[vsnet-alert 25628] CRTS J091245.9-034916 : new SU UMa-type dwarf nova

Fri Apr 2 07:07:06 JST 2021

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of CRTS
J091245.9-034916, obtained on 2021, Mar 31/Apr 01 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 0.33 mag are clearly visible in the
resulting light curve, establishing CRTS J091245.9-034916 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 0.0677 +/- 0.0007d. The object was at mag V = 15.1 on
Mar 31st.

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