[IAUC] CBET 1124: 20071109 : SUPERNOVA 2007op

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                                                  Electronic Telegram No. 1124
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 2007op
     R. Quimby, California Institute of Technology; F. Yuan and C.
Akerlof, University of Michigan; and J. C. Wheeler, University of
Texas, report the discovery of a supernova in unfiltered CCD images
taken on Oct. 20.22 (at mag about 18.7) and Nov. 4.20 UT (mag about
18.5) using the 0.45-m ROTSE-IIIb telescope at the McDonald
Observatory.  The new object is located at R.A. = 1h53m12s.36, Decl.
= +33o44'34".0 (equinox 2000.0), which is 2".4 east and 2".6 south
of the center of the apparent host galaxy.  SN 2007op was found by
subtracting a co-addition of images taken between Aug. 9 and Sept. 8
(limiting mag about 19.0).  A spectrum (range 420-890 nm) of 2007op
, obtained on Nov. 8.33 with the 9.2-m Hobby-Eberly Telescope (+
Marcario Low-Resolution Spectrograph) by S. Odewahn and A. Westfall,
shows it to be a type-Ia supernova; the spectra are similar to those
of SN 1994D at about 11 days after maximum light (Patat et al. 1996,
MNRAS 278, 111).  HET spectra of the host galaxy indicate a redshift
of z = 0.085.


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                         (C) Copyright 2007 CBAT
2007 November 9                  (CBET 1124)              Daniel W. E. Green