[vsnet-alert 21863] ASASSN-16og: new SU UMa type dwarf nova

Tonny Vanmunster tonny.vanmunster@gmail.com via vsnet-alert vsnet-alert at ooruri.kusastro.kyoto-u.ac.jp
Wed Feb 14 08:20:16 JST 2018

Dear colleagues,

I have just concluded the analysis of my 2018, Feb 13/14 unfiltered CCD photometry session of ASASSN-16og. Observations were made at CBA Belgium Observatory,  using a 0.40-m f/10.0 telescope and STT-3200ME CCD camera, under a very clear sky. The resulting light curve clearly shows the presence of superhumps with an amplitude of 0.27 mag. A period analysis using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined superhump period of 0.0615 +/- 0.0005d, hence establishing this object as a new SU UMa type dwarf nova. The object was at mag 15.55 (unfiltered) on Feb 13th.  


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


Note that ASASSN-16og previously was known as ASASSN-16av, but that ASAS-SN identifier had also been given to SN 2016ac, so the new ID ASASSN-16og has been assigned to this object (see https://www.aavso.org/vsx/index.php?view=detail.top <https://www.aavso.org/vsx/index.php?view=detail.top&oid=469638> &oid=469638). In today’s announcement of the ASASSN-16og outburst, the ASAS-SN staff still refers to this object as ASASSN-16av.

Best regards


Tonny Vanmunster
CBA Belgium Observatory

CBA Extremadura Observatory – NEW !!!
 <http://www.cbabelgium.com> www.cbabelgium.com
 <http://www.peranso.com> www.peranso.com

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