[vsnet-chat 1208] Re: V592 Her: examination of the 1986 outburst data

[Taichi Kato <tkato>]

Re: V592 Her: examination of the 1986 outburst data

Patrick Schmeer wrote:

> I think you could have missed the current outburst with your 10-cm reflector,
> too. Every time you made an estimate (especially '<12.5') V592 Her could have
> been faint (mag 13.3 or so), and the mag 12 brightness peak(s) could have
> easily occurred between your observations.

   I could have, but my upper limits for those V592 Her observations were
often conservative in the absence of the reliable sequence.  (We sometimes
adopted "minus 1 mag or 1.5 mag" strategy to convert mpg to visual sequences).
I caught the EY Cyg outburst of the same year (independent detection) using
the same instrument, when the variable was reported below mag 13 or even
below 14 by several AAVSO observers.  I included in my "list for 10-cm
telscopes" (most probably considered as crazy) FO Aql, FO Per, SV CMi etc.,
many of which fail to reach mag 13 even at maximum.  The "pathology" got
worse when I encountered an excellent 15-cm telscope, with which I observed
many dwarf novae below mag 14.5 (a retroscopective view on my data, I detected
the supercycle of RZ LMi, frequent small outbursts of HS Vir -- some of them
were caught using the 10-cm scope, and the 8-day recurrence of SS UMi).
I don't think I can do the same now, since my eyes may have been too adapted
to daylight and birds ;-)

> Btw, which dwarf novae have an amplitude in the mag 9 range?  

   Best question to ask!  Good candidates (range are from literatures, which
might easily be superseded by future observations) are PQ And (8.8 mag),
LS And (8.5 mag), UZ Boo (9.0 mag), VX For (>9.5 mag!), GW Lib (9.5 mag,
maybe slightly smaller), V4338 Sgr (>12 mag?) and to name some.

Regards,
Taichi Kato

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