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The person to talk to is Kent Honeycutt. His Roboscope has been running for about two decades now, looking at several hundred dwarf novae with a decent CCD system. He has some great long-term plots. Some of his results have been published; there are things like stunted outbursts that occur, and I can easily believe that very fast outbursts or precursor outbursts are equally likely. Arne Gary Poyner wrote: > I stand by Mike's observations of these outbursts. Most of > the data we have on these faint CV's are from photometry > obtained during a superoutburst, or long'ish normal outbursts. > The precursor outburst is very often short lived (1 day or > possible shorter) & seldom studied (as are post outburst > brightenings). Also who's to say that some of these objects > can't undergo very short duration brightenings without > later leading to 'real' outbursts? > > If we knew all the answers, we'd all be making model aeroplanes! > > regards, > Gary > ------------------------------------------------------------- > Gary Poyner > garypoyner@blueyonder.co.uk > gp@star.sr.bham.ac.uk > http://vsnet.garypoyner.pwp.blueyonder.co.uk/varstars.html > "You can always tell a Brummie....but you can't tell him much"! > -------------------------------------------------------------- > ----- Original Message ----- > From: "Martin Mobberley" <MartinMobberley@compuserve.com> > To: "Mike Simonsen" <mikesimonsen@mindspring.com> > Cc: "Roger Pickard" <rdp@star.ukc.ac.uk>; "Nick James" > <ndj@blueyonder.co.uk>; "Karen Holland" <karen.holland@xcam.co.uk>; "Guy > Hurst" <guy@tahq.demon.co.uk>; "Gene Hanson" <GeneHanson@aol.com>; "Maurice > Gavin" <mgavin@ntlworld.com>; "Chris Jones" <cpj@cix.compulink.co.uk>; > "Denis Buczynski" <denis@cb978iau.demon.co.uk>; "Bill Worraker" > <w.worraker@ntlworld.com>; "Mark Armstrong" <fw04@dial.pipex.com>; "Gary > Poyner" <garypoyner@blueyonder.co.uk>; "[unknown]" > <Tonny.Vanmunster@cbabelgium.com>; "David Boyd" <DRSBoyd@compuserve.com>; > "Hazel McGee" <HazelMcGee@compuserve.com>; "[unknown]" > <vsnet-outburst@kusastro.kyoto-u.ac.jp>; "aavso discussion" > <aavso-discussion@informer2.cis.McMaster.CA>; "[unknown]" > <vsnet-chat@kusastro.kyoto-u.ac.jp> > Sent: Thursday, May 29, 2003 10:33 AM > Subject: Re: V589 Her not in outburst > > > Message text written by "Mike Simonsen" > >>However, I have also reported observations that seem to be precursors to a > > later verified report of an outburst. The last outburst of V402 And was > reported by me some days before Chris Jones/Gary Poyner verified the event, > and most recently I made an observation of TW Vir a couple days before > everyone else agreed it was in outburst.< > > > Hi All, > Re. the V402 And event of September 2000, I remember it well. > Gary sent the following on Sept 18th 2000: > -------------------------------- > >>I have received a report for Mike Simonsen in the USA that V402 And >>(Var 62 And) may have been glimpsed at magnitude 15.0 on Sep 18.166UT. > > >>The position for this Recurrent Object is... > > >> 00h 11m 07.3 +30,32'36" (2000.0) > > >>Mag 15 is on Mike's limit, and he emphasises his uncertainty of the >>observation. If anyone can secure a CCD image of the field this >>evening, this would be great! If it ever clears here, I'll check >>visually too! > > >>Thanks, >>Gary > > ------------------------------- > It was cloudy on Sept 18th & 19th for me, but others with CCDs found it was > not in > outburst. However, on the 20th I imaged the field and there it was, at > about 15.7. > I have always thought that Mike's glimpsing of it on Sept 18.166 and it > then being > in outburst on the 20th (my image was 2000 Sept 20.816) must be more than > just > coincidence........... > > Regards, > Martin > > > > >
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