[vsnet-alert 22522] ASASSN-18um: 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 2018, Sep 10/11 and 11/12 unfiltered CCD photometry sessions of ASASSN-18um. Observations were made at CBA Belgium Observatory,  using a 0.40-m f/10.0 telescope and STT-3200ME CCD camera, under very clear skies. 

 

The resulting (detrended) light curve clearly reveals the presence of superhumps with an amplitude of 0.13 mag, hence classifying this object as a new SU UMa type dwarf nova. A preliminary period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0575 +/- 0.0003d.  The object was at mag 16.3 (CV) on Sep 12th.  

 

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

 

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