[vsnet-alert 4756] CI Aql likely eclipse in outburst

[Taichi Kato <tkato>]

CI Aql likely eclipse in outburst

    As already evident in [vsnet-obs 27486] (S. Kiyota), a combined set of
time-resolved CCD photometry reported to the VSNET collaboration team
has shown an emering evidence of the presence of eclipses as predicted
in [vsnet-alert 4742].  If confirmed, this is a spectacular evidence of
eclipses in the outbursting recurrent nova, none yet observed except U Sco!
Since classical novae (even the fastest) usually do not show prominent
eclipses until they fade more than 3-4 mag below the maximum, the likely
detection of eclipses at this stage may suggest that the underlying binary
is emerging from the nova photosphere.  This may indicate either the true
maximum, a few magnitude brighter, could have been missed, or the ejecta
was thin compared to classical novae.  Further time-resolved observations
are strongly encouraged in order to verify this eclipse detection.  The
VSNET collaboration team is eargerly looking forward to receiveing further
data.

Regards,
Taichi Kato, Makoto Uemura, Katsura Matsumoto, Seiichiro Kiyota,
Rudolf Novak, Lukas Kral, Kesao Takamizawa, Minoru Yamamoto
on hehalf of the VSNET collaboration team

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