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IAUC 7301: 1999es; GRB 991105; 1999ek

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                                                  Circular No. 7301
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 1999es IN ANONYMOUS GALAXY
     J. Mueller reports her discovery of a supernova (mag about
18.5) on a red plate taken on Nov. 2 UT by K. Rykoski and herself
with the 1.2-m Oschin Schmidt Telescope in the course of the
Palomar Outer Solar System Ecliptic Survey.  SN 1999es is located
at R.A. = 2h32m43s.4, Decl. = +22o27'08" (equinox 2000.0), which is
12".8 west and 2" north of the host galaxy.  There is no object at
the position of SN 1999es on the Digitized Sky Survey or on a red
plate from the second Palomar Sky Survey.  A spectrum of the SN
1999es, obtained by M. Sawicki, H. Lin, T. Galema, and R. Burruss
on Nov. 4 with the Palomar 5-m Hale Telescope (+ double
spectrograph), looks like that of a type-Ia supernova, about 2
weeks after maximum.  The spectrum gives a tentative redshift of
0.07.


GRB 991105
     M. J. S. Smith and J. in't Zand, Space Research Organization
Netherlands, Utrecht; G. Tarei and M. Dadina, BeppoSAX Scientific
Operation Center, Rome; and L. Piro, Istituto di Astrofisica
Spaziale, CNR, Rome, report:  "The BeppoSAX Gamma Ray Burst Monitor
(GRBM) and Wide Field Camera (WFC unit 2) observed a gamma-ray
burst triggered on Nov. 5.6950 UT (BATSE trigger 7701).  A
preliminary analysis reveals a duration of 13 s in the GRBM, with a
peak intensity of 970 counts/s in the energy band 40-700 keV.  In
the WFC, the duration is 40 s and the peak flux is 1.1 Crab (2-28
keV).  The position of the x-ray counterpart is R.A. = 12h03m01s,
Decl. = -66o48'49" (equinox 2000.0), with a 99-percent error radius
of 3'.6.  A BeppoSAX NFI follow-up observation will not be
performed due to sun-angle constraints."


SUPERNOVA 1999ek IN UGC 3329
     L. G. Strolger, R. C. Smith, and N. B. Suntzeff, Cerro Tololo
Interamerican Observatory (CTIO); M. Hamuy, University of Arizona;
and M. M. Phillips, Las Campanas Observatory, report:  "Spectra
(range 500-900 nm) obtained by Smith on Oct. 25 UT, and by P.
Ugarte (CTIO) on Oct. 26, at the CTIO 1.5-m telescope indicate that
SN 1999ek is a type-Ia supernova that was then at or near peak
brightness.  Photometric observations made by L. Gonzalez
(University of Chile) on Oct. 26, and by Hamuy and M. Wischnjewsky
on Oct. 27, at the CTIO 0.9-m telescope show an increase in
brightness of about 0.22 mag in B, and about 0.08 mag in V."

                      (C) Copyright 1999 CBAT
1999 November 5                (7301)            Daniel W. E. Green

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