[vsnet-alert 25753] MASTER OT J183342.09+654019.1: new SU UMa-type dwarf nova

Fri Apr 23 02:16:03 JST 2021

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of MASTER OT
J183342.09+654019.1, obtained on 2021, Apr 21/22 at CBA Belgium Observatory,
using a 0.40-m f/10.0 telescope and QHY268M CMOS camera under clear skies. 

Regular superhumps with an amplitude of 0.26 mag are clearly visible in the
resulting light curve, establishing MASTER OT J183342.09+654019.1 as a new
SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle,
Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined
superhump period of 0.0791 +/- 0.0003d. The object was at mag V = 15.8 on
Apr 21st.

I will send my observations to AAVSO, CBA and VSNET for further analysis.

Best regards
Tonny

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

PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.com