[vsnet-chat 5540] Fw: How common is substantial, very fast variability?

[Daisaku NOGAMI <nogami@kwasan.kyoto-u.ac.jp>]

Begin forwarded message:

Date: Wed, 25 Sep 2002 16:02:16 -0600
From: Michael Rupen <mrupen@aoc.nrao.edu>
To: aavso-discussion@informer2.cis.McMaster.CA
Subject: [AAVSO-DIS] How common is substantial, very fast variability?


Dear all,

  I'm a radio astronomer, so this may be a silly question...but here goes.
I've been struck recently by a couple sources reported on VSNet which showed
extremely rapid & large optical variations (V4641 Sgr back in May, and now
UW Pic; timescales of order 1hr or less, and variations up to a magnitude).
How common is this sort of rapid variability?  and what sort of sources
exhibit it?   I'm less interested in regular variables with very short
periods, than in sources which show this sort of behavior only occasionally. 
Any references to examples, or even better to general discussions, would be
greatly appreciated!

  Thanks very much,

            Michael Rupen
            NRAO/Socorro
            mrupen@nrao.edu

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