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IAUC 7055: 1998eu, 1998ev; PKS 2005-489; 21P

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                                                 Circular No. 7055
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)


SUPERNOVAE 1998eu AND 1998ev IN ANONYMOUS GALAXIES
     A. Gal-Yam and D. Maoz, Tel Aviv University, report for the
Wise Observatory Optical Transients Search (see IAUC 6917) their
discovery of two apparent supernovae on unfiltered CCD images taken
with the Wise Observatory 1-m telescope on Nov. 14.  SN 1998eu (R =
19.7) is located at R.A. = 0h59m58s.66, Decl. = +14o18'00".4
(equinox 2000.0), which is in the field of the galaxy cluster Abell
125 (z = 0.188).  SN 1998ev (R = 21.3) is located at R.A. =
1h04m12s.68, Decl. = +25o00'59".1, which is in the cluster Abell
136 (z = 0.157).  The host galaxies of both supernovae are only
marginally detected, so no offsets can be given at this time.  Both
supernovae were invisible in images obtained in July (limiting mag
R about 22.5), but were confirmed on CCD images taken by J. Dan and
P. Ibbetson on Nov. 17 with the same telescope.  Finding charts can
be obtained via ftp://wise3.tau.ac.il/pub/avishay/sn1.fits (SN
1998eu) and /sn2.fits (SN 1998ev), or via e-mail to
avishay@wise.tau.ac.il.


PKS 2005-489
     G. Tagliaferri, G. Ghisellini, and L. Maraschi, Osservatorio
Astronomico di Brera, Milan; and P. Giommi, BeppoSAX, Rome, on
behalf of the BeppoSAX ToO collaboration on blazars, report:  "This
BL Lac object was observed with the BeppoSAX Narrow Field
Instruments from Nov. 1.318 to 2.453 UT.  The source was bright and
well visible in the Phoswich Detector System up to 100 keV.  The
preliminary analysis indicates average energy fluxes of 5.4 and 1.7
x 10E-10 erg cmE-2 sE-1 in the bands 0.1-10 and 10-100 keV,
respectively.  A broken power-law well describes the data, with
photon indices 1.95 +/- 0.03 and 2.21 +/- 0.02 below and above 2
keV, respectively.  This hard and bright x-ray flux suggests a high
flux in the GeV-TeV band, with a maximum foreseen at about 0.1 TeV
on the basis of a simple synchrotron self-Compton model.
Observations at other wavelengths are encouraged, in particular at
the highest energies."


COMET 21P/GIACOBINI-ZINNER
     Visual m_1 and coma-diameter estimates:  Oct. 25.74 UT, 8.9,
4'.4 (M. Lehky, Hradec Kralove, Czech Rep.,  25x100 binoculars);
Nov. 6.02, 8.5, 5' (J. G. de S. Aguiar, 11x80 binoculars, Campinas,
Brazil); 17.37, 8.7, 5' (S. T. Rae, Te Awamutu, New Zealand, 10x50
binoculars); 20.08, 9.0, 2'.5 (R. Keen, Mt. Thorodin, CO, 0.32-m
reflector).

                      (C) Copyright 1998 CBAT
1998 November 20               (7055)            Daniel W. E. Green

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