Central Bureau for Astronomical Telegrams

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IAUC 7871: 2002cc; 2002cd; 2002bt

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                                                  Circular No. 7871
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2002cc IN ANONYMOUS GALAXY
      W. D. Li, University of California at Berkeley, reports the LOTOSS
(cf. IAUC 7514) discovery of an apparent supernova (mag about 18.5) on
unfiltered CCD images taken with the 0.8-m Katzman Automatic Imaging
Telescope (KAIT) on Apr. 4.2 and 9.3 UT.  SN 2002cc is located at R.A. =
8h34m01s.97, Decl. = +55d39'12".4 (equinox 2000.0), which is 1".2 west and
5".3 north of the nucleus of an anonymous galaxy located about 65" west and
73" north of UGC 4470.  A KAIT image of the same field on Mar. 25.3 UT showed
nothing at this position (limiting mag about 19.5).

     T. Boles, Coddenham, Suffolk, reports his independent discovery of this
supernova at mag 17.2 on a 30-s unfiltered CCD image taken on Apr. 8.876 UT
(limiting mag 18.5) with a 0.35-m Schmidt-Cassegrain reflector, in the course
of the U.K. Nova/Supernova patrol.  He provides end figures 02s.11, 12".5
and notes that the object is not present on his images from 2001 Dec. 10
(limiting mag 19.0), 2002 Jan. 17 or Feb. 16.  It is also not present on
Palomar Sky Survey images taken on 1997.908 (red, limiting mag 21.0) and
1991.110 (blue, limiting mag 20.5).


SUPERNOVA 2002cd IN NGC 6916
     M. Armstrong, Rolvenden, Kent, reports his discovery of an apparent
supernova (mag 17.5) on an unfiltered CCD image (limiting mag 19.0) taken
with a 0.35-m Schmidt-Cassegrain telescope on Apr. 8.157 UT in the course of
the U.K. Nova/Supernova patrol.  The new object is confirmed at mag 17.0 on
an image taken on Apr. 9.04 and is located at R.A. = 20h23m34s.42, Decl. =
= +58d20'47".4 (equinox 2000.0), or approximately 10" east and 10" north of
the center of NGC 6916.  The new object is not present on Armstrong's images
from 2001 July 15 (limiting mag 19.5), Nov. 1 and Nov. 10 (both limiting mag
19.0), or on Palomar Sky Survey images taken on 1989.573 (blue, limiting
mag 22.5) and 1991.527 (red, limiting mag 20.8).


SUPERNOVA 2002bt IN UGC 8584
     T. Matheson, S. Jha, P. Challis and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that a spectrum (range 370-750 nm) of
SN 2002bt (cf. IAUC 7862), obtained by M. Calkins on Apr. 3.42 UT with
the F. L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph), shows it
to be a type-Ia supernova two weeks after maximum.

                      (C) Copyright 2002 CBAT
2002 April 9                   (7871)              Brian G. Marsden

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