[vsnet-alert 6793] SDSSp_J173008.38+624754.7 is a new UGSU type cataclysmic variable !

["Tonny Vanmunster" <Tonny.Vanmunster@advalvas.be>]

Dear colleagues,

I have pleasure announcing the detection of superhumps in the recently
discovered SDSS dwarf nova SDSSp J173008.38+624754.7 (see Szkody et al.,
astro-ph/0110291).

I made a first attempt to do unfiltered time-series CCD photometry on this
object on October 19/20, 2001, using the 0.35-m f/6.3 telescope at CBA
Belgium Observatory. Unfortunately, the session had to be ended after 1.1
hours, due to clouds entering the sky. The resulting light curve already
showed clear signs of a modulation. I have made it available on my web site.

Tonight (October 22/23) is clear again, and allowed another unfiltered CCD
session of SDSSp J173008.38+624754.7. At the moment of this writing, I'm
tracking the variable already for 4.0 hours. The intermediate light curve is
depicted on my web site, and clearly shows a  typical superhump signature,
thus establishing SDSSp J173008.38+624754.7 as a new UGSU-type dwarf nova.

The amplitude of the system is about 0.40 mag. A preliminary analysis of the
superhump period, using the PDM technique, reveals a value of 0.0789 +/-
0.001 day.

Follow-up observations are strongly encouraged.

Kind regards,
Tonny Vanmunster
CBA Belgium Observatory
http://vsnet.lunarpages.com/cbabelgium
email : Tonny.Vanmunster@advalvas.be

PS : I have also updated my web site to include all of my WZ Sge
observations ! Have a look ...

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp