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[vsnet-campaign-v4641sgr 53] V4641 Sgr color variation on May 24

V4641 Sgr color variation on May 24

Dear Colleagues,

   We have received BVIc photometry on May 24 from Kiyota-san (Tsukuba,
Japan).  The color variation indicates that the object is significantly
bluer around the large "flare" (see Uemura-san's message).

   This tendency has been confirmed using Ouda/Kyoto simultaneous multicolor
photometry.  The variation between B and red band is slightly different
when the system showed rapid variation.  Further detailed analysis,
incorporating all observations, is intensively underteken by Uemura-san.

Regards,
Taichi Kato
VSNET Collaboration team

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