[vsnet-alert 22440] ASASSN-18td: 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, Aug 22/23 and Aug 23/24 (still ongoing) unfiltered CCD photometry sessions of ASASSN-18td. Observations were made at CBA Extremadura Observatory (Spain),  using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under moderate skies. 

 

The resulting light curve of both nights reveals the presence of superhumps with an amplute of 0.4 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 0.0756 +/- 0.0004d.  The object was at mag 16.1 (CV) on Aug 24th.  

 

Observations will be sent 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

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