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IAUC 7495: 2000dm; V1333 Aql; 2000db

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                                                  Circular No. 7495
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 617-495-7440/7244/7444 (for emergency use only)

SUPERNOVA 2000dm IN UGC 11198
     A. B. Aazami and W. D. Li, University of California at
Berkeley, on behalf of the Lick Observatory Supernova Search (cf.
IAUC 6627, 7126), report the discovery of an apparent supernova
(mag about 16.1) on an unfiltered image taken with the 0.8-m
Katzman Automatic Imaging Telescope (KAIT) on Sept. 24.1 UT.  SN
2000dm, which was confirmed on an earlier image taken on Sept. 16.1
at mag about 18.5, is located at R.A. = 18h18m58s.97, Decl. =
+16o14'53".4 (equinox 2000.0), which is 3".6 west and 4".7 south of
the nucleus of UGC 11198.  A KAIT image of the same field taken on
Sept. 11.1 showed nothing at the position of the new object
(limiting mag about 19.0).

     R. Jain, C. Bailyn, and P. Coppi, Yale University; M. Garcia,
Harvard-Smithsonian Center for Astrophysics; A. Levine,
Massachusetts Institute of Technology; J. Orosz, Utrecht University;
P. Lu, Western Connecticut State University; and J. Espinoza and D.
Gonzalez, Cerro Tololo Interamerican Observatory (CTIO), report on
YALO consortium observations:  "Aquila X-1 = V1333 Aql appears to
be beginning a new optical outburst.  This x-ray binary outbursts
approximately once per year (e.g., 1999 May 8.3 UT; cf. IAUC 7161),
and was due to erupt.  We have been monitoring this source since
2000 Apr. 11 in R using the YALO 1-m telescope at CTIO.  Compared
to the quiescent average magnitude, which has a fluctuation < 0.1
mag, the source had brightened in R by 0.45 +/- 0.02 mag on Sept.
22.15.  The R-band brightness continued to increase, reaching 0.62
+/- 0.02 and 0.71 +/- 0.03 mag above quiescence on Sept. 23.01 and
24.17, respectively.  The amplitude of this outburst is larger than
the peak from recent mini-outbursts (IAUC 7429, 7423, 7017).  We
will continue monitoring this source at optical, infrared, and
x-ray (using RXTE) wavelengths.  Observations at all wavelengths
are encouraged."

SUPERNOVA 2000db IN NGC 3949
     CCD R magnitudes from K. Hornoch, Lelekovice, Czech Republic:
Aug. 20.823 UT, 13.7; 26.804, 13.8; 27.796, 13.7; 29.810, 13.9;
Sept. 9.788, 14.2; 10.791, 14.3; 23.758, 14.4.  CCD V magnitude
from D. Hanzl, Brno, Czech Republic:  Aug. 29.82, 14.7 +/- 0.1.

                      (C) Copyright 2000 CBAT
2000 September 25              (7495)            Daniel W. E. Green

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