[vsnet-campaign-nova 122] Re: Possible Nova in Pup

[Taichi Kato <tkato>]

Re: Possible Nova in Pup

> Question No 1: Are there novae on record with a light gain of less than
> 6 magnitudes? Subluminous types?

    As most of novae are fast ones, there have been a very limited record
of very slow novae.

    The best observed one (in terms of the light curve) could be BC Cas,
10.7-17.4p.  No spectroscopic observation was made during outburst,
but the quiescence has been securely identified.  The object shows
only weak emission lines (in contrast to quiescent dwarf novae).

    BS Sgr: another slow nova with a small amplitude 9.2-17p.  Quiescent
counterpart is also identified, brighter than cataloged.

    What about V1017 Sgr?  The star is recently considered as a long-period
cataclysmic rather than a symbiotic.

> Question No 2: Is it possible that the 'nova' had been much brighter
> before its discovery.

    I think it was possible.  Located far south of the ecliptic, the
visibility from here was not so favorable before Haseda's first observation.
Perhaps southern nova searchers may have photos?

    Another possibility could be that the object is experiencing a
long-lasting premaximum phase, as was observed in DO Aql, and may brighten
further in some month ??

Regards,
Taichi Kato

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