[vsnet-alert 9018] SW UMa superoutburst, growth of superhumps

[Taichi Kato]

   SW UMa superoutburst continues.  Time-resolved CCD photometry
by the VSOLJ members suggest that the growth of superhumps
was relatively slow (amplitude yet as small as 0.05 mag on Sep. 18,
growth to 0.1 mag on Sep. 19).  If this observation reflects the
true growth of superhumps, the delay of growth (5-6 d) is
comparable to some of WZ Sge-type stars.  With the existence
of infrequent 9-th mag superoutbursts, SW UMa may occasionally
share some properties common to WZ Sge-type dwarf novae.
Further observations are strongly encouraged.

  YYYYMMDD(UT)   mag  observer
  20060606.926  <135  (Eddy Muyllaert)
  20060607.978  <146  (Gary Poyner)
  20060609.953  <146  (Gary Poyner)
  20060610.936  <135  (Eddy Muyllaert)
  20060912.140  <130  (Patrick Schmeer)
  20060912.140  <130  (Patrick Schmeer)
  20060913.149   108  (Patrick Schmeer)
  20060913.149   108  (Patrick Schmeer)
  20060914.035   102  (Stanislaw Swierczynski)
  20060914.137   104  (Patrick Schmeer)
  20060914.172   104  (Patrick Schmeer)
  20060915.024   101  (Stanislaw Swierczynski)
  20060916.020   102  (Stanislaw Swierczynski)
  20060916.032  108C  (Ian Miller)
  20060916.753  10.95C  (Kazuhiro Nakajima)
  20060918.816   107  (Eddy Muyllaert)
  20060918.887   105  (Dariusz Dorda)
  20060918.942   105  (Pavol A. Dubovsky)
  20060918.965   107  (Laurent Bichon)
  20060919.090   108  (Gary Poyner)
  20060919.097   107  (Jose Ripero)
  20060919.103   107  (Stanislaw Swierczynski)