[vsnet-alert 9870] 1RXS J053234.9+624755: prominent short-term variations

Makoto Uemura uemuram at hiroshima-u.ac.jp
Fri Feb 1 10:08:36 JST 2008

1RXS J053234.9+624755: prominent short-term variations

  Nakajima-san reported his time-series observations of 
1RXS J053234.9+624755 on 28 and 31 Jan to VSOLJ.
The light curves are filled by short-term variations 
(possibly superhumps?) with very large amplitudes.

Nakajima-san's site:

He commented that their amplitude reached 1.4 mag (!) on 31 Jan.

The possible brightening on 30 Jan reported in [vsnet-alert 9865] 
are probably a part of those huge short-term variations.  

The nature of these variations is unclear: They may be small 
rebrightenings or variations related to an eccentric accretion 
disk (namely, superhumps or late superhumps).  
If they are a kind of superhumps, their large amplitude implies 
a quite low contribution of the emission from an inner accretion disk.

Follow-up (time-series) observations are encouraged.

Makoto Uemura

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