[vsnet-alert 4714] Nova Aql 2000 = CI Aql?

[Taichi Kato <tkato>]

   In response to [vsnet-alert 4712], it has become increasingly established
that Nova Aql 2000 (present nova) is a recurrence of CI Aql in 1917.
The quiescent identification with a 0.6-day eclipsing binary with HeII
and CIII/NIII emission lines would then be interpreted as a system closely
related to supersoft X-ray source (SSXS) which repeatedly undergo
nova explosions.  The eclipse light curve and the orbital period strongly
resembles those of known SSXS and V Sge stars.  The presence of high
excitation emission lines are common among them, and CV-type recurrent
novae like U Sco.  The present opportunity in observing the eclipsing
recurrent nova in outburst should not be overweighted.  Time-resolved
photometry and spectroscopy, observations at other wavelengths (esp.
soft X-rays) are uegently encouaraged.  The VSNET collaboration team
will continue focusing on this object, and we heartily appreciated
efforts from world-wide observers to cover the full orbital period.

Regards,
Taichi Kato
Makoto Uemura
and the VSNET collaboration team

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