COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 2723


                                           Konkoly Observatory
                                           Budapest
                                           20 May 1985

                                           HU ISSN 0374 - 0676

       PHOTOELECTRIC OBSERVATIONS OF gamma Cas, X Per AND BU Tau

  The three variable stars have been observed in the U, B, V - bands with a
165/1430 Newtonian telescope and a 1P21 PMT.


gamma Cas
comparison star : Alpha Cas (HD 3712), (V=2.23, B-V=+1.17)
check star : Eta Cas (HD 4614), (V=3.44, B-V=+0.57)


Hel. J. D.          Hel. J. D.
2440000+     V      2440000+   V
5962.346     2.23   6018.275   2.21
5975.358     2.21   6034.250   2.20
5990.271     2.20   6054.263   2.20
5991.275     2.19   6102.267   2.19
6002.250     2.18   6115.279   2.20
6005.300     2.18   6116.250   2.20
6006.263     2.18   6128.275   2.20
6017.271     2.15


X Per

comparison star : HD 24167 (V=6.25, B-V=+0.20, U-B=+0.14)

Hel. J. D.   V       B-V   U-B
2440000+
5621.321     6.37    +0.25
5638.279     6.31
5645.250     6.38    +0.27
5647.254     6.37    +0.27
5648.279     6.51:
5651.279     6.43:   +0.20
5663.229     6.32    +0.28
5673.308     6.40    +0.23
5683.258     6.42
5691.250     6.48    +0.16
5703.281     6.47
5705.271     6.51
5757.275     6.36:
5759.283     6.40    +0.21
5778.304     6.43    +0.20
5780.292     6.35    +0.31
5975.333     6.33    +0.27 -0.71




Hel. J. D.   V       B-V        U-B
2440000+
5994.304     6.43    +0.32:
6005.292     6.43    +0.29
6018.271     6.57    +0.31    -0.87
6034.263     6.58    +0.20    -0.80
6037.208     6.52    +0.14
6054.292     6.53    +0.18    -0.71
6082.271     6.62
6090.300     6.60    +0.19    -0.78
6094.217     6.60
6095.263     6.62
6100.279     6.65    +0.10
6108.271     6.59    +0.19
6109.279     6.61    +0.12
6116.275     6.59    +0.12
6128.271     6.57
6138.296     6.78:
6148.321     6.58    +0.15    -0.76
6149.350     6.57    +0.20    -0.81


BU Tau
comparison star : 16 Tau (HD 23280), (V=5.46, B-V=-4.04, U-B=-0.31)
check star : 19 Tau (HD 23338), (V=5.65, B-V=-0.07, U-B=-0.36)

   Hel. J. D.   V     B-V   U-B
    2440000+
    5975.238  5.26
    6005.271  5.17
    6018.292  5.13
    6034.238  5.19   -0.13 -0.17
    6037.250  5.18   -0.13
    6054.363  5.20   -0.14 -0.21
    6082.250  5.12
    6010.271  5.09   -0.04:
    6095.258  5.10   -0.02
    6109.279  5.13
    6116.263  5.09   -0.01
    6128.271  5.17   -0.11
    6138.300  5.13
    6148.321  5.11




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