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[vsnet-chat 6202] Surprisingly parallel discrepancies between observations



Surprisingly parallel discrepancies between observations

   I discovered that there are surprisingly parallel discrepancies between
observations of V Gem.

  YYYYMMDD(UT)   mag  observer
  20030220.831   121  (Alfons Diepvens)
  20030220.940   120  (Erwin van Ballegoij)
  20030222.800   127  (Balogh Istvan)
  20030222.819   123  (Georg Comello)
  20030222.847   113  (Thorsten Lange)       -- B
  20030224.851   110  (Thorsten Lange)       -- B
  20030226.778    86  (Adrian Sonka Bruno)   -- A
  20030226.867   112  (Thorsten Lange)       -- B
  20030227.067   125  (Mike Simonsen)
  20030301.800   127  (Georg Comello)
  20030306.819   129  (Georg Comello)
  20030306.960   132  (Erwin van Ballegoij)
  20030309.775    90  (Adrian Sonka Bruno)   -- A
  20030313.835  <116  (Thorsten Lange)       -- B
  20030313.940   130  (Erwin van Ballegoij)
  20030315.790   134  (Georg Comello)
  20030321.826  <122  (Thorsten Lange)       -- B
  20030321.847  <142  (Alfons Diepvens)
  20030323.812   135  (Guenther Krisch)
  20030323.817   124  (Thorsten Lange)       -- B
  20030323.910   133  (Erwin van Ballegoij)
  20030324.783    96  (Adrian Sonka Bruno)   -- A
  20030330.815  <122  (Thorsten Lange)
  20030404.765    99  (Adrian Sonka Bruno)   -- A

   There are three groups of observations.  (1) observations with no
marks, (2) group A, and (3) group B.  Surprisingly enough, all observations
have a common fading rate in spite of discrepancies up to several
magnitudes!!  Even if the group B observations can be interpreted as
a result of different sequence or observer's response, the group A
observations are a mystery.  There are confusing stars in the field of
V Gem, but it would be difficult to think any variation of a much fainter
Mira star could have affected a much brighter field star.

Regards,
Taichi Kato


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