Electronic Telegram No. 882 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 2007an IN NGC 4017 A. Dimai, Cortina d'Ampezzo, Italy, on behalf of CROSS program (cf. IAUC 7373), reports the discovery by M. Migliardi of an apparent supernova on unfiltered CCD images taken with the 0.5-m Ullrich telescope of the Col Drusci Observatory at Cortina d'Ampezzo on Mar. 10.98 (at mag about 17.5; limiting mag about 19.0) and 11.95 UT (mag about 17.4; limiting mag about 19.5). The new object is located at R.A. = 11h58m43s.72, Decl. = +27o27'01".2 (equinox 2000.0), which is 24" west and 7" south of the nucleus of NGC 4017. CROSS images of the same field taken on 2006 Jan. 12 (limiting mag about 19.0) and Feb. 3 (limiting mag about 18.5) show nothing at this position, nor do Palomar Sky Survey infrared, red, and blue plates, but something seems to be present on Sky Survey red plates that may be an H II region. A. Harutyunyan, I. Agnoletto, S. Benetti, H. Navasardyan, M. Turatto, and E. Cappellaro, Istituto Nazionale di Astrofisica and Osservatorio Astronomico di Padova, report that a noisy spectrogram (range 370-770 nm; resolution 2.3 nm) of SN 2007an, obtained on Mar. 12.90 UT with the Copernicus 1.82-m telescope (+ AFOSC), shows it to be a reddened type-II supernova, probably few week after explosion. The spectrum displays a red continuum, and the H_alpha shows a broad (FWHM about 8700 km/s) asymmetric emission component. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2007 CBAT 2007 March 13 (CBET 882) Daniel W. E. Green