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[vsnet-alert 6959] Re: HT Cam: incredible modulations!
- Date: Mon, 31 Dec 2001 18:23:41 +0900 (JST)
- To: vsnet-alert@kusastro.kyoto-u.ac.jp, vsnet-campaign-dn@kusastro.kyoto-u.ac.jp, vsnet-campaign-ip@kusastro.kyoto-u.ac.jp, vsnet-ip@kusastro.kyoto-u.ac.jp, vsnet-outburst@kusastro.kyoto-u.ac.jp
- From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-alert 6959] Re: HT Cam: incredible modulations!
- Cc: vsnet-j@kusastro.kyoto-u.ac.jp
- Sender: owner-vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
Re: HT Cam: incredible modulations!
Dear Colleagues,
> Most strikingly, the light curve during latter half of the night
> (analysis still in progress) is dominated by modulations with a period
> of ~4 min (!). The period is close to the half of the reported (8.5 m)
> period in quiescence. If this phenomenon reflects the IP (intermediate
> polar) type modulations, this period strongly suggests that two-pole
> accretion takes place. It may be possible that a higher accretion
> rate during the outburst phase transiently modified the magnetospheric
> structure, enabling two active poles.
Correction! The period seems to be close to 8 min. [Not likely two-pole
accretion].
We have put a representative pulse light curve at:
http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet//CVs/RXJ0757/pulse.gif
The amplitude of the pulses reach 0.3-0.4 mag.
Regards,
Taichi Kato
VSNET Collaboration team
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