[vsnet-outburst 8125] Re: [vsnet-alert 9603] NSV01485 superoutburst and 1998 QZ Vir (T Leo)phenomenon

[Eddy Muyllaert]

Accidentally V630 Cyg showed an short (precursor?) outburst 11 days before 
the start of the current superoutburst.

Regards,
Eddy Muyllaert (MUY)
Oostende
Belgium
eddy.muyllaert1 at pandora.be

----- Original Message ----- 
From: "Taichi Kato" <tkato at kusastro.kyoto-u.ac.jp>
To: <suuma at yahoogroups.com>; <variable_star_forum at yahoogroups.com>; 
<vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp>; <vsnet-alert at yahoogroups.com>; 
<vsnet-campaign-dn at ooruri.kusastro.kyoto-u.ac.jp>; 
<vsnet-outburst at ooruri.kusastro.kyoto-u.ac.jp>; 
<vsnet-outburst at yahoogroups.com>
Sent: Saturday, September 22, 2007 8:51 AM
Subject: [vsnet-alert 9603] NSV01485 superoutburst and 1998 QZ Vir (T 
Leo)phenomenon


>   As many of the readers have already been informed, the current outburst
> of NSV01485 is a genuine superoutburst (superhumps detected by Tonny
> Vanumnster).
>
>   Yet more to note:
>
> http://bigdenru.livejournal.com/
>
>   The 10-day interval between the precursor and main superoutburst sounds
> a bit unusual to me, too.  A similar combination of outbursts was recorded
> during the 1998 outburst of QZ Vir (T Leo).  The object underwent a 
> supposed
> precursor outburst on 1998 Apr 2 and a superoutburst followed 10 days 
> later
> (1998 Apr 12).  This outburst was even more unusual in that the second
> outburst (superoutburst) was possibly accompanied by a immediate precursor
> (but see vsnet-alert 1680 for Schmeer's discussion).
>
>   It would be worth studying if similar phenomenon was recorded during the
> current outburst of NSV01485.  Knowing the absence of superhumps during
> the first outburst, the present outburst might have been triggered by
> a different normal outburst, as (inconclusively) suggested from the 1998
> QZ Vir (T Leo) phenomenon (or superhumps developed during the 10-d 
> interval??)
>
> http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert1000/msg00662.html
> http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert1000/msg00663.html
> http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert1000/msg00664.html
> http://www.kusastro.kyoto-u.ac.jp/vsnet/Mail/alert1000/msg00676.html
>
>  The SU UMa-type dwarf nova T Leo may be undergoing a superoutburst,
> apparently preceded by the "second" precursor on Apr. 12.  Another
> precursor-like, bright normal outburst was observed on Apr. 2-3.
> Follow-up observations, esp. time-resolved photometry, are strongly
> encouraged.
>
>  YYMMDD(UT)   mag  observer
>  980411.648  <119  (T. Watanabe)
>  980411.894  <142  (G. Poyner)
>  980412.890   105  (J. Pietz)
>  980412.908   104  (P. Schmeer)
>  980414.151   114  (G. Hanson)
>  980414.562   108  (R. Stubbings)
>  980414.577   105  (P. Nelson)
>  980414.819   103  (J. Pietz)
>