[vsnet-alert 11481] PG 0149+138 = SDSS J015151.87+140047.2 unusual period evolution?

[Taichi Kato]

PG 0149+138 = SDSS J015151.87+140047.2 unusual period evolution?

   Maehara-san has reported observations on Sep. 16.  The superhumps
on this night can not be well expressed by the earlier period.
There appears to have been either a phase shift or a period increase,
rather than a decrease.  A period increase in such a long Psh-system
is quite rare (the only candidate systems include unusual long-Psh
SU UMa-type dwarf novae V725 Aql and SDSS J170213.26+322954.1).
Further observations (as well as those in the observational gap between
Sep. 14 and 16) are keenly needed.