[vsnet-outburst 27427] ZTF21abilubd: new SU UMa-type dwarf nova

Sun Jul 4 06:03:22 JST 2021

Dear colleagues,

I have just finished analysing my unfiltered CCD observations of
ZTF21abilubd, obtained on 2021, July 01/02 and 02/03 at CBA Extremadura
Observatory, using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear
skies. My observations were triggered by Kenti Taguchi's message in
[vsnet-alert 26014].

Regular superhumps with an amplitude of 0.41 mag are clearly visible in the
resulting light curve, establishing ZTF21abilubd 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 0.0885 +/- 0.0008d. The object was at mag CV = 15.4 on
July 03rd.

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