[vsnet-alert 8470] V4641 Sgr: Kyoto observation on June 24

[Taichi Kato]

V4641 Sgr: Kyoto observation on June 24

   We have finished a full analysis of the June 24 Kyoto observation.
The time-resolution of the observation was 8-9 sec.

   The object was rather calm compared to the late June 24 - early 25 data
reported by Berto Monard (vsnet-alert 8466), which was full of repeated
flares and a giant flash.

   The object rather monotonously faded (with small fluctuations) during
the earlier 24 observation, with a broad flare-like feature centered at
24.595 UT (0.1-0.2 mag).  The observation implies that the state of this
microquasar varied within a few hours between Kyoto and Berto's observations.

   More data and analysis will be presented by the Kyoto member.