BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.5 1994, June 06 Ed.: P. Van Cauteren, de Borrekenslaan 54, 2630 Aartselaar, BELGIUM 73064.1123@compuserve.COM TEL. 32-3-8774098 T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM Internet: tvm@lms.be TEL. 32-11-831504 =================================================================== DI UMa [UG, 15p - 17.7p] ======================== This dwarf nova type cataclysmic variable, which is on the Re- current Objects Programme of The Astronomer Group, once more is in outburst, as indicated by the observations below : 1994 Jun 4.927 UT, [14.1 (G. Poyner, 0.40-m refl., seq: TA); Jun 5.951 UT, 14.6 (T. Vanmunster, 0.35-m refl., seq: AAVSO); The star was last seen in outburst on 1994, May 10 (CVC No.3). UV Per [UGSU, 11.0v - 17.5v] ============================ Refering to the outburst announcement in CVC No.4, we herewith include photometric observations covering the current super- outburst of UV Per. New entries since our Photometry Update No.1 are labeled with an '*'. --------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE --------------------------------------------------------------------- 1994 05 17.956 [13.6 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 22.084 [13.0 mv AA Schmeer, P. 20-cm SCT Mail(sch) 1994 05 29.913 11.9 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 29.993 11.9 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 30.917 12.1 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 30.971 12.6 mv BAA Worraker, B. 26-cm refl. Mail(wor) 1994 05 30.987 12.3 mv AA Pietz, J. 20-cm SCT varstars 1994 05 31.001 12.3 mv BAA Poyner, G. 20-cm refl. Mail(poy) 1994 05 31.001 11.5 mv AA Poyner, G. 20-cm refl. Mail(poy) 1994 05 31.008 12.4 mv BAA Worraker, B. 26-cm refl. Mail(wor) 1994 05 31.015 11.9 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 31.047 11.8 mv AA Schmeer, P. 20-cm SCT Mail(sch) 1994 05 31.897 12.0 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 31.969 12.2 mv AA Jensen, L. 33-cm refl. Mail(jen) 1994 05 31.986 11.9 mv AA Vanmunster, T. 35-cm refl. VVS 1994 05 31.993 12.5 mv BAA *Poyner, G. 20-cm refl. Mail(poy) 1994 05 31.999 11.6 mv AA *Diepvens, A. 15-cm refr. VVS 1994 06 01.040 11.6 mv AA *Schmeer, P. 20-cm SCT Mail(sch) 1994 06 01.943 12.1 mv AA *Jensen, L. 33-cm refl. Mail(jen) 1994 06 03.008 12.2 mv AA *Vanmunster, T. 35-cm refl. VVS 1994 06 04.994 13.0 mv BAA *Poyner, G. 20-cm refl. Mail(poy) 1994 06 05.940 12.5 mv AA *Vanmunster, T. 35-cm refl. VVS IR Lyr [UG:, 14.6p - 16.0p] =========================== This peculiar variable finally is showing some interesting activity, as it has started to fade. It is critical to continue monitoring IR Lyr, on its way to a minimum. Please keep submitting your observations for a complete photometric overview of this variable. New entries since our CVC No.4 summary are indicated with an '*'. --------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE --------------------------------------------------------------------- 1994 04 19.132 [14.7 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 04 28.941 14.3: mv GSC Vanmunster, T. 35-cm refl. VVS 1994 04 28.974 14.0 mv GSC Van Cauteren, P. 40-cm refl. VVS 1994 04 30.920 14.0 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 04 30.995 13.8 mv GSC Poyner, G. 40-cm refl. Mail(poy) 1994 05 01.953 13.7 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 02.937 13.8 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 10.956 13.9 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 11.924 13.8 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 13.928 [14.1 mv GSC Jensen, L. 33-cm refl. Mail(las) 1994 05 14.019 14.1 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 15.913 13.8 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 17.997 14.3 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 20.051 [13.9 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 28.971 [13.9 mv GSC *Jensen, L. 33-cm refl. Mail(las) 1994 05 29.931 14.1 mv GSC Vanmunster, T. 35-cm refl. VVS 1994 05 31.016 14.4 mv GSC *Poyner, G. 40-cm refl. varstars 1994 06 04.995 14.6 mv GSC *Poyner, G. 20-cm refl. Mail(poy) 1994 06 05.990 14.7: mv GSC *Vanmunster, T. 35-cm refl. VVS V1504 Cyg [UGSU, 13.5p - 17.7p] =============================== This SU UMa-type dwarf nova, which is part of an observation programme from the VSOLJ (Japan), recently was in outburst, as indicated by the observations below. 1994 May 30.956 UT, [13.9 (T. Vanmunster, 0.35-m refl., Seq: GSC); May 31.962 UT, 14.2 (T. Vanmunster); Jun 01.636 UT, 15.2 (C. Kunjaya, Ouda Station, Kyoto University, Japan, V-band CCD image, Seq: GSC); Jun 03.038 UT, [14.5 (T. Vanmunster); Jun 05.985 UT, [14.5 (T. Vanmunster); The faintness of the maximum and the rapid decline suggest that the present outburst was a normal one. V1504 Cyg was last seen in outburst in October 1991 (mag 14.4, Moriyama), according to our records. Tonny Vanmunster