[vsnet-alert 22381] ASASSN-18qo, AT 2018emz and ASSASN-13bs: 3 likely new SU UMa type dwarf novae

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

Dear colleagues,

I just finished analysing my unfiltered CCD observations of:



-          ASASSN-18qo obtained at CBA Extremadura Observatory on 2018 Aug 02/03 (clear sky) 

-          AT 2018emz obtained at CBA Extremadura Observatory on 2018 Aug 04/05 and 05/06  (clear skies)

-          ASASSN-13bs obtained at CBA Belgium Observatory on 2018 Aug 05/06 (broken clouds)

 

The light curves of these 3 objects clearly show superhump like modulations, hence establishing them as likely SU UMa-type dwarf novae. ASASSN-18qo meanwhile has been confirmed as UGSU (see vsnet reports). I have insufficient observations to securely determine the nature of the two other objects, although their SU UMa-type classification is very likely. AT 2018emz was at mag 16.3 (CV) on Aug 6th and showed a 0.27 mag modulation. ASASSN-13bs was at mag 16.9 (CV) on Aug 6th and showed a 0.39 mag modulation.

 

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

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