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IAUC 7885: C/2000 S5; 2002cl, 2002cm, 2002cn, 2002co

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                                                  Circular No. 7885
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)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


COMET C/2000 S5
     T. Makinen, Finnish Meteorological Institute, Helsinki,
reports the discovery of another apparent comet (cf. IAUC 7327)
from the second systematic survey of hydrogen Lyman-alpha emission
appearing on SWAN images (wavelength range 10-180 nm) taken from
the SOHO spacecraft during September-November 2000 (discovery
observation below).  Makinen notes that all comets brighter than
total visual mag approximately 11 can be seen on the SWAN full-sky
maps.  The stated uncertainty in the reported positions is 0.5
degree due to the resolution of the SWAN instrument.

     2000 UT           R.A. (2000) Decl.       m1
     Sept. 19.658     11 35.9      -12 13     11.6

Further positional and orbital information, together with an
ephemeris to encourage searches of archival optical images, are
given on MPEC 2002-H41.  Derived total visual magnitudes from the
Lyman-alpha fluxes (using a formula by Jorda et al. 1992, Asteroids,
Comets, Meteors 1991, 285):  2000 Sept. 21.77 UT, 10.8; Oct. 1.42,
10.0; 5.23, 9.4; 7.35, 8.4; 10.38, 7.7; 12.45, 7.3; 14.37, 7.5;
17.40, 7.8; 21.38, 7.9; Nov. 4.42, 8.2.


SUPERNOVAE 2002cl, 2002cm, 2002cn, 2002co
     G. Altavilla and S. Benetti, Osservatorio di Padova, and their
colleagues (cf. IAUC 7780) report the discovery of four supernovae
on CCD frames taken on Apr. 7/8 (via comparison with reference
images having limiting mag about 24 taken with the same equipment
at previous observing runs) during their search with the ESO/MPI
2.2-m telescope.

SN          R.A. (2000.0) Decl.     V       Offset       Type   z
2002cl  13 44 09.94  - 0 12 57.8   21.6  2".7 W, 1".4 S   Ic  0.072
2002cm  13 52 03.67  -11 43 08.5   22.3  1".6 W, 6".1 N   II  0.087
2002cn  13 53 21.24  -12 15 29.5   22.3  0".8 W, 0".7 N   Ia  0.302
2002co  14 10 53.04  -11 45 25.0   22.6       --          II  0.318

No parent galaxy was visible in the reference image of SN 2002co.
Spectra obtained on Apr. 21 with the ESO 8.2-m KUEYEN Very Large
Telescope (+ FORS2) reveal the types and redshifts listed above.
From the spectral features, it is estimated that SN 2002cl was
about 3 weeks after maximum, SN 2002cm was several weeks after
maximum, and SN 2002cn was a few days after maximum.  SN 2002co
shows Balmer emissions similar to those of SN 1996L when close to
maximum (Benetti et al. 1999, MNRAS 305, 811).

                      (C) Copyright 2002 CBAT
2002 April 25                  (7885)            Daniel W. E. Green

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