BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.4 1994, May 30 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 =================================================================== UV Per [UGSU, 11.0v - 17.5v] ============================ Tonny Vanmunster, Landen, Belgium reports an outburst of this SU UMa-type dwarf nova, as indicated by the following observations: 1994 May 17.956 UT, <13.6 (T. Vanmunster, 0.35-m reflector); May 29.913 UT, 11.9 (T. Vanmunster, Seq: AAVSO); May 29.993 UT, 11.9 (T. Vanmunster, Seq: AAVSO); According to our records, UV Per was last seen in outburst in April 1993, when it reached mag 12.1 (Vanmunster T., Van Loo F., York D.). DO Dra [UGSS + DQ, 10.0B - 15.1B] ================================= Refering to the recent brightening of DO Dra, as reported in CVC No.3, the following photometric summary lists all available observations (starting from May 6, 1994) : --------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE --------------------------------------------------------------------- 1994 05 06.463 [14.3 mv ?? Takahashi, S. 60-cm refl. varstars 1994 05 06.518 [14.0 mv ?? Koshiro, M. 30-cm refl. varstars 1994 05 08.465 [13.4 mv ?? Koshiro, M. 30-cm refl. varstars 1994 05 08.979 [14.2 mv TA Poyner, G. 40-cm refl. Mail(poy) 1994 05 09.485 [13.4 mv ?? Koshiro, M. 30-cm refl. varstars 1994 05 10.878 [14.2 mv TA Vanmunster, T. 35-cm refl. VVS 1994 05 11.781 [14.3 mv AA Jensen, L. 33-cm refl. Mail(las) 1994 05 11.888 [14.2 mv TA Vanmunster, T. 35-cm refl. VVS 1994 05 13.932 14.1 mv TA Vanmunster, T. 35-cm refl. VVS 1994 05 13.990 14.2 mv TA Vanmunster, T. 35-cm refl. VVS 1994 05 13.993 14.2 mv TA Van Cauteren,P. 40-cm refl. VVS 1994 05 13.996 [12.4 mv ?? Bengtsson, H. 15-cm refl. varstars 1449 05 14.894 [12.4 mv AA Jensen, L. 33-cm refl. Mail(las) 1994 05 14.913 [12.4 mv ?? Bengtsson, H. 15-cm refl. varstars 1994 05 14.979 [12.4 mv ?? Bengtsson, H. 15-cm refl. varstars 1994 05 15.589 [14.0 mv ?? Koshiro, M. 30-cm refl. varstars 1994 05 15.887 14.3 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 15.915 14.2 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 15.954 14.3 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 15.983 14.4 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 16.455 [14.3 mv ?? Takahashi, S. 60-cm refl. varstars 1994 05 16.460 16.2 C ?? Iida, M. 16-cm refl.+ST6 varstars 1994 05 16.469 [14.3 mv ?? Takahashi, S. 60-cm refl. varstars 1994 05 17.965 14.4 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 18.010 15.4 mv KT Vanmunster. T. 35-cm refl. VVS 1994 05 18.014 14.4 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 20.053 [13.5 mv TA Vanmunster. T. 35-cm refl. VVS 1994 05 20.474 [14.3 mv ?? Takahashi, S. 60-cm refl. varstars 1994 05 29.910 [14.2 mv TA Vanmunster. T. 35-cm refl. VVS Remarks : TA = sequence The Astronomer AA = sequence AAVSO KT = sequence Mr. Kato (CCD-frame DD54476) Patrick Schmeer informs us that the most recent bright outburst of DO Dra did not occur in 1988 (as mentioned in CVC No.3), but in September 1990, when he detected the star at magnitude 9.7. IR Lyr [UG:, 14.6p - 16.0p] =========================== Following the outburst announcement of IR Lyr in CVC No.1, we compiled the photometric summary below. It indicates that IR Lyr does not show typical 'UG' characteristics (assuming the identifi- cation of the star, as indicated in "A Catalog and Atlas of Cata- clysmic Variables" [Downes, Shara, 1993], is correct). The current 'outburst' of IR Lyr was also confirmed by Luc Vanhoeck, Breendonk Belgium, who obtained an unfiltered CCD image of the object. Further observations of this interesting variable are encouraged. --------------------------------------------------------------------- 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 29.931 14.1 mv GSC Vanmunster, T. 35-cm refl. VVS Tonny Vanmunster