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The transient OT J213806.6+261957 in Pegasus showed an outburst in 2010 and an unexpected new outburst in 2014. The system has been classified as a SU UMa system and as a possible member of the WZ Sge subclass. The present paper reports about the spectroscopic monitoring of OT J213806.6+261957 (secured at Loiano Observatory, Italy) during the 2014 outburst and the potential of the system as a gravitational wave emitter. Since the system has an orbital period of 82 minutes and is at a distance of 70 pc only, it could be a strong gravitational source for the forthcoming space based interferometers.

The transient OT J213806.6+261957 in Pegasus - Possible emitter of gravitational waves