[vsnet-alert 23580] HP Cet: new SU UMa-type dwarf nova

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

Dear colleagues,

I herewith announce my independent detection of superhumps in the lightcurve of HP Cet, obtained last night (2019, Sep 25/26) at CBA Extremadura Observatory, using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under clear skies. Our observations were triggered by private email exchange with Patrick Schmeer.

 

The detrended light curve, covering a time span of 3.4 hours, clearly shows the presence of superhumps with an amplitude of 0.15 mag, hence establishing this target as a new SU UMa-type dwarf nova. At this stage, we can not (yet) distinguish signatures in the lightcurve that might point to a WZ Sge-type nature of the system, although this is likely to be expected.

 

A period analysis using the ANOVA method (Peranso), yields a superhump period of 0.0658 +/- 0.0008d. The object was at mag 14.1 (CV) on Sep 26th.

 

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

 

Follow-up observations are recommended.

 

Best regards

Tonny


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