NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-07-20 T12:05:39 PDT
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For refcode 2013CBET.3393A...1P:
Retrieve 2 NED objects in this reference.
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NED Abstract

Copyright by Central Bureau for Astronomical Telegrams. 2013CBET.3393A...1P Electronic Telegram No. 3393 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 2013M in ESO 325-G43 = PSN J13595668-3751494 Stuart Parker, Canterbury, New Zealand, reports the discovery of an apparent supernova (red mag 17.4) on a 30-s unfiltered CCD image (limiting mag 18.5) taken by himself on Jan. 20.671 UT with a 30-cm Astro-Tech AT12RC Ritchey-Chretien astrograph (+ ST10 camera) at his Parkdale Observatory in the course of the Backyard Observatory Supernova Search. The new object is located at R.A. = 13h59m56s.68, Decl. = -37d51'49".4 (equinox 2000.0; reference stars from USNO-B and UCAC3 catalogues), which is 11" west of the nucleus of the galaxy ESO 325-G43. Nothing is visible at this position on Digitized Sky Survey red and infrared images (limiting red magnitude > 19). Nothing visible on a 30-s image taken by Parker on Jan. 6.583 (limiting red magnitude > 18.5). Parker has posted an image that can be viewed via website URL http://tinyurl.com/bxep69a. The variable was designated PSN J13595668-3751494 when it was posted at the Central Bureau's TOCP webpage and is here designated SN 2013M based on the spectroscopic confirmation reported below. S. W. Jha and C. McCully, Rutgers University; A. Kniazev, South African Astronomical Observatory and Southern African Large Telescope; E. Hsiao, Las Campanas Observatory; and G. H. Marion, Harvard-Smithsonian Center for Astrophysics, report that a spectrogram (range 380-920 nm) of PSN J13595668-3751494 = SN 2013M, taken on Jan. 25.1 UT with the SALT 10-m telescope (+ RSS), shows it to be a type-Ia supernova, about one week before maximum light. Adopting a recession velocity of 10479 km/s for ESO 325-G43 (Theureau et al. 1998, A.Ap. Suppl. 130, 333; via NED) yields an expansion velocity of 13300 km/s from the minimum of the Si II 635.5-nm feature. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J. 666, 1024) yields good matches to the normal type-Ia supernova 2007le at six days before maximum light. NOTE: These 'Central Bureau Electronic Telegrams' are sometimes superseded by text appearing later in the printed IAU Circulars. (C) Copyright 2013 CBAT 2013 January 28 (CBET 3393) Daniel W. E. Green
Retrieve 2 NED objects in this reference.
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