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[vsnet-alert 5709] CP Dra - a new UGSU type variable
- Date: Sat, 24 Feb 2001 21:35:03 -0000
- To: "cba-news" <news@cba.phys.columbia.edu>
- From: "Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>
- Subject: [vsnet-alert 5709] CP Dra - a new UGSU type variable
- Cc: "vsnet-alert" <vsnet-alert@kusastro.kyoto-u.ac.jp>, "Vsnet-Outburst" <vsnet-outburst@kusastro.kyoto-u.ac.jp>, "Vsnet-Campaign" <vsnet-campaign@kusastro.kyoto-u.ac.jp>
- Importance: Normal
- Reply-To: <Tonny.Vanmunster@advalvas.be>
- Sender: owner-vsnet-alert@kusastro.kyoto-u.ac.jp
Dear colleagues,
I'm conducting a CCD photometry session on CP Dra, using the 0.35-m f/6.3
telescope at CBA Belgium Observatory [2001, February 24/25]. FITS images are
acquired with an ST-7 CCD camera without filters, and are instanteneously
processed and reduced (aperture photometry). After 2.5 hours of working, the
resulting real-time light curve already clearly shows the presence of a 0.31
mag modulation, to be attributed to superhumps. A first rough estimate of
the superhump period yields a value of 0.0687 +- 0.0007 d.
The above observations thus establish CP Dra as a new member of the UGSU
type of cataclysmic variables !
Further high-speed photometry is highly recommended, to settle the precise
superhump period value. Support from other observatories would be highly
appreciated.
Best regards,
Tonny Vanmunster
CBA Belgium Observatory
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