COMMISSION 27 OF THE I. A. U.
       INFORMATION BULLETIN ON VARIABLE STARS
                    NUMBER 164





                                     Konkoly Observatory
                                     Budapest
                                     29 October 1966


      Veroffentlichungen der Remeis-Sternwarte Bamberg
   Astronomisches Institut der Universitat Erlangen-Nurnberg
                 Band VI, Nr. 37





           BV 449 AND BV 600, TWO BRIGHT EB-STARS


        The derivation of periods of variable stars from sky patrol
  plates often leads to preliminary or even to pseudo-periods because
  of the special nature of the distribution of exposure times in Julian
  date, caused by the observing conditions. Often the number of minima
  is too small for a final statement. However, BV-stars are bright new
  variables and because of the general interest (photoelectric or
  spectroscopic measurements) in such stars the early announcement
  should not be hampered by the possibility that a later correction to the
  first results might come out to be necessary.

        BV 499 = BD -12d4227 (7.0m) = HD 135 681 (A2)

        Min = JD 242 6811.490 + 0.612077d . E

         Minima           E        O - C
       2425758.429     -1720.5    +0.018
          6811.463         0      -0.027
              .492         0      +0.002
          7131.650(3/4)  523      +0.044
          7185.499       611      +0.030
          7212.415       655      +0.015
       2427216.396       661.5    +0.017
       2437376.598     17261      +0.047
          7819.408     17984.5    +0.019


         Minima            E        O - C
       2438202.290      18610      +0.047
          8471.538      19050      -0.019
          8494.492      19087.5    -0.018
          8502.482      19100.5    +0.015
          8525.427      19138      +0.007
          8548.331      19175.5    -0.041
          8556.329      19188.5    -0.001
          8580.245(3/4) 18227.5    +0.045
          8587.251      19239      +0.012
          8880.423      19718      -0.001
          8911.340      19768.5    +0.006
          8934.302      19806      +0.015
          8942.261      19819      +0.017
          8964.219      19855      -0.060
          9235.410      20298      -0.019
          9261.400(3/4) 20340.5    -0.042
          9269.376      20353.5    -0.023
          9289.310      20386      -0.018

    Ampl. 0.40m, the secondary minimum is of similar depth as the primary 
minimum.

          BV 600 = BD -17d 6422 (6.8m) = HD 209 278 (A2)
          Min = JD 243 6814.440 + 0.945. 006d . E

          Minima            E         O - C
        2436814.418          0        -0.022
           6850.330         38        -0.020
           6868.306         57        +0.001
           7174.435(3/4)   381        -0.052
           7203.355(1/2)   410.5      -0.010
           8618.444        1909       -0.012
           8636.400        1928       -0.011
           8672.286        1966       -0.036
           8691.244        1986       +0.022
           8692.250(1/4)   1987       +0.083
           9023.337(1/4)   2337.5     -0.059
           9051.246        2367       -0.023

    Ampl. 0.60m, the secondary minimum is half of the primary minimum.
     

        Remeis-Observatory, Bamberg            W. STROHMEIER