[vsnet-alert 24642] ASASSN-14et and ASASSN-15qr: new SU UMa-type dwarf novae; ASASSN-20kv: new (likely) WZ Sge-type dwarf nova

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

Dear colleagues,

I'm currently running a *simultaneous* unfiltered CCD photometry session on 3 targets: ASASSN-14et, ASASSN-15qr and ASASSN-20kv, with my CBA Extremadura telescope sequentially cycling through the 3 targets. 

An initial inspection of the real-time lightcurves clearly shows that both ASASSN-14et and ASASSN-15qr are new SU UMa-type dwarf novae, showing superhumps with an amplitude of 0.23 mag and 0.28 mag respectively, and a superhump period of 0.077d and 0.075d resp. 

ASASSN-20kv finally also started to show full grown superhumps with an amplitude of 0.26 mag and a period of 0.057d. Considering the long time it took for this system to develop superhumps (I have been monitoring it over the past 8 nights, without clear modulations being present), this is most likely a WZ Sge-type dwarf nova. Further analysis will tell.

All of the above are all preliminary values, which I will refine upon concluding the session.

Best regards
Tonny

--
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com