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[vsnet-alert 894] fading of CR Boo

   The AM CVn-type helium cataclysmic variable CR Boo is reported to enter
a faint phase, after its prolonged bright state from the beginning of this
season.  Observations:

  YYMMDD(UT)   mag  code
  970423.969   145  POY
  970429.941   147  POY
  970430.858  <155  JEN
  970430.967   148  POY
  970501.415   155: HSG
  970501.675  <143  Wnt
  970501.904  <155  JEN
  970502.005   152  POY
  970502.376   155: HSG
  970502.974   147  POY
  970503.267   143  HSG
  970505.187   154: HSG
  970506.183   155: HSG
  970506.928   155  POY
  970507.877   168  JEN
  970508.242   151  HSG
  970509.060   155  POY
  970510.206   142  HSG
  970511.035   153  POY

   A significant difference between observers of different longitudes seems
to suggest the short-term variation less than 1 day continues to exist.
Observations of dense coverage are highly encouraged during the present
state of large-amplitude high/low transitions in order to verify the
suggested relation of this system to SU UMa stars.

Regards,
Taichi Kato

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