[vsnet-alert 9829] CH UMa in unusual outburst

[Ohshima]

CH UMa in unusual rising

 The UGSS type dwarf nova CH UMa is undergoing an outburst.
 Since this star stopped rising around 12th mag, this outburst 
seemed to be a faint outburst. However, this star brightened to
 11.7 on 16th of Jan. The previous variation may not be a faint 
maximum, but a stagnation. 
 Though such a stagnation is also observed in the outburst of 
2003 Sep, the length of the stagnation was shorter, around 2-3 days.

Recent Observations;
  20071203.875   149  (Gary Poyner)
  20071208.960   149  (Gary Poyner)
  20071210.896   148  (Gary Poyner)
  20071211.898   148  (Gary Poyner)
  20071216.832   149  (Gary Poyner)
  20071216.903  <143  (Eddy Muyllaert)
  20071218.122  144V  (Eienne Morelle)
  20071222.837  <146  (Gary Poyner)
  20071230.945  <142  (Jose Ripero)
  20080105.953   139  (Gary Poyner)
  20080105.985   140  (Eddy Muyllaert)
  20080106.092   136  (Gary Poyner)
  20080106.719   128  (Wolfgang Kriebel)
  20080107.797   128  (Wolfgang Kriebel)
  20080107.822   130  (Gary Poyner)
  20080107.981   129  (Eddy Muyllaert)
  20080108.757   128  (Wolfgang Kriebel)
  20080112.787   128  (Eddy Muyllaert)
  20080114.078   127  (Pavol A. Dubovsky)
  20080116.897   117  (Eddy Muyllaert)