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IAUC 6531: 1996cd; 1997A

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                                                  Circular No. 6531
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/cfa/ps/cbat.html
Phone 617-495-7244/7440/7444 (for emergency use only)

     C. Pollas, Observatoire de la Cote d'Azur (OCA), reports his
discovery of an apparent supernova (V about 18.5) on films taken on
1996 Dec. 16.06 and 16.12 UT.  SN 1996cd is located at R.A. =
7h57m20s.73, Decl. = +11o12'23".7 (equinox 2000.0), which is 15".5
east and 2".3 north of the center of a spiral galaxy (and located
on the eastern arm of the galaxy).  OCA films taken on 1997 Jan.
5.08 and 5.11 show the supernova about half a magnitude fainter
than on the Dec. films.  Nothing is visible at the position of SN
1996cd on 1995 OCA films or on the original Palomar Sky Survey
prints.  A nearby star (V about 16) is at position end figures
21s.07, 34".1.

     J. Maza, Department of Astronomy, University of Chile, reports
the discovery of a supernova on a CCD image taken on Jan. 3.32 UT
with the Curtis-Schmidt telescope at Cerro Tololo Interamerican
Observatory (CTIO), as part of a new Calan/Tololo supernova search
involving P. F. Ortiz, L. Campusano, M. Wischnjewsky, and R.
Antezana, University of Chile; M. M. Phillips, N. B. Suntzeff, R.
Schommer, A. Clocchiatti, and R. Covarrubias, CTIO; and B. Schmidt,
Mount Stromlo and Siding Spring Observatories.  The supernova was
confirmed via CCD images taken by M. T. Ruiz and M. Wischnjewsky at
the 0.9-m CTIO telescope on Jan. 8.1, from which are estimated the
following magnitudes:  B = 18.52, V = 18.55.  A position for SN
1997A measured from the Digital Sky Survey is R.A. = 4h31m33s.39,
Decl. = -61o07'10".4 (equinox 2000.0); the object is located 4".9
west and 0".1 north of the host galaxy's center.  SN 1997A is not
present (to V = 20.5) on a CCD frame obtained by L. Campusano with
the Curtis-Schmidt telescope on 1996 Dec. 14.2.
     L. Wang, University of Texas; and D. Baade, European Southern
Observatory (ESO), report their preliminary inspection of a
spectrum (resolution about 0.3 nm, range 385.5-801.7 nm) of SN
1997A obtained on Jan. 8.1 UT with the ESO 2.2-m telescope (+
EFOSC2):  "The spectrum clearly shows features of Si II, S II, and
Fe III.  The redshift of the host galaxy is about 17 500 km/s, as
measured from the Ca H and K lines.  The expansion velocity, as
measured from the minimum of the Si II feature, is about 12 000
km/s after correcting for the redshift of the host galaxy.  This is
a type-Ia supernova prior to optical maximum."

                      (C) Copyright 1997 CBAT
1997 January 9                 (6531)            Daniel W. E. Green

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