[Aavso-photometry] Detection of the UGSU dwarf nova nature of SDSSJ083845.23+491055.5

[Tonny Vanmunster]

Dear colleagues,

Following the recent announcement of an outburst of SDSS
J083845.23+491055.5, I started time-series CCD observations of this target
on October 22/23, 2007 at CBA Belgium Observatory, using one of the
observatory's 0.35-m f/6.3 telescopes. I have just concluded a preliminary
analysis of my CCD observations, covering a time span of 4.5 hours. They
clearly show the presence of superhumps with an amplitude of about 0.15 mag,
hence classifying SDSS J083845.23+491055.5 as a new UGSU-type dwarf nova.
Using Peranso, I find a superhump period of 0.0721 +/- 0.0019 d.

I encourage follow-up photometry, to further determine the characteristics
of this system.

I will post my lightcurve analysis on my website at www.cbabelgium.com.

Best regards,
Tonny Vanmunster

Tonny Vanmunster
CBA Belgium Observatory
http://www.cbabelgium.com 
 
PERANSO : The Light Curve and Period Analysis Software 
http://www.peranso.com