Superhump periods in the UGSU-type dwarf nova SDSSp J082409.73+493124.4

TL;DR

This paper reports the first observed superoutburst of the UGSU-type dwarf nova SDSSp J082409.73+493124.4, analyzing its superhump periods and light curve behavior to classify and understand its outburst characteristics.

Contribution

It provides the first detailed analysis of superhump periods and light curve evolution in SDSSp J082409.73+493124.4, confirming its UGSU classification and identifying orbital and superhump periods.

Findings

Confirmed UGSU classification through superhump period analysis

Identified transition from common to late superhumps

Estimated orbital period at 0.0687 days

Abstract

We present observations and analysis of the first reported superoutburst of the dwarf nova SDSSp J082409.73+493124.4 during February/March 2007. From a maximum observed magnitude of 15.4C it declined at 0.09 mag/d for 7 days, flattened out around magnitude 16 for a further 5 days and then returned rapidly to quiescence at magnitude 19.4. The flattening of the light curve late in the outburst was not associated with a re-growth of superhumps. For the first 5 days we observed common superhumps with period 0.06954(5) d, thus confirming its classification as a UGSU-type dwarf nova. This was followed by a phase transition to late superhumps with period 0.06921(6) d. We found a small but persistent signal at 0.0687(6) d which we interpret as the orbital period.