[vsnet-alert 1191] Re: CVC 151 (USNO 1425.09823278, V1251 Cyg superoutburst)

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

> It therefore seems very likely we will have to wait for another 
> bright outburst of this intriguing object, before we can decide 
> upon its precise nature and possible superhump period.

   Dwarf novae which had passed the period minimum (the orbital period
get longer then) are expected to show outbursts similar to SU UMa-type
dwarf novae (Politano et al.).  The main difference of these objects
from normal SU UMa stars is the extremely low accretion rates (<10^-2 times
lower).  The outburst recurrence times of such objects are expected to
be very long (may be longer than that of WZ Sge), so the outburst in any
given such system may be an "once-in-lifetime" event.  In attempts to
revealing such objects, early alerts are essential, may be even more
crucial than in nova cases (cf. recent vsnet-chat discussion).  We should
express special thanks to the Beijing team for promptly notifying the
outburst of this object, rather than submitting a slow journal paper.

Regards,
Taichi Kato

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