[vsnet-chat 2304] Re: GM Sgr

[Taichi Kato <tkato>]

> 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

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