V4641 Sgr: short-term variation recorded at Ouda Dear Colleagues, Uemura-san just sent a light curve obtained at Ouda Station, Kyoto University. The time resolution is 2.5 s. The light curve clearly shows the presence of second-scale short-term variation. I have posted the figure on the web. http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Xray/v4641sgr02.html More analysis will be (hopefully) presented by Uemura-san. Regards, Taichi Kato VSNET Collaboration team