[vsnet-outburst 20502] SDSS J113551.09+532246.2: new SU UMa-type dwarf nova

[Tonny Vanmunster]

Dear colleagues,
 
I have just concluded the analysis of last night’s 2017, Feb 18/19 unfiltered CCD photometry session of SDSS J113551.09+532246.2. Observations were made at CBA Belgium Observatory,  using a 0.40-m /f10.0 telescope and STT-3200ME CCD camera, under a clear sky with some moonlight. The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.33 mag. A period analysis using the ANOVA, PDM and Lomb-Scargle methods (Peranso), yields a combined preliminary superhump period of 0.0937 +/- 0.0012d, hence establishing this object as a new SU UMa-type dwarf nova. The object was at mag 15.6 (unfiltered).

Observations will be sent to CBA and VSNET for further analysis.

Best regards
Tonny 


-- 

Tonny Vanmunster
CBABelgium Observatory
www.cbabelgium.com <http://www.cbabelgium.com> 
www.peranso.com <http://www.peranso.com> 

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