The orbital and superhump periods of the dwarf nova SDSS J093249.57+472523.0

TL;DR

This study presents photometric observations of the dwarf nova SDSS J093249.57+472523.0 during its 2011 outburst, measuring its orbital and superhump periods, confirming its classification as an SU UMa type, and analyzing eclipse characteristics.

Contribution

First detailed measurement of orbital and superhump periods for SDSS J093249.57+472523.0, confirming its SU UMa classification and providing insights into its eclipse properties.

Findings

Superhump period Psh = 0.06814 days

Orbital period Porb = 0.06630 days

Superhump period excess epsilon = 0.028

Abstract

We report unfiltered CCD photometry of the eclipsing dwarf nova SDSS J093249.57+472523.0 obtained during its first confirmed outburst in 2011 March. The outburst amplitude was at least 3.0 magnitudes above mean quiescence and it lasted at least 11 days, although we missed the beginning of the outburst. Superhumps having peak-to-peak amplitude up to 0.3 magnitudes were present during the outburst, thereby establishing it to be a member of the SU UMa family. The mean superhump period was Psh = 0.06814(11) d. Analysis of our measurements of eclipse times of minimum, supplemented with data from other researchers, allowed us to measure the orbital period as Porb = 0.06630354(5) d. The superhump period excess was epsilon = 0.028(1) which is consistent with of SU UMa systems of similar Porb. The FWHM eclipse duration varied between 6 and 13 mins and the eclipse depth was up to 1.6 magnitudes.