[IAUC] CBET 1552: 20081023 : SUPERNOVA 2008gn

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                                                  Electronic Telegram No. 1552
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVA 2008gn
     EDITOR'S NOTE:  The item below replaces the text on CBET 1550
(corrected position).
     Further to CBET 1538, M. Catelan, Pontificia Universidad Catolica de
Chile; A. J. Drake, A. Mahabal, S. G. Djorgovski, M. J. Graham, and R.
Williams, California Institute of Technology; E. C. Beshore, S. M. Larson,
and R. Hill, Lunar and Planetary Laboratory, University of Arizona; and
E. Christensen, Gemini Observatory, report the CRTS discovery of a supernova
in unfiltered Catalina Sky Survey (CSS) images:

 SN       2008 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2008gn   Sep. 24.42   4 06 29.50  +14 52 14.0   17.8    10".3 E, 9".4 S

Additional magnitudes for 2008gn, from image obtained with the Palomar
1.52-m reflector (+ Gunn r filter) unless otherwise noted:  Mar. 9.13 UT,
[19.5 (CSS); Sept. 25.29, 18.1; 26.29, 18.1; 27.28, 18.0; 28.1, 18.1.  The
faint host galaxy is seen in co-added images from the Palomar-Quest survey.
A noisy spectrogram was obtained with the SMARTS 1.5-m telescope on Oct.
2.25 and exhibits broad features consistent with a supernova.  J. M.
Silverman, B. E. Cobb, M. McCourt, and A. V. Filippenko find that 2008gn
is a type-Ia supernova from an optical spectrum obtained on Oct. 22.42
using the Kast spectrograph on the Lick 3-m telescope.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 October 23                  (CBET 1552)              Daniel W. E. Green