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IAUC 6492: 1996bl; 1996bm; 1996 SK

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                                                  Circular No. 6492
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Postal Address: Central Bureau for Astronomical Telegrams
Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 1996bl IN ANONYMOUS GALAXY
     C. Pollas, Observatoire de la Cote d'Azur (OCA), reports his
discovery, on two films taken on Oct. 11.9 and 12.9 UT with the OCA
Schmidt telescope, of a supernova (V about 17.4) located at R.A. =
0h36m17s.97, Decl. = +11o23'40".5 (equinox 2000.0), which is 3".0
west and 5".8 north of the galaxy's center.  Nothing is visible at
this position on the original Palomar Sky Survey or on a IIIa-J
plate taken in 1987.  A nearby star (V about 16.0) is at position
end figures 19s.29, 24'09".4.
     P. Garnavich, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that spectra obtained by P. Berlind
on Oct. 16.3 UT with the 1.5-m Tillinghast telescope show that this
is a type-Ia supernova at maximum light.  H-alpha emission from the
host galaxy indicates a redshift of z = 0.036.  CCD images taken
with the Whipple Observatory 1.2-m reflector by L. Macri show SN
1996bl to be 2".4 west and 5".0 north of the galaxy's center at
magnitude V = 17.0.


SUPERNOVA 1996bm IN ANONYMOUS GALAXY
     The Mount Stromlo Abell Cluster Supernova Search Team (cf.
IAUC 6418) reports the discovery of an apparent supernova on a CCD
image taken by R. Soria on the Mount Stromlo 1.27-m telescope (+
Macho Camera).  SN 1996bm is located near Abell 2819 at R.A. =
0h44m40s.85, Decl. = -63o44'44".6 (equinox 2000.0), which is 0".3
west and 0".6 north of the nucleus of the host galaxy.  SN 1996bm
is visible at mag about 20.5 on V and R CCD images taken on Oct. 4,
and was not detected on similar frames taken on Sept. 1; a nearby
HST guide star of mag 14.1 has position end figures 39s.35,
42'16".7.  CCD images taken with the 1.7-m reflector on Oct. 10
show the supernova to be marginally brighter than on the discovery
frame.  Finder charts can be found at
http://msowww.anu.edu.au/~reiss/Abell_SNSearch.


1996 SK
     D. Rabinowitz, Jet Propulsion Laboratory, writes:
"Observations of this Apollo-type object (cf. MPEC 1996-T02),
obtained on Oct. 15 and 16 UT with the 0.61-m reflector at Table
Mountain, yield V-R about +0.73 +/- 0.04 and V-I about +0.99 +/-
0.04.  Assuming V-R = +0.367 and V-I = +0.705 for the sun, 1996 SK
reflectance colors are V-R = +0.40, V-I = +0.29.  This is much
redder than any main-belt asteroid.  Follow-up observations on a
larger telescope are urged."

                      (C) Copyright 1996 CBAT
1996 October 16                (6492)            Daniel W. E. Green

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