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

[Taichi Kato]

   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)