[Aavso-photometry] ASAS 102522-1542.4 : are these early superhumps ?

[Tonny Vanmunster]

Dear colleagues,

Pojmanski's ASAS3V instrument is keeping us busy these days ! While ASAS
023322-1047.0 is still performing "main stage", another ASAS object is
asking for our attention as well. The good thing about this newly discovered
ASAS object (ASAS 102522-1542.4) is that you can start observing it after
ASAS 023322 has set.

I have meanwhile 2 CBA observation sets of ASAS 102522-1542.4 data : one
obtained by Tom Krajci, and one by myself, yielding a total of 922
observations. Another unfiltered CCD photometry session on ASAS 102522 is
ongoing at CBA Belgium Observatory, at this very moment. 

A light curve and period analysis of the above observation sets, reveals the
presence of a weak modulation with a period of 0.061 +/- 0.001 d, and with a
mean amplitude of 0.02 mag only. Although this modulation might be
attributed to early superhumps, it can not be concluded yet at this moment.
The low altitude of ASAS 102522 (for many observers), makes this an even
more challenging target than ASAS 023322, and we have to be careful with
atmospheric extinction effects.

I have created a webpage on ASAS 102522 on my website
http://www.cbabelgium.com, with illustrations of the analysis.

Please continue monitoring this target. It might reveal its true nature in
just a few days.

Best regards,
Tonny

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

Attend the Peranso Workshop at the SAS 2006 Symposium on May 23, 2006
http://www.socastrosci.org/Files/home.htm