[vsnet-outburst 9616] UW Tri likely early superhumps

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Wed Oct 29 10:35:25 JST 2008


UW Tri likely early superhumps

   Nakajima-san has obtained 7.5-hr time-series photometry of UW Tri,
although sometimes interrupted by clouds.  The light curve shows
the presence of modulations consistent with the superhump signal
detected in 1995.  Being a single-night photometry of low-amplitude
signal, it is still difficult to uniquely determine the period.
Either the reported superhump period or a period 1% shorter
(assuming early superhumps, but the period may be still shorter) can
explain the observed modulations.  The full amplitude of the variations
was 0.06-0.09 mag.  The best segment of the light curve indicates that
minima are sharper than maxima, resembling early superhumps in typical
WZ Sge-type dwarf novae.  If this is the case, UW Tri may have
a relatively low orbital inclination.


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