[vsnet-alert 1129] brightening of V2051 Oph

[Taichi Kato <tkato>]

   Rod Stubbings in [vsnet-obs 6643]
(http://vsnet.kusastro.kyoto-u.ac.jp/vsnet/Mail/vsnet-obs/msg06643.html)
reports a brightening of the eclipsing unique cataclysmic variable
V2051 Oph.  His observations (for details and comments see vsnet-obs 6643):

  YYMMDD(UT)   mag  observer
  970804.401  <142  (R. Stubbings)
  970805.403  <138  (R. Stubbings)
  970807.569   139  (R. Stubbings)
  970807.585   141  (R. Stubbings)
  970807.592   138  (R. Stubbings)
  970807.598   138  (R. Stubbings)
  970807.618   138  (R. Stubbings)
  970807.629   137  (R. Stubbings)
  970807.647   143  (R. Stubbings)
  970807.649   141  (R. Stubbings)
  970807.651   138  (R. Stubbings)
  970807.655   138  (R. Stubbings)
  970807.657   137  (R. Stubbings)
  970807.661   137  (R. Stubbings)
  970807.664   136  (R. Stubbings)
  970807.665   136  (R. Stubbings)
  970807.666   136  (R. Stubbings)
  970807.667   136  (R. Stubbings)
  970807.669   136  (R. Stubbings)
  970807.670   136  (R. Stubbings)
  970807.672   136  (R. Stubbings)
  970807.673   137  (R. Stubbings)
  970807.674   137  (R. Stubbings)
  970807.674   136  (R. Stubbings)
  970807.676   136  (R. Stubbings)
  970807.677   136  (R. Stubbings)
  970807.678   136  (R. Stubbings)
  970807.680   136  (R. Stubbings)
  970807.681   136  (R. Stubbings)
  970807.683   136  (R. Stubbings)
  970807.684   136  (R. Stubbings)
  970807.685   136  (R. Stubbings)
  970807.687   136  (R. Stubbings)
  970807.688   136  (R. Stubbings)
  970807.690   136  (R. Stubbings)
  970807.691   137  (R. Stubbings)
  970807.692   138  (R. Stubbings)
  970807.694   138  (R. Stubbings)
  970807.695   137  (R. Stubbings)
  970807.696   138  (R. Stubbings)
  970807.697   137  (R. Stubbings)
  970807.699   137  (R. Stubbings)

   This system is an eclipsing cataclysmic variable below the period gap.
The ephemeris of the eclipse is

   Min.HJD = 2444787.321141 + 0.062427860 E

   Though most of below-the-gap systems are known as SU UMa-type dwarf
novae, it is not still known whether V2051 Oph experience large outbursts.
(Please continue the discussion on this object in vsnet-chat if necessary).

   Stubbings' observations around 7.647 UT apparently detected this
eclipse.  Further observations are encouraged!  For those who don't have
the sequence, the following VSNET chart would help.

   http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/charts/V2051_Oph.ps
   http://ftp.kusastro.kyoto-u.ac.jp/pub/vsnet/charts/dot.cht/V2051_Oph.cht

Regards,
Taichi Kato

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