[vsnet-alert 9406] V4641 Sgr activity in May-June

[Taichi Kato]

   As reported by Rod Stubbings, there were at least two
short-term outbursts on May 22 and June 5.  Combining with
Swift data (ATEL #1135), the object showed active phases
recurring with time-scales of 1-2 d at least between May 20
and May 25 (possibly until June 5?).

  YYYYMMDD(UT)   mag  observer
  20070320.792  <141  (Yutaka Maeda)
  20070504.773  13.29Ic  (Seiichiro Kiyota)
  20070508.478   134  (Rod Stubbings)
  20070508.738  13.88V  (Hiroyuki Maehara)
  20070508.771  13.27Ic  (Seiichiro Kiyota)
  20070509.487   134  (Rod Stubbings)
  20070510.692  <138  (Yutaka Maeda)
  20070511.546   134  (Rod Stubbings)
  20070511.703  <138  (Yutaka Maeda)
  20070512.469   134  (Rod Stubbings)
  20070514.487   134  (Rod Stubbings)
  20070516.440   134  (Rod Stubbings)
  20070517.674  <133  (Yutaka Maeda)
  20070517.685  13.25Ic  (Seiichiro Kiyota)
  20070519.528   133  (Peter F. Williams)
  20070519.774  13.32V  (Hiroshi Itoh)
  20070520.663   128  (Yutaka Maeda)
  20070520.678   128  (Yutaka Maeda)
  20070520.705   129  (Yutaka Maeda)
  20070520.753  13.03Ic  (Seiichiro Kiyota)
  20070520.753  13.08Ic  (Seiichiro Kiyota)
  20070520.753  13.08Ic  (Seiichiro Kiyota)
  20070520.754  12.92Ic  (Seiichiro Kiyota)
  20070520.754  13.10Ic  (Seiichiro Kiyota)
  20070521.337  <100  (Peter F. Williams)
  20070521.506   134  (Peter F. Williams)
  20070521.694  13.36V  (Kazuhiro Nakajima)
  20070522.460   134  (Rod Stubbings)
  20070522.505   130  (Rod Stubbings)
  20070522.508   129  (Rod Stubbings)
  20070522.541   133  (Rod Stubbings)
  20070522.549   131  (Rod Stubbings)
  20070522.560   130  (Rod Stubbings)
  20070524.626   134  (Rod Stubbings)
  20070524.674   133  (Rod Stubbings)
  20070527.630  13.03C  (Kazuhiro Nakajima)
  20070527.633  13.35V  (Kazuhiro Nakajima)
  20070527.635  12.38Rc  (Kazuhiro Nakajima)
  20070531.694  13.12C  (Kazuhiro Nakajima)
  20070531.697  13.42V  (Kazuhiro Nakajima)
  20070531.701  12.44Rc  (Kazuhiro Nakajima)
  20070603.385  <119  (Rod Stubbings)
  20070604.392   133  (Rod Stubbings)
  20070605.440   127  (Rod Stubbings)
  20070605.458   127  (Rod Stubbings)
  20070605.688   136  (Yutaka Maeda)
  20070606.608  13.05C  (Kazuhiro Nakajima)
  20070606.613  13.35V  (Kazuhiro Nakajima)
  20070606.615  12.39Rc  (Kazuhiro Nakajima)
  20070606.656  <133  (Yutaka Maeda)
  20070607.685  <133  (Yutaka Maeda)
  20070609.396   133  (Rod Stubbings)
  20070609.728   136  (Yutaka Maeda)
  20070613.406   134  (Rod Stubbings)
  20070614.380   134  (Rod Stubbings)
  20070615.721  13.66V  (Hiroshi Itoh)
  20070618.369   134  (Rod Stubbings)
  20070622.656   134  (Rod Stubbings)
  20070703.367   134  (Rod Stubbings)
  20070705.642  13.59V  (Hiroyuki Maehara)
  20070709.419   133  (Rod Stubbings)
  20070710.392   134  (Rod Stubbings)