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[vsnet-history 643] SN1993J (Kato)


Date: Wed, 7 Apr 93 18:01:36 JST
From: tkato@kusastro.kyoto-u.ac.jp (Taichi Kato)
Subject: SN1993J, photometry at Ouda, Apr.6

  CCD observations on Apr. 6 at Ouda Station, Kyoto University (Nara, Japan)
  (60-cm reflector, fl=4.8m)

              SN-starA              starB-StarA
  band*    mid UT   dmag  N         mid UT   dmag  N
  ----  ----------------------------------------------
   V    930406.485  0.391  12    930406.486  0.452  13
   B    930406.538  0.226   6    930406.538  0.397   6
   Ic   930406.511  0.452  12    930406.511  0.456  14
  ----  ----------------------------------------------
   V    930406.685  0.377  18    930406.694  0.490  15
   B    930406.720  0.218   5    930406.720  0.428   5
   Ic   930406.739  0.413   9    930406.739  0.481   9

  band: uncorrected Ouda system
  Using standard values of starB (V=11.90, B=12.40, Ic=11.30), we obtain

  (first half)
  SN:     V=11.84,  B=12.23,  Ic=11.29
  starA:  V=11.45,  B=12.00,  Ic=10.84
  (last half)
  SN:     V=11.79,  B=12.19,  Ic=11.23
  starA:  V=11.41,  B=11.97,  Ic=10.82

  Condition was rather non-photometric, but the data suggest that supernova
  is definitely on the rise.

Regards,
Taichi Kato (Kyoto University)

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