[vsnet-alert 10491] Re: OT_J020025.4+441019: more on early superhumps
Pavol A. Dubovsky
var at kozmos.sk
Thu Sep 4 00:32:23 JST 2008
Dear friends,
I found period 0.0575d in the data taken last night. The amplitude of
light variations was around 0.15 mag. See
http://var.kozmos.sk/Slovakia_obslog.php?obs_id=&projekt=%&star=OTJ0200
Clear skies!
Pavol A. Dubovsky
AO Kolonica
Taichi Kato wrote / napísal(a):
> OT_J020025.4+441019 (new WZ Sge-type dwarf nova in And)
>
> According to Ka-Dar page, the following light curves have been obtained.
>
> http://www.ka-dar.ru/forum/index.php/topic,1274.0.html
>
> Although the curve is slightly irregular, the "B" curve (lower)
> shows fadings by 0.05 mag separated by 1.5 hour. Sharper minima
> (than maxima) are characteristic to WZ Sge-type early superhumps.
> Assuming 20 cycles between these observations on two nights,
> the period of the early superhumps (=orbital period) is 0.0554 d.
> Further continuous observations are urgently requested because
> the amplitudes of early superhumps tend to decay very quickly.
>
> For more information on early superhumps, see e.g.
>
> http://adsabs.harvard.edu/abs/2001PASJ...53.1191K
> http://adsabs.harvard.edu/abs/2002PASJ...54L..11K
>
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