[vsnet-alert 23213] ASASSN-13at: new SU UMa type dwarf nova

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

Dear colleagues,

I have just concluded an intermediate analysis of my 2019, Apr 28/29 unfiltered CCD photometry session of ASASSN-13at. Observations were made at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and SBIG STT-3200ME CCD camera, under clear skies. My observations were triggered by the detection announcement of Maeda Yutaka on [vsnet-outburst 23634].

 

The resulting light curve clearly shows the presence of regular superhumps with an amplitude of 0.18 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 0.0892 +/- 0.0010d. The object was at mag 14.45 (CV) on Apr 28th. 

 

Observations will be further continued weather permitting and will be sent to AAVSO, CBA and VSNET for further analysis. 

 

Follow-up observations are recommended.

 

Best regards
Tonny


 

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

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