found at about 15.3 mag on images taken on Apr. 10.15. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2006 CBAT 2006 April 11 (CBET 471) Daniel W. E. Green