[vsnet-alert 1139] Re: AB Dra entering standstill?

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

   AB Dra has risen again, as indicated by the compilation in [vsnet-obs 6743]
(http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-obs/msg06743.html).

   According to the reports to VSNET, AB Dra seems to show two types of
"standstill-like" activity.  One is the pause in the descending branch
of outburst.  This bears all the characteristic of short standstills of
ither Z Cam stars.  Typical examples occurred around 1997 May 15-20.

   The other is the period of remarkably decreased outburst amplitudes,
during which the amplitudes are about 1 mag, but maintaining rather regular
outburst pattern.  Typical examples occurred in 1996 Apr. and 1997 Feb.-May.

   For more dedicated discussions, let's use vsnet-chat.

Regards,
Taichi Kato

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