[vsnet-alert 18759] V404 Cyg: rapid variation recorded by visual observers

[Taichi Kato]

V404 Cyg: rapid variation recorded by visual observers

   Such violent variations are only rarely seen in all
astrophysical objects (the only other examples include
V4641 Sgr).  Let's look it visually, too.
Such variations may weaken if the object further brightens
to the full outburst maximum.  So it is the chance now.

   Results of time-series CCD observations will be
reported by Kimura-san.

   We should note that in ATel strongly likely intrinsic
polarization has been reported.

  YYYYMMDD(UT)   mag  observer
  20150615.978  <141  (Eddy Muyllaert)
  20150616.169  16.18C  (Eddy Muyllaert)
  20150616.967  <141  (Eddy Muyllaert)
  20150616.978   138  (Patrick Schmeer)
  20150616.978   138  (Patrick Schmeer)
  20150617.010   155  (Gary Poyner)
  20150617.051   146  (Gary Poyner)
  20150617.912   159  (Pavol A. Dubovsky)
  20150617.938  <161  (Pavol A. Dubovsky)
  20150617.967   160  (Pavol A. Dubovsky)
  20150617.972   153  (Pavol A. Dubovsky)
  20150618.953   144  (Jose Ripero)
  20150618.962   143  (Klaus Wenzel)
  20150618.972   134  (Klaus Wenzel)
  20150618.976   138  (Klaus Wenzel)
  20150618.978   145  (Klaus Wenzel)
  20150619.906   126  (Jose Ripero)
  20150619.917   126  (Jose Ripero)
  20150619.931   128  (Jose Ripero)
  20150619.938   127  (Jose Ripero)
  20150619.947   138  (Jose Ripero)
  20150619.955   134  (Jose Ripero)
  20150619.958   135  (Jose Ripero)
  20150619.961   136  (Jose Ripero)
  20150619.969   139  (Jose Ripero)
  20150619.972   141  (Jose Ripero)
  20150619.976   145  (Jose Ripero)
  20150619.979   146  (Jose Ripero)
  20150619.982  <141  (Jose Ripero)
  20150619.990   145  (Jose Ripero)
  20150619.993   146  (Jose Ripero)
  20150619.996   145  (Jose Ripero)
  20150620.003   143  (Jose Ripero)
  20150620.006   143  (Jose Ripero)
  20150620.014   143  (Jose Ripero)