[vsnet-polar 56] Re: [vsnet-alert 7536] Re: [FWD] UW Pic in active state

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

Date: Wed, 02 Oct 2002 17:07:03 +0200
From: Klaus Reinsch <reinsch@uni-sw.gwdg.de>
Subject: Re: [vsnet-alert 7536] Re: [FWD] UW Pic in active state

Appearantly, there is some confusion about the optical identification of
UW Pic (= RX J0531-4624). Please, find the following information for
clarification.

The optical counterpart (later designated UW Pic) of the ROSAT All-Sky 
Survey X-ray source RX J0531.5-4624 has been spectroscopically identified 
as the most northern component of the appearant stellar triple visible
within the 3-sigma error circle of the X-ray position. The cataclysmic
variable is star "A" in Fig. 2 of Reinsch et al., A&A, 291, L27, 1994.
The triple is not resolved on the DSS image. Given a distance estimated
to be (300 +/- 60) pc, the proper motion of UW Pic should be negligible.

A copy of the original finding chart is available for download from
http://astro.physik.uni-goettingen.de/~reinsch/finding_charts/UW_Pic_fc.jpg

Sincerely yours,
Klaus Reinsch, Universitaets-Sternwarte Goettingen, Germany
reinsch@astro.physik.uni-goettingen.de


> Date: Wed, 25 Sep 2002 18:31:25 +0900 (JST)
> From: Hitoshi YAMAOKA <yamaoka@rc.kyushu-u.ac.jp>
> To: vsnet-alert@kusastro.kyoto-u.ac.jp,
>      vsnet-campaign-polar@kusastro.kyoto-u.ac.jp
> Subject: [vsnet-alert 7536] Re: [FWD] UW Pic in active state
> 
> Subject: Re: [FWD] UW Pic in active state
> 
> >The on-line cv atlas describes UW Pic (Pic1, RX J0531-4624) as an AM
> >Her star with a magnitude range between 16.4V-17.2V and a period of
> >0.09268 (1994).
> 
>   UM Pic was identified as a northern star of close (~ 3" separation)
> double (Reinsch et al., A&A, 291, L27, 1994).  The V-band image in
> Reinsch et al. suggest that a southern star itself is also a closer
> double, which cannot be separated in DSS images.  Precise astrometry
> will help to determine which is real violently oscillating object, as
> well as whether it has a notable proper motion.
> 
>   The most promising catalogued position of this object is:
> GSC-2.2.1  05:31:35.596 -46:24:05.54  R=15.86 Bj=16.83
> 
> Sincerely Yours,
> Hitoshi Yamaoka, Kyushu Univ., Japan
> yamaoka@rc.kyushu-u.ac.jp

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp