IAU COMMISSION 27 UNPUBLISHED DATA FILE 146 3 pages, including cover sheet April, 1985 Observations of AC Boo in 1984 Photoelectric observations of the eclipsing binary AC Boo were made from the Climenhaga Observatory of the University of Victoria on 1984 April 25/26, and 26/27. A 50 cm reflector and photometric system closely matching the UBV filters of the Johnson system were used. The observations of the variable star were bracketed by observations of the comparison star SAO 45287, whose constant brightness was checked twice nightly with observations of SAO 45274. Mean extinction and transformation coefficients were used to correct the differential magnitudes to the Johnson system. R. Robb Dept. of Physics University of Victoria P. O. Box 1700 Victoria, B.C., Canada V8W 2Y2 **************************************************************************** ***************************************************************************** ************ Data MIGHT CONTAIN ERRORS! *************** ************ (digitized from the original manuscript) *************** ***************************************************************************** PAGE 2 AC BOO HELIO JD DEL V DEL B DEL U 2445816.7667 0.656 0.807 0.784 2445816.7743 0.639 0.806 0.909 2445816.7904 0.725 0.883 0.933 2445816.7984 0.804 0.935 1.020 2445816.8062 0.871 1.025 1.121 2445816.8100 0.899 1.073 1.101 2445816.8231 1.108 1.293 1.331 2445816.8269 1.158 1.316 1.400 2445816.8352 1.143 1.328 1.374 2445816.8408 1.131 1.301 1.416 2445816.8447 1.159 1.340 1.341 2445816.8544 1.004 1.239 1.256 2445816.8583 0.962 1.185 1.239 2445816.8666 0.878 1.046 1.128 2445816.8704 0.829 0.981 1.103 2445816.8786 0.708 0.920 0.973 2445816.8958 0.650 0.836 0.864 2445816.8998 0.635 0.808 0.858 2445816.9036 0.656 0.790 0.831 2445816.9148 0.599 0.755 0.808 2445816.9200 0.579 0.746 0.828 2445816.9351 0.605 0.787 0.854 2445816.9388 0.614 0.787 0.818 2445816.9490 0.632 0.815 0.845 2445816.9527 0.640 0.815 0.904 2445816.9602 0.696 0.853 0.950 2445816.9767 0.773 0.985 1.085 2445816.9803 0.802 1.064 1.043 2445816.9843 0.872 1.113 1.140 2445816.9921 0.973 1.210 1.284 2445817.7160 1.149 1.360 1.398 2445817.7238 1.150 1.324 1.396 2445817.7317 1.147 1.366 1.402 2445817.7356 1.065 1.288 1.337 2445817.7428 0.947 1.177 1.214 2445817.7464 0.905 1.148 1.141 2445817.7541 0.835 1.029 1.035 2445817.7577 0.755 0.996 1.031 2445817.7650 0.735 0.918 0.971 PAGE 3 AC BOO HELIO JD DEL V DEL B DEL U 2445817.7721 0.701 0.888 0.965 2445817.7812 0.667 0.865 0.934 2445817.7850 0.654 0.826 0.893 2445817.7886 0.643 0.825 0.900 2445817.7961 0.626 0.830 0.863 2445817.7997 0.613 0.823 0.801 2445817.8032 0.592 0.799 0.837 2445817.8069 0.596 0.811 0.806 2445817.8105 0.616 0.774 0.837 2445817.8178 0.611 0.776 0.819 2445817.8213 0.626 0.800 0.813 2445817.8248 0.607 0.782 0.840 2445817.8440 0.710 0.876 0.931 2445817.8475 0.712 0.873 0.931 2445817.8510 0.750 0.919 0.972 2445817.8584 0.790 0.990 1.038 2445817.8619 0.853 1.003 1.099 2445817.8654 0.896 1.037 1.123 2445817.8727 0.997 1.138 1.212 2445817.8762 1.032 1.192 1.265 2445817.8797 1.080 1.254 1.370 2445817.8871 1.101 1.362 1.416 2445817.8907 1.119 1.363 1.432 2445817.8943 1.095 1.328 1.481 2445817.9023 1.093 1.346 1.432 2445817.9096 1.057 1.280 1.307 2445817.9133 1.021 1.225 1.235 2445817.9168 0.955 1.145 1.130 2445817.9240 0.837 1.020 1.061 2445817.9323 0.762 0.969 1.004 2445817.9398 0.736 0.914 0.955 2445817.9433 0.677 0.882 0.907 2445817.9468 0.670 0.850 0.896 2445817.9635 0.628 0.788 0.851 2445817.9670 0.631 0.815 0.837 2445817.9705 0.630 0.772 0.818 2445817.9774 0.637 0.746 0.797 2445817.9809 0.613 0.759 0.837 2445817.9846 0.638 0.751 0.812