NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-20 T00:27:04 PDT
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For refcode 2010CBET.2541A...1B:
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NED Abstract

Copyright by Central Bureau for Astronomical Telegrams. 2010CBET.2541A...1B Supernova 2010jn in NGC 2929 Electronic Telegram No. 2541 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Boles, T.; Newton, J.; Puckett, T. Abstract. SUPERNOVA 2010jn IN NGC 2929 The Central Bureau has received reports of the independent discoveries of an apparent supernova in NGC 2929 on unfiltered CCD images -- the first by T. Boles (Coddenham, England, 0.35-m reflector), and the second by J. Newton and T. Puckett (0.40-m reflector at Portal, AZ, U.S.A.). Boles reports the position of 2010jn as R.A. = 9h37m30s.24, Decl. = +23o09'33".3, which is approximately 5".9 east and 8".7 south of the center of NGC 2929; Puckett provides position end figures 30s.20, 33".6 (offset 4".6 east and 8".5 south of the center of NGC 2929). Available magnitudes, from unfiltered CCD images unless noted otherwise: 1995 Nov. 30, [21.0 (Digitized Sky Survey, blue plate; via Boles); 1998 Apr. 22, [20.5 (DSS, red plate; via Boles); 2009 Jan. 6, [19.5 (Boles); 2009 Oct. 4, [19.9 (Puckett); 2010 Oct. 21.160, 17.0 (Boles; discovery); Nov. 5.47, 17.2 (Newton and Puckett; discovery); 6.48, 16.9 (Puckett). Boles subsequently noted that 2010jn was reported by Howell et al. (see website URL http://www.astronomerstelegram.org/?read=2934), where they reported position end figures 30s.30, 33".6 and the following R-band magnitudes: Oct. 8.5, [20.3; 11.5, 19.6 (marginal); 12.5, 19.2 (discovery); 13.5, 18.7. Howell et al. add that a spectrogram obtained on Oct. 13 with the "Gemini North" telescope showed 2010jn to be a type-Ia supernova around 15 days before maximum light, noting that the blueshift of the Si II 635.5-nm feature indicates velocities in excess of 20000 km/s ("among the highest ever seen for non-detached features" in a type-Ia event). NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2010 CBAT 2010 November 7 (CBET 2541) Daniel W. E. Green
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