[vsnet-alert 9242] V893 Sco superhumps?

[Taichi Kato]

   Nakajima-san has reported time-series photometry of V893 Sco
on March 13.  The mean magnitude outside the eclipses was
around 13.3-13.4.

   In addition to eclipses (depths about 0.3 mag), slow
modulations (mean amplitude about 0.2 mag) resembling superhumps
were detected.  The maximum phase does not seem to agree with
the expected timing of orbital hump.

   Although single-night observation has not yet been sufficient
to distinguish the periodicity from the orbital one, the observed
feature may be attributed to superhumps (growing stage?).
Further time-series observations to are very strongly encouraged.
Contributions from southern hemisphere are very welcomed.
If the variation is truly superhumps, strong beat phenomenon
with the orbital period is expected.  Multi-longitude observations
are thus extremely important to distinguish the periodicities.

   Please report observations to the VSNET Collaboration reporting
address: vsnet-campaign-report at ooruri.kusastro.kyoto-u.ac.jp