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[vsnet-campaign-dn 1898] DM Dra - analysis of the 2001, Nov 14/15 observations - superhump period
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Dear colleagues,
A quick update on my earlier message regarding the
announcement of the SU UMa type nature of DM Dra.
On 2001, Nov 14/15, I accumulated 4.1 hours of CCD
observations (269 datapoints), clearly revealing the
presence of genuine, single-peaked superhumps with an
amplitude of 0.36 mag, and a period of 0.0734 +/-
0.0030 d (PDM technique). This value substantially
differs from the one obtained by Howell et al. during
quiescence (i.e. 125 min).
The above observations firmly establish DM Dra as a new
SU UMa type dwarf nova. Full information is available
at http://vsnet.lunarpages.com/cbabelgium
To further refine the superhump period (longer
baseline) and to study the evolution of the outburst
development, I would recommend this object to receive
sufficient attention from other observers worldwide
Thanks to Timo Kinnunen for his prompt notification of
the outburst.
Kind regards,
Tonny Vanmunster
From CBA Braeside Observatory at Flagstaff, Arizona
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