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IAUC 7463: 2000cx; XTE J1859+226; 2000cw

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IAUC number

                                                  Circular No. 7463
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)

     R. Chornock, D. C. Leonard, A. V. Filippenko, and W. D. Li,
University of California, Berkeley; and E. L. Gates and K. Chloros,
Lick Observatory, write:  "Inspection of a CCD spectrum (range
390-720 nm) of SN 2000cx (cf. IAUC 7458) obtained on July 23 UT
with the Nickel 1-m reflector at Lick Observatory reveals that the
object is a peculiar type-Ia supernova, strongly resembling the
overluminous SN 1991T a few days before maximum brightness (e.g.,
Filippenko et al. 1991, Ap.J. 384, L15).  The Fe III absorption
troughs near 430 and 490 nm are prominent, but Si II at 612 nm is
weak.  The object is in the outskirts of the host galaxy, which has
a Hubble type of S0; this is the first time that a SN 1991T-like
type-Ia object has been seen in such an early-type galaxy, in a
region devoid of obvious dust and massive stars.  Frequent
observations at all wavelengths are encouraged."
     K. Krisciunas, University of Washington (UW), reports
preliminary photometry of SN 2000cx, reduced by him from images
taken by C. Logan and T. Tavenner (UW) using the Manastash Ridge
Observatory 0.76-m reflector near Ellensburg, WA:  July 19.42 UT, V
= 14.00, B-V = +0.13, V-R = +0.01, V-I = -0.03 (uncertainties +/-
0.04 mag); July 20.43, V = 13.82, B-V = +0.16, V-R = 0.00, V-I =
-0.07 (uncertainties +/- 0.02 mag).

XTE J1859+226
     P. Rodriguez-Gil and J. Casares, Instituto de Astrofisica de
Canarias (IAC), report on optical photometry of this soft x-ray
transient (IAUC 7274, 7279):  "R-band photometry of this x-ray
transient has been recently performed with the 1.0-m Jacobus
Kapteyn Telescope on La Palma and the 0.8-m IAC-80 telescope on
Tenerife.  After the minioutburst reported on IAUC 7451, the
brightness is steeply decreasing at a rate of about 0.4 mag/day.
Measured magnitudes:  July 17.10 UT, R = 19.1; 19.92, 19.9; 21.94,
20.9; 22.93, 21.6.  Further coverage is urged both now (while in
decline) and during the following months, since a new minioutburst
may occur."

SUPERNOVA 2000cw IN MCG +5-56-007
     Corrigendum.  On IAUC 7457, lines 1-2, for  on behalf a
collaboration  read  on behalf of a collaboration known as the
'Network of European Observatories in the North (NEON) Observation

                      (C) Copyright 2000 CBAT
2000 July 23                   (7463)            Daniel W. E. Green

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