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IAUC 7125: 1999ap, 1999aq, 1999ar; C/1995 O1

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                                                  Circular No. 7125
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)

     L. G. Strolger, University of Michigan; L. C. Ho, Carnegie
Observatories; R. Covarrubias, Cerro Tololo Interamerican
Observatory (CTIO); M. Hamuy, Steward Observatory; R. C. Smith,
CTIO; and the rest of the Nearby Galaxies Supernova Search team,
along with G. Aldering, R. Knop, T. York, and M. Kim (Lawrence
Berkeley National Laboratory) on behalf of the Supernova Cosmology
Project, report the discovery of three supernovae in R-band images
taken with the Kitt Peak 0.9-m telescope (+ MOSAIC imager) during
their searches on Feb. 21-25 and Mar. 5-9 UT.

   SN       1999 UT      R.A. (2000.0) Decl.      R
   1999ap   Feb. 20    8 29 47.46  + 4 37 38.5   19.4
   1999aq   Feb. 20    9 35 40.48  - 4 55 23.2   18.8
   1999ar   Mar.  6    9 20 16.00  + 0 33 39.6   19.7

SN 1999ap appears to be a type-II supernova at redshift 0.04,
exhibiting a well-developed H-alpha P-Cyg profile, based on a
spectrum (range 400-800 nm) obtained on Mar. 5.3 by G. Aldering
with the MDM 2.4-m telescope.  A spectrum (range 400-1000 nm) of SN
1999aq taken by A. V. Filippenko and W. D. Li (University of
California at Berkeley) on Mar. 9 with the Keck II telescope shows
that the supernova is of type Ia at a redshift of roughly 0.05,
observed approximately 1 month past maximum brightness.  SN 1999ar
is confirmed to be a type-Ia event, observed near maximum
brightness, at a redshift of 0.15 based on a spectrum (range
320-890 nm; total exposure 4500 s) obtained by B. Schmidt (Mount
Stromlo and Siding Spring Observatories) on Mar. 10.6 with the ANU
2.3-m telescope (+ Double Beam Spectrograph).  Finding charts for
the three objects (identified as NB-102, NB-175, and NB-187,
respectively) can be obtained from

     Total visual magnitude estimates:  Jan. 18.45 UT, 10.5 (D. A.
J. Seargent, The Entrance, N.S.W., 25x100 binoculars); Feb. 4.44,
11.0 (Seargent, Cowra, N.S.W., 0.25-m reflector); 13.40, 11.1 (S.
T. Rae, Te Awamutu, New Zealand, 0.11-m reflector); Mar. 9.53, 11.7
(A. Pearce, Nedlands, W. Australia, 0.41-m reflector); 14.50, 11.6
(M. Mattiazzo, Wallaroo, South Australia, 0.20-m reflector).

                      (C) Copyright 1999 CBAT
1999 March 15                  (7125)            Daniel W. E. Green

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