[IAUC] CBET 2030: 20091118 : SUPERNOVA 2009ld

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                                                  Electronic Telegram No. 2030
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2009ld
     Further to CBET 2021, E. Sanders reports the following R-band magnitudes
obtained with the robotic 1-m altazimuth telescope at Apache Point Observatory
in New Mexico:  Nov. 4.82 and 6.86 UT, suspect visible, but with poor focus;
5.86, 18.32; 9.86, 18.15; 15.85, 18.16.  She also measures the position of
2009ld to be R.A. = 22h49m48s.38, Decl. = +11o38'46".3 (equinox 2000.0).
     J. M. Silverman, M. T. Kandrashoff, A. J. L. Morton, and A. V.
Filippenko, University of California, Berkeley, report that inspection of a
low-signal-to-noise-ratio CCD spectrum (range 380-980 nm), obtained on Nov. 18
UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows that
2009ld is a type-II supernova; H-alpha emission is much stronger than the
absorption component.  Cross-correlation with a library of supernova spectra
using the "SuperNova IDentification" code (SNID; Blondin and Tonry 2007, Ap.J.
666, 1024) indicates that SN 2009ld is most similar to the type-IIP supernova
2004et about nine days past maximum brightness.  Narrow emission features
from the supernova's host galaxy reveal it to have a recession velocity of
about 7600 km/s.


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                         (C) Copyright 2009 CBAT
2009 November 18                 (CBET 2030)              Daniel W. E. Green