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CzeV404 - an Eclipsing Dwarf Nova in the Period Gap During its July 2014 Superoutburst

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Bąkowska K. , Olech A. , Pospieszyński R. , Martinelli F. , Marciniak A.

Acta Astronomica

2014

tom Vol. 64, No. 4

337--348

Results of the CCD observations of CzeV404 are presented. During the season of June-August 2014 we detected one outburst and one superoutburst of the star. Clear superhumps with the period of Psh=0.10472(2) days were observed. The superhump period was decreasing with a high value of dP/dt=-2.43(8)×10-4. From 17 eclipses we calculated the orbital period with the value of Porb=0.0980203(6) days which confirms that CzeV404 belongs to period gap objects and it is the longest orbital period of an eclipsing SU UMa star. Based on superhump and orbital period determinations, the period excess ε=6.8%±0.02% and the mass ratio q≈0.32; of the system were obtained.