[vsnet-campaign-dn 4818] EG Aqr: Humps just above the quiescence

[uemuram at hiroshima-u.ac.jp]

EG Aqr: Humps just above the quiescence

    We observed EG Aqr, rapidly faded from the superoutburst 
last week, with the High-Speed CCD Camera attached to the KANATA 
1.5m telescope at Higashi-Hiroshima Observatory on Nov. 24.

    The object was already faint at Rc=18.3-17.9, about 1 mag 
brighter than its quiescence.  Our observation covers an orbital 
period, in which large humps were detected.  The hump profile 
apparantly has double peaks with amplitudes of 0.3-0.4 mag.  
The nature of those humps is unclear, but an orbital hump, 
superhump, and late superhump may be mixed. 
The light curve can be seen at:
  http://home.hiroshima-u.ac.jp/~uemuram/egaqr/061124.jpg

    While the object is faint now, the large humps may be 
detectable with 30-50cm class telescopes.  Close monitoring 
is still required for those humps and also for possible 
rebrightening in near future.

Regards,
Makoto Uemura, Kei Sugiyasu, Daisaku Nogami, Akira Arai