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[vsnet-campaign 1030] WZ Sge: early superhump period
WZ Sge: early superhump period
Using the combined data by the Kyoto team, G. Masi, and A. Good
after HJD 2452114.8 (see the light curve in
http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/wzsge01.html),
we performed period analysis and calculated a period of early superhump
to be 0.056623 +/- 0.000027 day. It is near the orbital period, thus
we confirmed that the humps are not superhumps, but "early" superhumps.
Surprisingly, the light curve by G. Masi on July 23/24 (HJD 2452114)
only has a longer periodicity. The period seems to be around 0.057 d
as reported by G. Masi, and furthermore possibly longer than the
superhump period observed in the previous outburst. The power spectrum
of the humps are significantly distorted if we include this data although
the number of points is not large.
The gradual decline speed became more slowly. The object is fading
with 0.23mag/day, which is not atypical for superoutbursts.
The average profile of early superhumps has two peaks: minor and
major one. Their amplitude is about 0.4mag and no variation of the
amplitude is observed to date except for the first night at Kyoto.
We have updated the VSNET WZ Sge page for the minor change including
this average profile.
Regards,
VSNET Collaboration team
vsnet-adm@kusastro.kyoto-u.ac.jp
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