[vsnet-alert 17082] SDSS J090221.35+381941.9: early superhumps again?

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Tue Mar 25 13:47:43 JST 2014

SDSS J090221.35+381941.9: early superhumps again?

   Roger Pickard, Colin Littlefield, Enrique de Miguel,
William Stein, Kiyota-san, Pavol A. Dubovsky and 
Kyoto team (Ohshima and Kato) have reported observations.
An analysis of the data of the last two nights yielded 
a period of 0.03363(1) d with a double-humped profile 
characteristic to early superhumps!  The present period 
is now becoming close to the orbital period, and we 
may be observing early superhumps again.
This is very unusual behavior! (competition between
the 2:1 and 3:1 resonance??)

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