[vsnet-alert 6837] RE: 1RXS J232953.9+062814: strong humps

["Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>]

Dear Makoto,

I have pleasure confirming your findings on 1RXS J232953.9+062814. I have
just finished (due to clouds) an unfiltered observing run on this object
(Nov 5/6, 2001), and the resulting light curve indeed is quite spectacular,
showing superhumps with an amplitude of 0.2 mag and a period of about
~0.043d.

I will make the data available on my web site later tomorrow.

With kind regards,
Tonny Vanmunster
CBA Belgium Observatory
http://vsnet.lunarpages.com/cbabelgium
email : Tonny.Vanmunster@advalvas.be


> -----Original Message-----
> From: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
> [mailto:owner-vsnet-alert@kusastro.kyoto-u.ac.jp]On Behalf Of Makoto
> Uemura
> Sent: Monday 5 November 2001 20:57 PM
> To: vsnet-campaign@kusastro.kyoto-u.ac.jp;
> vsnet-alert@kusastro.kyoto-u.ac.jp
> Subject: [vsnet-alert 6836] 1RXS J232953.9+062814: strong humps
>
>
> 1RXS J232953.9+062814: strong humps with a very short period
>
>     Our reduction of the last night data is now ongoing.  The preliminary
> light curve is very impressive.  We can see three humps with amplitudes
> of 0.3 - 0.4mag in our first 2.9 hours run.  Our period analysis
> yields the period of 0.04320(79) d.  The fast-rise slow-decline profile
> of these humps strongly indicates that these are superhumps.
> In this part of the light curve, the object rapidly faded with a rate of
> 2 mag/day.  Confirmations of the current status of this object are
> very urged.
>
>     The ~0.043 day period superhumps are the shortest one among hydrogen
> rich cataclysmic variables except for the SU UMa-type dwarf nova,
> V485 Cen.
> It is possible that the humps are double peaked and its real period is
> ~0.086 day.  If it is the case, the orbital period of this object
> may be near the lower edge of the period gap.
>
>     Anyway, it is certain that 1RXS J232953.9+062814 is very interesting
> and important object for the cataclysmic variable study.  Follow-up
> time-series observations are strongly encouraged.
>
> Regards,
> Makoto Uemura, Ryoko Ishioka, and Taichi Kato
>
>
>

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