[vsnet-alert 9312] GW Lib: early superhumps, signal regrowth?

[Taichi Kato]

Dear all,

   We have received further data from Berto Monard, Higashi-Hiroshima
observatory (Uemura and Arai), and from Nakajima-san.

   Monard's data on April 16 show increased activity of short-term
variations (both quasi-periodic variations and slow modulations at
nearly Porb).  There seem to be an indication that the amplitude
of quasi-Porb variations experienced a minimum around April 15
and showed a regrowth thereafter.  This phenomenon may have been
from superposition of different peaks observed in early superhumps,
from some sort of a phase reversal (as seen in ER UMa, cf. Kato et al.
PASJ 55, 7L), or from a beat phenomenon.

   Observers are encouraged to continue obtaining time-resolved
CCD photometry as long as possible, since the early superhumps
may have not dramatically decayed as initially supposed.