BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.12 1994, August 22 Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM Internet: tvm@lms.be TEL. 32-11-831504 P. Van Cauteren, de Borrekenslaan 54, 2630 Aartselaar, BELGIUM 73064.1123@compuserve.COM TEL. 32-3-8774098 =================================================================== UZ Boo [UGWZ, 11.5v - 20.4V] ============================ The table below lists all available photometric observations of this interesting UGWZ star, obtained between Aug. 16 and 21. Some observers have noticed short term fluctuations (< 0.5 mag) in the brightness of UZ Boo. Experienced observers are encouraged to make magnitude estimates every 15 minutes, in order to find out if these light variations are real and repetitive. ------------------------------------------------------------------------ DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ------------------------------------------------------------------------ 1994 08 16.458 [15.1 CU GSC Iida, M. 16-cm refl. Mail(kat) 1994 08 16.84 [14.3 mv AA Szentasko, L. 33-cm refl. Mail(sze) 1994 08 16.87 [12.5 mv AA Schmeer, P. 20-cm SCT Mail(sch) 1994 08 17.167 13.9 mv AA York, D. 45-cm refl. priv(yor) 1994 08 17.224 13.9 mv AA York, D. 45-cm refl. priv(yor) 1994 08 17.490 12.9 mv AA Takenaka, Y. 20-cm SCT Mail(kat) 1994 08 17.510 12.9 mv AA Yamada, M. 36-cm refl. Mail(kat) 1994 08 17.849 12.0 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 17.874 12.5 mv AA Poyner, G. 22-cm refl. priv(poy) 1994 08 17.885 11.8 mv TA Worraker, B. 26-cm refl. Mail(wor) 1994 08 17.885 12.1 mv AA Poyner, G. 40-cm refl. priv(poy) 1994 08 17.903 11.8 mv AA Vanmunster, T. 35-cm refl. VVS 1994 08 18.108 11.7 mv Adams, M. AAVSO AN 191 1994 08 18.188 11.6 mv Royer, R. AAVSO AN 191 1994 08 18.431 12.0 CU GSC Iida, M. 16-cm refl. Mail(kat) 1994 08 18.477 11.7 CV GSC Kato, T. 60-cm refl. Mail(kat) 1994 08 18.819 12.1 mv AA Szentasko, L. 33-cm refl. Mail(sze) 1994 08 18.839 12.0 mv AA Schmeer, P. 20-cm SCT Mail(sch) 1994 08 18.840 11.9 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.843 12.0 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.850 11.9 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.852 11.9 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.858 11.6 mv AA Broens, E. 35-cm refl. VVS 1994 08 18.859 11.7 mv AA Diepvens, A. 15-cm refr. VVS 1994 08 18.864 11.8 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.869 12.0 mv AA Schmeer, P. 20-cm SCT Mail(sch) 1994 08 18.871 11.9 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.881 11.6 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.884 11.6 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.891 11.6 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.899 11.6 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.936 11.9 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 18.940 11.8 mv AA Pietz, J. 20-cm SCT Mail(pie) 1994 08 19.868 11.8 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.876 11.8 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.878 11.9 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.885 11.8 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.890 12.1 mv AA Vanmunster, T. 35-cm refl. VVS 1994 08 19.892 11.8 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.898 11.7 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.899 12.1 mv AA Vanmunster, T. 35-cm refl. VVS 1994 08 19.901 11.7 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.903 11.7 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.907 11.7 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 19.910 11.7 mv AA Poyner, G. 22-cm refl. Mail(poy) 1994 08 20.483 11.7 mv GSC Moriyama, M. 33-cm SCT Mail(kat) CU = CCD image, unfiltered CV = CCD image, V-filter V493 Lyr = S10930 Lyr [UG] ========================== Gary Poyner, Birmingham, UK has been able to confirm the outburst announcement [CVC No.11] of V493 Lyr. The photometric summary below illustrates the present outburst is a faint one compared to the October 1993 outburst. ------------------------------------------------------------------------ DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ------------------------------------------------------------------------ 1994 08 14.938 [15.1 mv TA Poyner, G. 40-cm refl. Mail(poy) 1994 08 15.507 [16.1 CU Iida, M. 16-cm refl. Mail(kat) 1994 08 15.886 [14.1 mv TA Vanmunster, T. 35-cm refl. VVS 1994 08 16.997 14.9 mv TA Vanmunster, T. 35-cm refl. VVS 1994 08 17.049 14.8 mv TA Vanmunster, T. 35-cm refl. VVS 1994 08 17.887 14.8 mv TA Poyner, G. 40-cm refl. priv(poy) 1994 08 17.906 14.8: mv TA Vanmunster, T. 35-cm refl. VVS 1994 08 17.935 14.7 mv TA Poyner, G. 40-cm refl. priv(poy) 1994 08 18.006 14.6 mv TA Poyner, G. 40-cm refl. priv(poy) 1994 08 18.094 14.6 mv TA Worraker, B. 26-cm refl. Mail(wor) 1994 08 18.84 14.1 mv Szentasko, L. 33-cm refl. Mail(sze) 1994 08 19.893 14.4 mv TA Poyner, G. 40-cm refl. Mail(poy) Tonny Vanmunster