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IAUC 7240: QSO 2237+0305; XTE J1859+083; N IN NGC 205

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IAUC number

                                                  Circular No. 7240
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)
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QSO 2237+0305
     A. Udalski, Warsaw University Observatory; and P. Wozniak,
Princeton University Observatory, report on behalf of the OGLE
microlensing survey team:  "OGLE monitoring of the four images of
QSO 2237+0305 (Huchra's lens) found that image C brightened by 1.2
mag in V during the last two years, reaching peak brightness in
early July 1999.  Currently the image is fading rapidly, and it is
already 0.25 mag below its peak brightness.  This may be an
indication of a caustic crossing event, in which case frequent
measurements in multiple photometric bands may provide information
on the surface brightness distribution of this quasar.  The
photometric data are at

XTE J1859+083
     F. E. Marshall, Goddard Space Flight Center (GSFC); J. J. M.
in 't Zand, Space Research Organization of the Netherlands; T.
Strohmayer, GSFC; and C. B. Markwardt, National Research Council
and GSFC, report the discovery of a transient, pulsating x-ray
source designated XTE J1859+083:  "The source was first seen with
the Proportional Counter Array on the Rossi X-ray Timing Explorer
on Aug. 8.78 UT with a 2-10-keV flux of 2 x 10**-10 erg cm**-2
s**-1.  Subsequent observations with the PCA located the source at
R.A. = 18h59m.1, Decl. = +8o15' (equinox 2000.0), with an estimated
90-percent-confidence uncertainty of 2'.  The flux is strongly
modulated with a period of 9.801 +/- 0.002 s.  The 2-10-keV flux on
Aug. 16.95 was 1.4 x 10**-10 erg cm**-2 s**-1.  Observations at
other wavelengths are encouraged."

     R. Johnson and M. Modjaz, University of California at
Berkeley, on behalf of the Lick Observatory Supernova Search (cf.
IAUC 6627, 7126), report the discovery with the 0.8-m Katzman
Automatic Imaging Telescope (KAIT) of an apparent nova in NGC 205
(M110).  The object was discovered on unfiltered CCD frames on Aug.
17.3 UT (mag about 18.1) and confirmed on similar frames taken on
Aug. 15.5 (mag about 17.5), 16.6 (mag about 18.1), and 18.3 (mag
about 19.0).  The new star is located at R.A. = 0h40m22s.65, Decl.
= +41o45'48".4 (equinox 2000.0), which is about 8" east and 280"
north of the nucleus of NGC 205.  A KAIT image of the same field on
Aug. 14.5 (limiting mag about 19.0) showed nothing at the position
of the nova.

                      (C) Copyright 1999 CBAT
1999 August 19                 (7240)            Daniel W. E. Green

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