[vsnet-alert 22360] ASASSN-18qf: likely new WZ Sge type dwarf nova

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

Dear colleagues,

I have just concluded the analysis of my 2018, Jul 31/Aug 01 unfiltered CCD photometry session of ASASSN-18qf. Observations were made at CBA Extremadura Observatory (Spain),  using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under a very clear sky. 

 

The resulting detrended light curve shows the presence of a double-waved superhump structure most likely pointing to the WZ Sge-type nature of this dwarf nova. To be confirmed through further observations. The superhumps have an amplitude of 0.07 mag (only). A period analysis using the ANOVA and PDM methods (Peranso), yields a very preliminary superhump period of 0.0604 +/- 0.0010d. The object was at mag 14.1 (CV) on Jul 31st. 

 

Astrometry: 17h 10m 33.87s, +16° 18’ 52.5” (with 0.2” residual).


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

 

Follow-up observations are strongly recommended to analyse this system.

Best regards
Tonny


 

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

www.peranso.com <http://www.peranso.com>