[IAUC] CBET 937: 20070422 : SUPERNOVA 2007bk

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                                                  Electronic Telegram No. 937
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 2007bk
     M. Dennefeld, Insitut d'Astrophysique de Paris; S. Benetti, A.
Harutyunyan, I. Agnoletto, M. Turatto, and H. Navasardyan, Osservatorio
Astronomico di Padova, INAF; J. P. Troncin, Observatoire de Haute-Provence
(OHP); and A. Boselli, Laboratoire d'Astrophysique de Marseille, report
that a spectrogram of 2007bk (cf. CBET 933), obtained on Apr. 22.05 UT
with the OHP 1.93-m telescope (+ Carelec spectrograph; range 370-700 nm,
resolution 0.6 nm), shows it to be a type-Ia supernova.  Assuming a
recession velocity of 9650 km/s (Sloan Digital Sky Survey Data Release 2;
via NED) for the host galaxy, the 'PASSparToo' comparison code (Harutyunyan
et al. 2005, ASP Conf. Ser. 342, 258) provides the best fit with spectra of
1991T-like supernovae around 50 days after maximum light.  This, together
with the magnitude reported on CBET 933 for this supernova, would imply a
very luminous event.


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                         (C) Copyright 2007 CBAT
2007 April 22                    (CBET 937)               Daniel W. E. Green