[vsnet-alert 4546] Re: XTE J1118+480 optical counterpart

[Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>]

Dear Brian and all,

>Another salient item in re the USNO position is the epoch:  1953.187.

So I have used GSC-ACT, whose epoch is 1984.165.

>     Another solution, along with imaging good enough to see if the
>faint USNO star is visible currently, is for someeon with the right
>tools to measure the DSS2 image(s) of the faint object to see if
>there's perceptible motion.  Use Tycho-2, GSC-ACT, or USNO-A2.0 as
>the reference frame if possible.

I checked DSS1_R(1953 Mar. 10) and DSS2_R(1991 Feb. 8), and the
movement of this USNO cannot be detected.  The other star 13" ENE from
this USNO star can be slightly moved to eastward.  Of course, more
precise astrometry should be done for these plates.

Sincerely Yours,
Hitoshi Yamaoka, Kyushu Univ., Japan
yamaoka@rc.kyushu-u.ac.jp

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