[Aavso-photometry] NSV 1485 - refined superhump period based on CBA observations

[Tonny Vanmunster]

Dear colleagues,

I have been able to further refine the superhump period of NSV 1485, based
on two long observation sets, obtained last night (2007, Sep 21/22) by CBA
New Mexico (Tom Krajci) and CBA Belgium Observatory (Tonny Vanmunster). The
two sets cover a total of 1059 observations, over a time span of 16.7 hours,
with only a small gap in between the two sets. 

Combined with my Sep 19/20 obs, the CBA dataset for NSV 1485 now comprises
1191 superoutburst observations. Using Peranso's implementation of the ANOVA
method (A. Schwarzenberg-Czerny), I find a superhump period of 0.07421 +/-
0.00010d. This is slightly shorter than the value I found on Sep 19/20, but
which was based on a *much* shorter timeline. 

The amplitude derived from all CBA observations is about 0.18 mag. The phase
diagram shows a small dip on the descending branch of the superhump
modulation, but I'm not sure how to interpret this. Further observations
might tell.

The full analysis results are presented on my website : www.cbabelgium.com

Keep on observing NSV 1485, whenever V455 And allows you to do so.

Best regards,
Tonny

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