[IAUC] CBET 817: 20070122 : SUPERNOVA 2007J IN UGC 1778

Vie Jun 22 17:02:02 ART 2007

                                                  Electronic Telegram No. 817
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)
URL http://cfa-www.harvard.edu/iau/cbat.html


SUPERNOVA 2007J IN UGC 1778
     A. V. Filippenko, R. J. Foley, J. M. Silverman, University of
California, Berkeley; S. Blondin, Harvard-Smithsonian Center for
Astrophysics; and T. Matheson, National Optical Astronomy Observatory,
report that a spectrum (range 350-740 nm) of SN 2007J (cf. CBET 809),
obtained on Jan. 17.25 UT by P. Berlind with the F. L. Whipple
Observatory 1.5-m telescope (+ FAST), shows that it is probably a
peculiar type-Ia supernova similar to SN 2002cx and SN 2005hk (Li et
al. 2003, PASP 115, 453; Chornock et al. 2006, PASP 118, 722; Jha et
al. 2006, A.J. 132, 189).  Inspection of high-signal-to-noise-ratio
CCD spectra (range 320-920 nm), obtained on Jan. 21 with the Keck I
10-m telescope (+ LRIS), confirms that 2007J is a type-Ia supernova
similar to SNe 2002cx and 2005hk at approximately 2 months after
maximum brightness.  Comparison plots can be seen at the following URLs:
http://cfa-www.harvard.edu/oir/Research/supernova/spectra/sn2007J_comp.gif
and /sn2007J_Keck_comp.gif


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                         (C) Copyright 2007 CBAT
2007 January 22                  (CBET 817)               Daniel W. E. Green