[vsolj-alert 627] XTE J1118+480

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

XTE J1118+480

　以下の報告をIAUCに送りました。

XTE J1118+480 = X-RAY NOVA IN URSA MAJOR

M. Uemura and T. Kato, Kyoto University; H. Yamaoka, Kyushu
University, on behalf of the VSNET collaboration team, report the
detection of the probable optical counterpart (unfiltered CCD
magnitude 12.92) of XTE J1118+480 (cf. IAUC 7389) on Mar 30.726 UT,
using a 0.25-m telescope at Kyoto University.  The position of this
object (measured by Yamaoka with GSC-ACT stars) is R.A. =
11h18m10s.79, Decl. = +48o02'11".2 (equinox 2000.0, the accuracy is
better than 1"), which is well within the error radius of ASM position
(IAUC 7389).  D. Buczynski (Condor Brow Observatory, UK) cofirmed
the object at unfiltered CCD magnitude 12.91 on Mar 30.863 UT.
Yamaoka further notes that within 1" of this position there is USNO_A1.0
1350.08089912 = USNO_A2.0 1350.07924726 (cataloged rmag 18.8) and no other
object can be seen on DSS-2 images within 10", which suggest that this USNO
star is possibly the quiescent counterpart of XTE J1118+480.  Further visual
estimate: Mar. 30.867, 12.5 (O. Trondal, Oslo, Norway).

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