[vsnet-alert 22921] SDSS J124602.02-202302.4: new SU UMa type dwarf nova

[Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-alert]

Dear colleagues,

I have just concluded the analysis of my 2019, Jan 03/04 and Jan 04/05 unfiltered CCD photometry sessions of SDSS J124602.02-202302.4. Observations were made at CBA Extremadura Observatory (Spain),  using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under very clear skies. This is an early morning target, so both sessions were rather short (2.6 hours each).

 

The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.36 mag, hence classifying this object as a new SU UMa type dwarf nova.  A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0838 +/- 0.0004d. The object was at mag 15.7 (CV) on Jan 05th. 

 

I will send my observations to AAVSO, CBA and VSNET for further analysis. 

 

Follow-up observations are highly recommended to further refine the superhump period.

 

Best regards
Tonny


 

Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
 <http://www.cbabelgium.com> www.cbabelgium.com

www.peranso.com <http://www.peranso.com>