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[vsnet-campaign-v4641sgr 31] V4641 Sgr large-amplitude variation!

Date: Fri, 24 May 2002 11:31:13 +0900 (JST)
To: vsnet-campaign-v4641sgr@ooruri.kusastro.kyoto-u.ac.jp
From: Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>
Subject: [vsnet-campaign-v4641sgr 31] V4641 Sgr large-amplitude variation!
Sender: owner-vsnet-campaign-v4641sgr@ooruri.kusastro.kyoto-u.ac.jp

V4641 Sgr large-amplitude variation!

Dear Colleagues,

    We have stared analyzing the Kyoto data last night (observer: R. Ishioka).
The object showed a deep minimum around 23.755 UT, with a depth of 0.7 mag
and duration of 0.01 d (with a "V"-shaped profile).  During this period,
violent variations became less prominent.  This phenomenon may be somehow
related to a 0.5 mag "dip"-like fading observed by Berto Monard on May 23.
Further analysis is in progress.

Regards,
Taichi Kato
VSNET Collaboration team

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