[vsnet-alert 20017] V503 Cyg: precursor?

[Taichi Kato]

V503 Cyg: precursor?

   Alexandra Zubareva and A. Zaostrojnyh have reported
observations on July 27 and 28.  The object was fading
rather rapidly.  There were some hint of emerging
superhumps in July 28.
Considering that the object underwent a superoutburst
in early May (however, see below), the present outburst
is likely a superoutburst.  Zubareva's observations may have
detected growing superhumps (stage A) during
the precursor.
Further observations are encouraged, since observations
in May were rather insufficient and some observers
suggested a long outburst in June-early July, and
we are not confident about the current phase of
the supercycle.