Thursday, January 22, 2009

Superhumps!

I have just received new data from Jerry Foote (CBA Utah) who uses 60-cm telescope and receives very good quality light curves. The humps seen previously in data of Bob Koff are now even more clear having amplitude around 0.05 mag. Below you cen see the detrended Jerry's light curve of RZ LMi from last night.


Additionaly, I computed the power spectrum of this light curve and obtained clear peak at frequency 16.55 c/d which corresponds to the value of period equal to 0.0604(8) days. It roughly agrees with the period of superhumps which is 0.059396(4) days.

It looks, we have an outburst with superhumps. Another possibility is that this outburst is so-called precursor which ignites the superoutburst. Waiting for more data to clarify this situation.
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2 comments:

  1. Pomocnik Podróżnika // Travellers HelpJanuary 22, 2009 at 7:52 AM

    Is it still below its typical superoutburst magnitude?

    ReplyDelete
  2. Arkadiusz OlechJanuary 22, 2009 at 8:43 AM

    It was a quite bright outburst. Only about 0.3 mag fainter than typical superoutburst.

    ReplyDelete

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