[vsnet-alert 9552] Re: HS2331+3905: revised early superhump period

Hiroyuki Maehara maehara at kwasan.kyoto-u.ac.jp
Fri Sep 7 22:31:05 JST 2007


Dear colleagues,

Lubos Brat (ALTAN Observatory) kindly sent us his time-series data on
Sep. 6. The data show liner decline trend at a rate of 1.3 mag/day
and early superhumps with an amplitude of 0.4 mag.
Short period modulations reported in vsnet-alert 9548 seem to exist 
in the data.

PDM period analysis to the combined data (from BJD 2454348.518
to 2454350.658) yielded the best early superhump period of 0.05633 +/-
0.00003 days (81.12 min).

Further time-resolved observations are strongly encouraged to
clarify the nature of early superhumps and short period modulations
in this object.

If you succeed in observing, please send your time-series data to:
vsnet-campaign-report at ooruri.kusastro.kyoto-u.ac.jp

Best regards,
Hiroyuki Maehara
VSNET Collaboration Team


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