[vsnet-alert 12027] OT J213806.6+261957: late-stage superhumps

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Tue Jun 8 15:14:52 JST 2010

OT J213806.6+261957: late-stage superhumps

   There appear to have been a discontinuous shortening of the superhump
period at around June 1 (after rapid fading).  The present period has now
become similar to the Psh around the start of stage B (i.e. the period
continuously lengthened during stage B starting with this period, and
this periodicity again appeared as in many SU UMa-type dwarf nova
during stage C).  The mean period since June 1 has been 0.054918(5) d
with a distinct hump profile.  The evolution of the superhump period
is slightly different from that of GW Lib, but may be more analogous
to that of ASAS J002511+1217.2.

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