[vsnet-alert 7571] CW Mon: (probable) eclipse detection by Kiyota-san

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

CW Mon: (probable) eclipse detection by Kiyota-san

Dear Colleagues,

   Kiyota-san (Tsukuba, Japan) obtained time-series CCD photometry of
CW Mon during the current (relatively rare) outburst.

   An eclipse-like fading (depth 0.2 mag in V, duration ~40 min) was clearly
recorded in Nov. 3 long observation.  Although the feature became less
sharp, a similar fading was observed on Nov. 4.  These observations,
together with the suggested large inclination (Szkody and Mateo 1986,
AJ, 92, 483), suggest that these fadings correspond to grazing eclipses
as seen in U Gem.  Since the orbital period has not been yet exactly
established to make an ephemeris (the period by Szkody and Mateo was
derived from a single-night IR observation), long (prefrerably 4 hours
until dawn) nightly observations are strongly encourged to unambiguously
identify the (probable) eclipses.  We are very looking forward to receiving
further observations.

Regards,
Taichi Kato
VSNET Collaboration team

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