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IAUC 7163: 1999cb; 1999cc; V4444 Sgr

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                                                  Circular No. 7163
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)
BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 1999cb IN MARKARIAN 881
     B. H. Granslo, Institute of Theoretical Astrophysics, Oslo,
reports the discovery by Odd Trondal, Oslo, of an apparent
supernova in Mkn 881 (= MCG +7-34-28) on unfiltered CCD images
taken on Apr. 4.11 (mag 16.1), Apr. 10.05 (15.7), May 1.06 (16.8),
and May 6.00 UT (17.0).  An independent discovery has also been
reported by M. Schwartz, Cottage Grove, OR, from an unfiltered CCD
frame taken on May 8.357 (confirmed on May 11.231) with the 0.35-m
Tenagra I automated supernova patrol telescope in Sonoita, AZ, the
new star appearing at mag about 18.2.  Granslo provides the
following position and magnitude for SN 1999cb from CCD images
taken by R. J. Irgens and H. Holen on May 9.88 with the Nordic
Optical Telescope at La Palma:  R.A. = 16h25m48s.41, Decl. =
+40o20'32".4 (equinox 2000.0), V = 17.9; this is 11" west and 10"
south of the galaxy nucleus.  Schwartz provides the following
position end figures for SN 1999cb:  48s.45, 32".3.  Schwartz adds
that the new object is absent from archive images taken on 1998
June 14 and July 19 using the same equipment; the limiting
magnitude on his discovery, verification, and archive images is
about 19.


SUPERNOVA 1999cc IN NGC 6038
     Schwartz also reports his discovery of an apparent supernova
(mag about 16.3) in NGC 6038 on an unfiltered CCD frame taken on
May 8.248 UT (confirmed on May 11.234) with the Tenagra I
telescope.  The new object is located at R.A. = 16h02m42s.03, Decl.
= +37o21'34".4 (equinox 2000.0), which is about 16".8 east and 1".7
north of the galaxy nucleus.  SN 1999cc was also confirmed on a
frame taken May 11.087 by T. Boles, Wellingborough, U.K.  The new
star does not appear on either the first or the second Palomar Sky
Survey scans, and it is absent from Schwartz's archive images taken
on 1998 June 15, July 20, and Sept. 14; the limiting magnitude on
his discovery, verification, and archive images is about 19.


V4444 SAGITTARII
     Visual magnitude estimates, reported in part by J. A. Mattei,
AAVSO:  May 3.125 UT, 10.1 (M. Kohl, Laupen, Switzerland); 4.600,
10.2 (R. Carver, Wombarra, NSW); 5.385, 10.5 (R. Modic, Richmond
Heights, OH); 6.592, 10.6 (R. Stubbings, Drouin, Victoria); 9.076,
10.9 (P. Schmeer, Bischmisheim, Germany); 10.099, 11.0 (Schmeer).

                      (C) Copyright 1999 CBAT
1999 May 11                    (7163)            Daniel W. E. Green

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