[vsnet-alert 9255] V893 Sco further observation and analysis

[Taichi Kato]

   Berto Monard has reported three nights' time-series
observations.  Combining with Nakajima-san's further data,

  (1) The object primarily showed orbital humps since
JD 2454179 (four nights).

  (2) Before 2454179, likely superhump signature was observed
(four nights between JD 2454173 and 2454178).  The earlier
period determination looks like to be valid.

   The object seems to have shown transient superhump signature
during the most recent outburst (associated with an unusually
bright "spike").  This outburst may have been a "failed"
superoutburst.  The the angular momentum in the disk remains
high, we can expect a full superoutburst in near future.
Although the superhump signature has apparently disappeared,
further time-series observations are recommended to see if
it emerges again.