COMMISSION 27 OF THE I.A.U.
                 INFORMATION BULLETIN ON VARIABLE STARS
                             Number 3222

                                                         Konkoly Observatory
                                                         Budapest
                                                         28 July 1988

                                                         HU ISSN 0374 - 0676


      PHOTOELECTRIC OBSERVATIONS OF gamma Cas, X Per AND BU Tau

The three variable stars have been observed in the UBV bands with a
250/3250 Cassegrain telescope and a 1P21 PMT. These observations are the
continuation of those published in IBVS No. 2893.


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+

6714.279   2.22      7071.317   2.10
6716.304   2.20      7079.313   2.16
6728.317   2.21      7083.263   2.23
6762.217   2.16      7095.242   2.27
6766.225   2.22      7096.229   2.25
6770.388   2.23      7107.225   2.21
7070.308   2.23      7170.250   2.19


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+

6705.363   6.62      +0.08      -0.72
6709.365   6.60      +0.10      -0.72
6714.338   6.56      +0.09      -0.69
6716.321   6.58
6728.305   6.57      +0.11      -0.72
6731.308   6.59      +0.11
6766.238   6.45      +0.08      -0.58
6768.179   6.52      +0.01      -0.52
6770.182   6.52       0.00      -0.32:
7083.288   6.42      -0.02
7095.279   6.36      +0.15      -0.83
7096.271   6.36      +0.19      -0.79
7115.238   6.29      +0.21      -0.68
7129.225   6.31
7140.229   6.32      +0.18      -0.79
7170.275   6.30      +0.03      -0.66
7172.271   6.30      +0.11      -0.69
7174.345   6.25      +0.11      -0.72
7180.292   6.32      +0.01      -0.61
7203.292   6.32      +0.04      -0.65
7230.271   6.30      +0.10      -0.61


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+

6705.396     5.13     -0.03
6709.375     5.14     -0.04
6714.358     5.17     -0.12
6728.300     5.08     -0.08
6737.313     5.15     -0.13
6746.321     5.14
6762.183     5.23     -0.09
6763.267     5.06     -0.01
6766.179     5.14     -0.12
6768.171     5.18     -0.11
6770.233     5.09     -0.07
7083.279     5.09      0.00
7095.250     5.15     +0.03
7096.271     5.12      0.00
7129.238     5.06
7140.200     5.08     -0.02
7170.275     5.11     -0.15
7172.250     5.06     -0.02
7174.313     5.12     -0.13
7180.283     5.06     -0.08
7203.250     5.09     -0.08
7230.292     5.02     -0.06


                      D. BOEHME
                  4851 Nessa No. 11
               German Democratic Republic