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NSV 09923: superhump period From Monard's data, we have yielded a superhump period of 0.0819(4) d. There is also strong indication of quasi-periodic oscillations (QPOs) with periods of 25 min near the superhump minima. The object now makes the second SU UMa-type dwarf nova discovered by the VSNET team from a systematic correlation search between NSV and ROSAT sources, and from intensive visual monitoring by Rod Stubbings. Congratulations to all!! The light curve will be posted on the following VSNET page: http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/DNe/nsv09923.html (This page already shows Berto's image). The measured superhump period is not particularly unusual for an SU UMa-type dwarf nova, but the apparently low outburst amplitude looks unusual, as already described in the earlier posting. It may be possible that the true quiescence is fainter than has proposed; intensive astrometry and quiescent identification is now being undertaken by Yamaoka-san. The object, suitably situated, is the current first priority target in the south for the VSNET Collaboration!! Regards, Taichi Kato VSNET Collaboration team
Return to the Daisaku Nogami
vsnet-adm@kusastro.kyoto-u.ac.jp
