[vsnet-alert 23647] MGAB-V320: new SU UMa-type dwarf nova

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

Dear colleagues,

I have just concluded the analysis of my 2019, Oct 21/22 unfiltered CCD
photometry session of MGAB-V320  [see Patrick Schmeer's announcement in
vsnet-alert 23645]. Observations were made at CBA Extremadura Observatory,
using a 0.40-m f/5.1 telescope and SX-46 CCD camera, under clear skies. 

The resulting light curve clearly shows the presence of 0.25-mag superhumps,
hence establishing MGAB-V320 as a new SU UMa-type dwarf nova. Due to the
short time basis of my observation session, an accurate period analysis has
not been possible. However, using the Lomb-Scargle and PDM methods
(Peranso),  we find a combined superhump period of 0.088 +/- 0.002d. The
object was at mag 15.7 (CV) on Oct 21st. 

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

Follow-up observations are recommended to further study the evolution of
superhumps in this system. 

Best regards
Tonny

-- 
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
www.cbabelgium.com
www.peranso.com