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IAUC 7021: CATACLYSMIC Vars IN Peg; XTE J1946+274

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                                                 Circular No. 7021
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
Phone 617-495-7244/7440/7444 (for emergency use only)


CATACLYSMIC VARIABLES IN PEGASUS
     M. Modjaz, E. Halderson, T. Shefler, J. Y. King, M. Papenkova,
W. D. Li, R. R. Treffers, and A. V. Filippenko, University of
California at Berkeley, report their discovery of a variable star
(probably a cataclysmic variable) in our own galaxy during the
course of the Lick Observatory Supernova Search (cf. IAUC 6627)
with the 0.8-m Katzman Automatic Imaging Telescope (KAIT).  The
variable star was found and confirmed on unfiltered images taken on
Sept. 24.3 UT (mag about 18.4) and 25.3 UT (mag about 16.3),
respectively.  The object is located at R.A. = 23h54m39s.19, Decl.
= +28o22'49".7 (equinox 2000.0).  A KAIT image of the same field
obtained on Sept. 21.3 shows nothing at the position of the
variable star (limiting mag about 19.2), nor does the Digitized Sky
Survey image of the field shows anything in this position.
Spectroscopic classification for the object is encouraged.  A
finding chart may be found at
http://astron.berkeley.edu/~bait/cv.gif.
     X.-y. Dong, J.-y. Wei, Y.-l. Qiu, Q.-y. Qiao, and J.-y. Hu,
Beijing Astronomical Observatory (BAO), report their discovery in
the course of the BAO supernova survey of another outburst of the
cataclysmic variable noted on IAUC 6982.  The unfiltered CCD
magnitudes of the star were 15.4 on Sept. 22.5 and 17.4 on Sept.
24.5 UT.  The star was not present on a CCD image obtained on Sept.
20.


XTE J1946+274
     G. L. Israel, Osservatorio Astronomico di Roma; V. F. Polcaro,
Istituto di Astrofisica Spaziale, CNR, Rome; and S. Covino,
Osservatorio Astronomico di Brera, report:  "A 20-min slitless
multi-object spectroscopic image (range 550-800 nm, resolution 8
nm) around the position of the transient x-ray pulsar XTE J1946+274
(IAUC 7014, 7016) was obtained with the 1.5-m telescope (+ BFOSC)
at the Astronomical Observatory of Loiano on Sept. 16.92 UT.  An
H-alpha emission line (FWHM = 1.2 nm; EW = 0.13 nm) was clearly
detected from a star located at R.A. = 19h45m39s.4, Decl. =
+27o22'43" (equinox 2000.0).  Additional weaker emission lines,
possibly from He I, are present.  From CCD photometry calibrated by
Guide Star Catalog magnitudes, we obtain V = 14.3 +/- 0.3 on Sept.
16.8.  These findings strongly suggest that this emitting star
could be the optical counterpart of XTE J1946+274.  Further optical
observations of the candidate star are encouraged."

                      (C) Copyright 1998 CBAT
1998 September 26              (7021)            Daniel W. E. Green

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