[vsnet-alert 21567] ASASSN-17of: new SU UMa type dwarf nova

Tonny Vanmunster tonny.vanmunster at gmail.com
Wed Nov 8 04:57:52 JST 2017

Dear colleagues,

I have just concluded the analysis of my 2017, Nov 07/08 unfiltered CCD photometry sessions of ASASSN-17of. Observations were made at CBA Belgium Observatory,  using a 0.40-m /f10.0 telescope and STT-3200ME CCD camera. The sky initially was clear, but after approx. 1.5hrs became overcast.


The resulting light curve shows the presence of a superhump with an amplitude of 0.21 mag. Due to the very short duration of my session, it is difficult to establish an accurate superhump period. A very preliminary analysis, using the ANOVA method (Peranso), yields a superhump period of 0.066 +/- 0.006d, but additional observations are required to more precisely determine Psh. The object clearly is a new SU UMa-type dwarf nova, and was at mag 16.0 (unfiltered) on Nov 7th.

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


Follow-up observations are strongly recommended.

Best regards


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

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