[vsnet-alert 15348] OT J122221.6-311525: shorter superhump period

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Wed Feb 6 09:52:05 JST 2013

OT J122221.6-311525: shorter superhump period

   We have received more data from Josch Hambsch and Kiyota-san.
The object is still in the (second) plateau phase.
As reported earlier, the superhump period showed a transition
to a shorter period (stage C superhumps?).
The mean period since Feb. 1 was 0.07639(15) d, which is
about 0.5% shorter than the previous superhump period.
Since the fractional superhump excess of a period bouncer
is expected to be of a similar value, let's keep a closer
eye to see how this period and signal evolve.

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