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[vsnet-alert 7275] Re: V589 Her : a new UGSU-type dwarf nova !
- Date: Sun, 7 Apr 2002 17:19:37 +0900 (JST)
- To: vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp, vsnet-campaign-dn@ooruri.kusastro.kyoto-u.ac.jp, vsnet-outburst@ooruri.kusastro.kyoto-u.ac.jp
- From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
- Subject: [vsnet-alert 7275] Re: V589 Her : a new UGSU-type dwarf nova !
- Sender: owner-vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp
Re: V589 Her : a new UGSU-type dwarf nova !
In combination with the quiescent identification (cf. vsnet-alert
6070, 6071, 6073 etc.), the amplitude (~3 mag) of the outburst may be
somewhat too small for an SU UMa-type superoutburst (the low outburst
frequency seems to preclude an ER UMa-type object).
There may be a possibility that the true quiescence is fainter than
inferred from DSS/USNO/Henden magnitudes, or that the present modulations
have a different nature from usual superhumps (lower amplitude, more
irregular profile), or that the object may be an unusual SU UMa-type
system. Further observations of the present outburst are extremely
important in discriminating these possibilities.
New outburst images have been already transferred to Yamaoka-san for
more detailed outburst astrometry.
Regards,
Taichi Kato
VSNET Collaboration team
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