CzeV404 - an eclipsing dwarf nova in the period gap during its July 2014 superoutburst

TL;DR

This study presents CCD observations of CzeV404 Her during its 2014 superoutburst, revealing superhumps, orbital period, and system parameters, confirming its classification as a period gap eclipsing dwarf nova with the longest orbital period among SU UMa stars.

Contribution

The paper provides detailed photometric analysis of CzeV404 Her's superoutburst, determining its superhump and orbital periods, and establishing its classification within the period gap as the longest orbital period eclipsing SU UMa star.

Findings

Detected superhumps with P_sh=0.10472 days.

Measured orbital period P_orb=0.0980203 days.

Estimated mass ratio q ~ 0.32.

Abstract

Results of the CCD observations of CzeV404 Her are displayed. During the season of June-August 2014 we detected one outburst and one superoutburst of the star. Clear superhumps with the period of P_sh=0.10472(2) days were observed. The superhump period was decreasing with a high value of P_dot=-2.43(8) x 10^(-4). For 17 eclipses, we calculated an orbital period with the value of P_orb=0.0980203(6) days which indicates that CzeV404 Her belongs to period gap objects and it is the longest orbital period eclipsing SU UMa star. Based on superhump and orbital period determinations, the period excess 6.8 % +/- 0.02 % and the mass ratio q ~ 0.32 of the system were obtained.