[vsnet-alert 15364] OT J122221.6-311525: further data on shorter superhump period

[Taichi Kato]

OT J122221.6-311525: further data on shorter superhump period

   Berto Monard has reported further observations.
It has become even clearer that a period shortening occurred
around Jan. 30.  The period after this epoch is 0.07650(3) d,
0.4% shorter than stage B(?) superhumps.

  YYYYMMDD(UT)   mag  observer
  20130105.583  <153  (Rod Stubbings)
  20130111.560   134  (Rod Stubbings)
  20130113.585   124  (Rod Stubbings)
  20130114.551   123  (Rod Stubbings)
  20130115.546   123  (Rod Stubbings)
  20130116.628   125  (Rod Stubbings)
  20130117.578   124  (Rod Stubbings)
  20130119.615   123  (Rod Stubbings)
  20130201.506   124  (Rod Stubbings)
  20130204.521   127  (Rod Stubbings)
  20130205.557   128  (Rod Stubbings)
  20130206.583   129  (Rod Stubbings)
  20130206.714   128  (Andrew Pearce)
  20130207.532   128  (Rod Stubbings)
  20130208.624   127  (Rod Stubbings)