[Aavso-photometry] NSV01485 is an UGSU-type dwarf nova

[Tonny Vanmunster]

Dear colleagues,

Patrick Schmeer today announced another outburst of NSV 1485, occuring only
a few days after the end of the previous one. I spent 3 nights of photometry
covering that outburst, which turned out to be a normal one. See
www.cbabelgium.com for a lightcurve.

The sky started to clear out around 0h30m UT tonight (2007, Sep 19/20), so I
initiated an unfiltered CCD photometry session on this target, using
telescope #1 at CBA Belgium Observatory (0.35-m f/6.3 SCT, ST-7XME CCD). A
preliminary analysis of the resulting lightcurve, based on a 2.5 hrs run,
clearly reveals the presence of superhumps, hence classifying NSV 1485 as a
new UGSU-type dwarf nova. A quick period scan, using Peranso's ANOVA method,
yields a value of 0.074 +/- 0.002d, and an amplitude of about 0.15 mag. 

It is most likely that superhumps will further grow over the next nights.
Given also the small baseline of my current observations, I strongly welcome
additional CCD photometry to refine the superhump period. Evidently, V455
And should remain a prime target for all of us (telescope #2 at my
observatory is working on that one), but if you have some CCD power left,
then ...

I will post my NSV 1485 lightcurve and period analysis results on my website
later this evening. I have to get some sleep now ...

Enjoy your CV observing !

Best regards,
Tonny


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