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[vsnet-chat 6473] Re: [AAVSO-DIS] Re: V589 Her not in outburst

When operating at peak efficiency I routinely see visually, in real time to about mag. 16.5 (Henden Seq's). I can recount on more than one occasion singular observations of a cv that burps itself into the range that I can see it.

HT CAS is one example. On several instances I have reported it at about mag. 16 which subsequently proved to be a transient observation.  Whether these are stunted outburst , fast outburst, or precursor events, they want only for confirmation.

Such observations may or may not be outburst notice worthy for some. For myself, reported observation  such as Mike's are real elements of a cv's visual profile, even if  individuals doubt their credibility. After all, would this be the first time this sort of amateur observations has ultimately affected our comprehension the observable cosmos?

Dan

P.S. Found the abstract on a paper by Honeycutt, Robertson, and Turner on stunted outbursts at  http://cdsads.u-strasbg.fr/cgi-bin/nph-bib_query?bibcode=1998AJ....115.2527H&db_key=AST&high=3e935bef8307361  Regrettably, I was denied access the the full article.

Taichi Kato wrote:
Re: [vsnet-chat 6465] Re: V589 Her not in outburst

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.

   Although everything may be literally possible, is there any reasoning
to "believe" that very fast outbursts or precursor outbursts are equally
likely?  The stunted outbursts Kent Honeycutt referred to were
small-amplitude outbursts in novalike or post-nova systems, which are
unlike from dwarf novae in that they mostly have thermally stable accretion
disks.  The fraction of dwarf novae among RoboScope targets is much smaller
than Arne's description would suggest; their main targets have been
(poorly studied) novalike systems and occasionally dwarf novae.

Regards,
Taichi Kato

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