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[vsnet-campaign 551] IX Dra (UGSU): need for more observation
IX Dra (UGSU): need for more observation
From: "Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>
Subject: [vsnet-alert 5368] IX Dra - a new UGSU type variable
Dear colleagues,
I started a CCD photometry session on IX Dra (=3D KUV18126+6704 or Dra6 =
in DW&S), about 4.5 hours ago, using the 0.35-m f/6.3 telescope at CBA =
Belgium Observatory [2000, November 04/05]. All FITS images are acquired =
with an ST-7 CCD camera without filters, and are instanteneously =
processed and reduced (PSF photometry). The resulting real-time light =
curve clearly shows the presence of a 0.22 mag modulation, to be =
attributed to superhumps. A first rough estimate of the superhump period =
yields a value of 0.070d. This value will certainly be improved as more =
observations become available in the course of the night. IX Dra =
currently is at mag 15.4 (unfiltered).
The above observations thus establish IX 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
From: "Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>
Subject: [vsnet-alert 5369] IX Dra (UGSU) - refined superhump period
Dear all,
Following my note to vsnet yesterday, regarding the detection of =
superhumps in IX Dra (vsnet-alert 5368), I herewith announce a refined =
superhump period value of 0.068 d +/- 0.001 d, based on 6.45 h of =
uninterrupted CCD photometry at CBA Belgium Observatory (November 4/5, =
2000).
Weather conditions are bad over here, for the moment, and the forecast =
is not favorable for the next nights either. Observations from other =
observatories therefore would be highly appreciated, to further study =
the outburst behaviour of this interesting UGSU type CV.
Best regards,
Tonny Vanmunster
CBA Belgium Observatory
vsnet-adm@kusastro.kyoto-u.ac.jp
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