Hatena::Groupkanatatmp

KANATA ObsLog

2009-10-02

[] V455 And: high-speed photometry

f:id:kanataobslog:20091002195021p:image

f:id:kanataobslog:20091002195020p:image

We performed high-speed photometry of the dwarf nova, V455 And on 23 Sep with a time-resolution of 5 sec. The upper and lower panel show the light curve and power spectrum, respectively. In the light curve, the vertical dotted lines indicate the orbital period of V455 And (~4865 s). As can be seen in the power spectrum, a sharp spike at 0.01484 Hz (67.39 s) is present, which is probably a spin period of the white dwarf. Another noteworthy feature is a signal around 0.003516 Hz (~284.4 s). The overall feature of the light curve is analogous to that observed before the outburst (Araujo-Betancor et al. 2005)