COMMISSION 27 OF THE I. A. U.
          INFORMATION BULLETIN ON VARIABLE STARS
                      Number 2893


                                  Konkoly Observatory
                                  Budapest
                                  8 May 1986
 
                                  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 250/3250 Cassegrain telescope and a 1P21 PMT. These observations
are the continuation of those published in IBVS No. 2723,

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.    V         Hel.J.D.   V
2440000+              2440000+

6304.396   2.08       6368.316  2.21
6306.488   2.19       6378.379  2.16
6310.388   2.21       6414.275  2.33
6327.403   2.19       6416.279  2.16
6338.367   2.26       6422.270  2.21
6339.367   2.24       6463.188  2.21
6346.350   2.24       6508.263  2.20
6347.392   2.27       6530.263  2.17
6360.370   2.21       6537.270  2.21
6361.329   2.20       6546.279  2.11

X Per
Comparison star;   HD24167
                   (V=6.25,B-V =+0.20,U-B=+0.14)

Hel. J.D.            V     B-V     U-B
2440000+

6374.238           6.75   +0.17
6382.305           6.83   +0.08   -0.68
6459.256           6.81   +0.09



Hel.J.D.       V      B-V       U-B
2440000+

6466.265      6.74   +0.13    -0.64
6468.276      6.75   +0.26:
6469.275      6.76   +0.07    -0.60
6506.304      6.79
6507.292      6.76   +0.06
6508.266      6.73   +0.11
6515.292      6.79    0.00:
6522.300      6.77



BU Tau

Comparison star: 16 Tau (HD 23280)
  (V=5.46, B-V= -0.04, 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
2440000+

6374.283   5.11   -0.05
6382.298   5.09    0.00
6466.273   5.13   -0.06
6468.282   5.07   -0.09
6515.271   5.12   -0.04






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