[vsnet-alert 9300] BZ UMa long? outburst; anomalous outburst or superoutburst?

[Taichi Kato]

   As pointed out by several observers, the current outburst of
BZ UMa is longer than past well-observed outbursts.
This may turn out to be a long-awaited superoutburst, while the
major part of the outburst duration seems to be from the slowly
rising branch.  Such slowly rising outbursts (possibly inside-out
outburst?) are rare in short-period systems like BZ UMa.
A few past (normal) outbursts (e.g. 1999 March, mag 10.4) were
as bright as the current one.

  YYYYMMDD(UT)   mag  observer
  20070409.849  <143  (Patrick Schmeer)
  20070409.849  <143  (Patrick Schmeer)
  20070409.855  <140  (Eddy Muyllaert)
  20070410.012   162  (Gary Poyner)
  20070410.831   138  (Wolfgang Kriebel)
  20070410.832   138  (Wolfgang Kriebel)
  20070410.848   139  (Patrick Schmeer)
  20070410.848   139  (Patrick Schmeer)
  20070410.859   137  (Eddy Muyllaert)
  20070410.867   135  (Gary Poyner)
  20070410.875   135  (Wolfgang Kriebel)
  20070410.880  135:V (Roger Pickard)
  20070410.885   134  (Wolfgang Kriebel)
  20070410.887   135  (Patrick Schmeer)
  20070410.887   135  (Patrick Schmeer)
  20070410.902   134  (Eddy Muyllaert)
  20070410.913   133  (Wolfgang Kriebel)
  20070410.944   132  (Wolfgang Kriebel)
  20070410.948   132  (Gary Poyner)
  20070410.994   133  (Pavol A. Dubovsky)
  20070411.014   131  (Wolfgang Kriebel)
  20070411.092   132  (Gary Poyner)
  20070411.208  128V  (Frank Reichenbacher)
  20070411.603  12.56C  (Kazuhiro Nakajima)
  20070411.635   123  (Yutaka Maeda)
  20070411.819   120  (Wolfgang Kriebel)
  20070411.841   127  (Hans-Goran Lindberg)
  20070411.853   119  (Eddy Muyllaert)
  20070411.860   122  (Pavol A. Dubovsky)
  20070411.876   118  (Eddy Muyllaert)
  20070411.913   120  (Gobet Franck)
  20070412.500  11.14C  (Kazuhiro Nakajima)
  20070412.810  11.82CV  (Hans-Goran Lindberg)
  20070412.831  11.79CV  (Hans-Goran Lindberg)
  20070412.854   108  (Eddy Muyllaert)
  20070412.872   107  (Wolfgang Kriebel)
  20070412.875   107  (Erwin van Ballegoij)
  20070412.891  112C  (Ian Miller)
  20070412.919  126V  (Roger Pickard)
  20070413.615   114  (Yutaka Maeda)