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IAUC 6978: 1998df; 1998dg; 1998dh; 1998aq

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                                                 Circular No. 6978
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
Phone 617-495-7244/7440/7444 (for emergency use only)


SUPERNOVA 1998df IN ANONYMOUS GALAXY
     J. Maza, Department of Astronomy, University of Chile, reports
the discovery of an apparent supernova (B about 18.5) by R.
Antezana on a T-Max 400 film taken by L. E. Gonzalez using the
Maksutov telescope at Cerro El Roble on July 18.058 UT.  SN 1998df
is located at R.A. = 21h32m30s.57, Decl. = -65o03'32".8 (equinox
2000.0), which is 1".7 west and 6".8 south of the nucleus of the
host spiral galaxy.  SN 1998df is also present on films obtained on
July 1.175 (B about 18.0) and June 1.350 (B about 17.5).  Several
films obtained during 1997 show no object at the position of SN
1998df (B > 20).


SUPERNOVA 1998dg IN MCG -3-34-008
     Maza also reports the discovery of an apparent supernova (B
about 17.5) by Marina Wischnjewsky on a film taken (as above) on
July 19.063 UT.  SN 1998dg is located at R.A. = 13h10m23s.85, Decl.
= -16o56'08".1 (equinox 2000.0), which is 17".5 west and 17".1
south of the nucleus of MCG -3-34-008.  The new star was confirmed
on direct CCD images by E. Costa (University of Chile) on July 24.9
using the 0.91-m telescope at Cerro Tololo; a preliminary estimate
of the magnitude is B about 16.  The object is not present on a
film obtained on June 18.042 (B > 20).


SUPERNOVA 1998dh IN NGC 7541
     W. D. Li, M. Modjaz, E. Halderson, T. Shefler, J. Y. King, R.
R. Treffers, and A. V. Filippenko, University of California at
Berkeley, report their discovery of an apparent supernova during
the course of the Lick Observatory Supernova Search (cf. IAUC 6627)
with the 0.8-m Katzman Automatic Imaging Telescope (KAIT).  SN
1998dh was found and confirmed in unfiltered CCD images obtained on
July 20.5 (mag about 16.8) and 24.5 UT (mag about 15.3).  The new
object is located at R.A. = 23h14m40s.31, Decl. = +4 32'14".1
(equinox 2000.0), which is about 53".5 west and 10".4 north of the
nucleus of NGC 7541.  A KAIT image obtained on July 16.5 did not
show a star at the position of SN 1998dh (limiting mag about 19.0).


SUPERNOVA 1998aq IN NGC 3982
     Additional CCD V magnitude estimates by D. Hanzl, Brno, Czech
Republic (cf. IAUC 6937):  June 17.955 UT, 14.23; 19.966, 14.4;
20.906, 14.4; 21.948, 14.3; 25.971, 14.4; 29.967, 14.45; July
20.977, 14.86.

                      (C) Copyright 1998 CBAT
1998 July 25                   (6978)            Daniel W. E. Green

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