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IAUC 7018: 1998eb; 1998dw; NOVAE IN NGC 221, M31; C/1995 O1

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                                                 Circular No. 7018
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 1998eb IN NGC 1961
     S. Jha, P. Garnavich, P. Challis, and R. Kirshner, Harvard-
Smithsonian Center for Astrophysics, report that a spectrum of SN
1998eb, taken by P. Berlind on Sept. 19.5 UT with the F. L. Whipple
Observatory 1.5-m telescope (+ FAST spectrograph), reveals it to be
a type-Ia supernova, three to four weeks after maximum light.  The
recession velocity of the host galaxy is 3900 km/s, measured via a
narrow emission line of H-alpha.
     A. V. Filippenko and D. C. Leonard, University of California
at Berkeley, report that a CCD spectrum (range 340-1000 nm)
obtained on Sept. 20 with the Shane 3-m reflector at Lick
Observatory shows that SN 1998eb (cf. IAUC 7016) is a type-Ia
supernova, a few weeks past maximum brightness.


SUPERNOVA 1998dw IN ANONYMOUS GALAXY
     Filippenko and Leonard also report that a CCD spectrum
obtained on Sept. 21 with the Shane 3-m reflector shows that SN
1998dw (cf. IAUC 7007) is a type-Ia supernova, a few weeks past
maximum brightness.


NOVAE IN NGC 221 AND M31
     Filippenko and Leonard confirm two of the recent novae in NGC
221 (cf. IAUC 7004) and M31 (cf. IAUC 7015).  Prominent Balmer
emission lines are visible in the spectra (range 430-690 nm), and
the spectrum of the latter is of sufficient quality to reveal Fe II
emission as well.


COMET C/1995 O1 (HALE-BOPP)
     Ephemeris extension to IAUC 6942 (elements MPC 32410):

1998 TT     R. A. (2000) Decl.   Delta     r    Elong. Phase    m1
Sept.24     7 26.91   -61 58.9   6.580   6.482   80.0    8.8   10.2
Oct.  4     7 29.34   -63 45.3   6.657   6.570   80.7    8.6   10.3
     14     7 29.69   -65 31.7   6.735   6.657   81.3    8.5   10.4
     24     7 27.54   -67 15.5   6.813   6.743   81.8    8.4   10.5
Nov.  3     7 22.44   -68 54.0   6.894   6.829   82.1    8.3   10.5
     13     7 14.0    -70 23.8   6.975   6.915   82.4    8.2   10.6
     23     7 02.0    -71 41.4   7.057   7.000   82.6    8.0   10.7

     Visual m_1 estimates:  July 29.77 UT, 9.1 (D. A. J. Seargent,
The Entrance, N.S.W., 10x50 binoculars); Sept. 1.72, 9.4 (Seargent);
16.62, 10.2 (M. Mattiazzo, Wallaroo, South Australia, 0.20-m
reflector).

                      (C) Copyright 1998 CBAT
1998 September 21              (7018)            Daniel W. E. Green

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