[vsnet-alert 12161] Re: V4641 Sgr active

Masayuki Yamanaka myamanaka at hiroshima-u.ac.jp
Fri Sep 10 23:36:30 JST 2010


Photometry of V4641 Sgr

We performed the photometric observations of V4641 Sgr using
an optical image HOWPol attached to Kanata telescope at HHAO.
We confirmed the magnitude of V4641 Sgr as 13.5 mag in V-band.
The object would photometrically be in quiescent state.

SGRV4641  20100910.490527 13.5V
SGRV4641  20100910.492703 13.3R
SGRV4641  20100910.494716 13.1I

Yamanaka, M., Itoh, R., Komatsu, T., Sato, H. (Hiroshima Univ.)
Arai, A.(Kyoto Sangyo Univ.)

2010/9/10 Hiroyuki Maehara <mira at cetus-net.org>

>  The object was at normal brightness a few minutes before the outburst
> detection by Stubbings.
>
> object         YYYYMMDD(UT)   mag      code
> SGRV4641       20100909.42550 13.51V   Mhh.VSOLJ
> SGRV4641       20100910.43697 13.45V   Mhh.VSOLJ
>
> --
> Hiroyuki Maehara
> mira at cetus-net.org
>
> On Fri, Sep 10, 2010 at 21:27:44, Rod Stubbings wrote:
> > V4641 Sgr appears to be above its normal optical brightness as shown by
> the
> > observations tonight. Clouds prevented further obs.
> >
> > SGRV4641       100910.439   124  Stu.RASNZ
> > SGRV4641       100910.443   127  Stu.RASNZ
> > SGRV4641       100910.449   127  Stu.RASNZ
> > SGRV4641       100910.451   126  Stu.RASNZ
> > SGRV4641       100910.453   127  Stu.RASNZ
> > SGRV4641       100910.458   124  Stu.RASNZ
> > SGRV4641       100910.485   125  Stu.RASNZ
> >
> > Regards,
> > Rod.
> >
> > ________________________________
> >
> > Rod Stubbings,
> > Tetoora Observatory,
> > Tetoora Road,
> > Vic, Australia.
> > stubbo at sympac.com.au
> > http://rodstubbingsobservatory.wordpress.com/
> >
> > _________________________________
>



-- 
  Masayuki Yamanaka (D3)
  Department of Physical Science,
  Hiroshima University
  E-mail:myamanaka at hiroshima-u.ac.jp <E-mail%3Amyamanaka at hiroshima-u.ac.jp>


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