Electronic Telegram No. 2110
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://www.cfa.harvard.edu/iau/cbat.html


SUPERNOVA 2009nq IN NGC 7549
     W. Zheng and F. Yuan, University of Michigan; J. Vinko, University of
Szeged; R. Quimby, California Institute of Technology; D. Chamarro, M. D.
Sisson, N. Whallon, C. Akerlof, and S. B. Pandey, University of Michigan;
J. C. Wheeler and E. Chatzopoulos, University of Texas; and G. H. Marion,
Texas A&M University and University of Texas, on behalf of the ROTSE
collaboration, report the discovery of a new supernova (mag about 16.2) in
unfiltered images taken on 2009 Dec. 28.09 UT with the 0.45-m ROTSE-IIIb
telescope at McDonald Observatory.  The new object, which was observed again
on 2010 Jan. 3.06 (at mag 15.3) and Jan. 5.07 (mag 15.2), is located at R.A.
= 23h15m16s.97, Decl. = +19o01'22".5 (equinox 2000.0; uncertainty about 1"),
which is 4".2 west and 67".9 south of the center of the host galaxy NGC
7549; a finding chart for 2009nq can be found at the following website URL:
http://www.rotse.net/rsvp/j231517.0+190122/j231517.0+190122.jpg.
     A spectrum, obtained on Jan. 4.32 with the 9.2-m Hobby-Eberly Telescope
(+ Marcario Low-Resolution Spectrograph) by S. C. Odewahn, shows 2009nq to
be a type-Ia supernova around maximum.  According to SNID (Blondin and Tonry
2007, Ap.J. 666, 1024), the spectrum best resembles those of SN 2002er
(at 2.5 days before maximum) and SN 1994S (at 1.4 days after maximum) at
redshift z = 0.018, consistent with the redshift of NGC 7549 (z = 0.0157).
The photospheric velocity, estimated from the minimum of the Si II 635.5-nm
feature, and corrected for the host-galaxy redshift, is about 10200 km/s.


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                         (C) Copyright 2010 CBAT
2010 January 5                   (CBET 2110)              Daniel W. E. Green