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IAUC 7097: SNe; C/1999 A1

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                                                  Circular No. 7097
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)


SUPERNOVAE
     P. Garnavich, Harvard-Smithsonian Center for Astrophysics
(CfA), reports for the High-Z Supernova Search Team (cf. IAUC 6160,
6646) the discovery of 13 supernovae on CCD images taken with the
Cerro Tololo Interamerican Observatory (CTIO) 4-m telescope by N. B.
Suntzeff, R. A. Schommer, R. C. Smith, R. Covarrubias, and A.
Soderberg, CTIO; P. Challis, CfA; and B. Schmidt, Mount Stromlo and
Siding Springs Observatories.  The supernovae were identified by
subtracting images taken in early 1998 from those obtained on Jan.
13-14 UT.  The candidates were confirmed with spectra taken on Jan.
18-22 with the Keck-2 telescope by A. V. Filippenko, A. G. Riess,
and D. C. Leonard (University of California, Berkeley).

SN      1999 UT     R.A. (2000.0) Decl.      Mag       z    Type
1999K   Jan. 13    8 03 06.06 +03 24 51.6   21.5 R   0.04    II
1999L   Jan. 13    9 28 31.96 -00 19 35.9   23.2 R   0.65    Ia
1999M   Jan. 13   10 05 46.60 -07 27 31.3   23.4 R   0.50    Ia
1999N   Jan. 13   10 04 27.93 -07 35 51.1   23.3 R   0.54    Ia
1999O   Jan. 13   10 42 05.22 -00 29 00.2   24.1 R   0.21    II
1999P   Jan. 13   10 44 08.72 -00 49 04.5   21.8 R   0.06   Ib/c
1999Q   Jan. 14    8 00 45.31 +05 31 27.4   22.3 I   0.46    Ia
1999R   Jan. 14    9 28 29.26 -04 37 20.8   23.5 I   0.68    Ia
1999S   Jan. 14    9 28 08.08 -04 58 37.6   23.8 I   0.46    Ia
1999T   Jan. 14    9 27 01.77 -05 40 22.0   24.1 I   0.69    Ia
1999U   Jan. 14    9 26 42.96 -05 37 57.8   23.1 I   0.50    Ia
1999V   Jan. 14    9 29 50.15 -04 44 18.8   23.6 I   0.2?    II?
1999W   Jan. 14    4 17 46.79 -04 50 08.4   23.4 I   0.12    II

The supernovae are within 2" of their host galaxies except for SN
1999K, which is 7".6 west and 9".0 south of its host; SN 1999P,
which is 3".8 east and 8".4 north of its host; and SN 1999R, which
is 3".0 west and 1".8 north of its host.  Anyone willing to aid in
the photometric follow-up may obtain finder charts by sending
electronic mail to pgarnavich@cfa.harvard.edu.


COMET C/1999 A1 (TILBROOK)
     Visual $m_1$ estimates:  Jan. 14.08 UT, 10.3 (A. Hale,
Cloudcroft, NM, 0.41-m reflector); 16.47, 9.8 (D. A. J. Seargent,
The Entrance, N.S.W., 25x100 binoculars); 17.50, 10.3 (Seargent);
18.54, 10.6 (A. Pearce, Nedlands, W. Australia, 0.41-m reflector);
20.54, 10.6 (Pearce); 21.96, 10.7 (J. G. de S. Aguiar, Campinas,
Brazil, 0.23-m reflector).

                      (C) Copyright 1999 CBAT
1999 January 25                (7097)            Daniel W. E. Green

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