[vsnet-alert 23926] HW Boo: new SU Uma-type dwarf nova

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

Dear colleagues,

I have collected 2 nights of unfiltered CCD observations of HW Boo (2020,
Feb 02/03 and Feb 03/04) at CBA Extremadura Observatory, using a 0.40-m
f/5.1 telescope and SX-46 CCD camera, under clear skies.

The first night of observations did not reveal any periodic signal.
However, the second night (Feb 03/04) clearly shows the presence of
low-amplitude superhumps (0.05- 0.06 mag), hence establishing HW Boo as a
new SU UMa-type dwarf nova (with a chance of being a WZ Sge-type dwarf nova
- future observations will need to provide clarity). A period analysis
using the ANOVA, Lomb-Scargle and PDM methods (Peranso), yields a combined
superhump period of 0.0630 +/- 0.0019d. This is in good agreement with the
published Porb = 0.06435d (see AAVSO VSX). The object was at mag 13.7 (CV)
on Feb 4th.

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

Follow-up observations are highly recommended to 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