[vsnet-chat 2305] Re: GM Sgr

["William S G Walker" <astroman@voyager.co.nz>]

Greetings, All,

I didn't get a chance to look at GM Sgr as last night was cloudy. But V803
Cen is now declining from what seems to be its version of a superoutburst -
thanks for the warning. I managed photometry on Sep 14 (to a very low
altitude) and Sep 15. Probably the last chance of the season.

I don't know much about GM Sgr - does anyone have a period or anything? 

Regards,
Stan

----------
> From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
> To: vsnet-chat@kusastro.kyoto-u.ac.jp
> Subject: [vsnet-chat 2304] Re: GM Sgr
> Date: Thursday, September 16, 1999 8:13 PM
> 
> > Arne asked if there were other CV's with less than one
> > day outbursts. V803 Cen is one - but it is going
> > through repeated outbursts on a 23.7 hr outburst
> > period -bang-bang-bang-bang!
> 
>    V803 Cen is an object of a slightly different class.  It belongs to
> helium CVs (I believe there is at least a certain degree of consensus
> they are extremely close binaries having helium white dwarfs as
mass-donors).
> 
>    Well, being an X-ray binary (not a CV), the rapid evolution of GM Sgr
> is not a striking wonder.  Though the class has been only recently
recognized,
> there is a class of "short transients", which usually have time scales
> less than 1 day.  CI Cam is a prototypical example.
> 
>    http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Xray/cicam.html
> 
> Regards,
> Taichi Kato
>

VSNET Home Page

Return to Daisaku Nogami

---

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