BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.8 1994, July 05 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 =================================================================== DM Lyr [UG, 13.6p - 18p] ======================== Tonny Vanmunster, Landen, Belgium reports an outburst of this dwarf nova, which is on the Recurrent Objects Programme (The Astronomer Group). The observation has been confirmed by Gary Poyner, Birming- ham, UK and Bill Worraker, Didcot, UK. 1994 Jul 01.928 UT, [14.8 (T. Vanmunster, 0.35-m refl, seq AAVSO); Jul 04.990 UT, 15.0: (T. Vanmunster, heavy clouds); Jul 04.998 UT, 14.6 (B. Worraker, 0.26-m refl, seq TA); Jul 05.014 UT, 14.7 (T. Vanmunster, good conditions); Jul 05.015 UT, 14.3 (G. Poyner, 0.40-m refl, seq AAVSO); Jul 05.023 UT, 14.6 (B. Worraker); DM Lyr was last seen in outburst on 1994 May 1, at magnitude 14.8, by P. Van Cauteren & T. Vanmunster (CVC No.1). V542 Cyg [UGSS:, 13.0p - 18.3:p] ================================ The outburst of this cataclysmic variable, as announced in CVC No.7, has been confirmed by Gary Poyner, Birmingham, UK and Bill Worraker, Didcot, UK. The photometric summary below lists received observations of V542 Cyg. ------------------------------------------------------------------------ DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ------------------------------------------------------------------------ 1994 06 22.933 [13.5 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 24.913 13.6 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 27.944 12.8 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 27.953 13.2 mv TA Poyner, G. 40-cm refl. Mail(poy) 1994 06 27.978 13.0 mv TA Worraker, B. 26-cm refl. Mail(wor) 1994 06 29.940 13.2 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 30.907 13.4 mv AA Vanmunster, T. 35-cm refl. VVS 1994 07 01.925 13.4 mv AA Vanmunster, T. 35-cm refl. VVS 1994 07 05.052 13.7 mv AA Vanmunster, T. 35-cm refl. VVS IR Lyr [UG:, 14.6p - 16.0p] =========================== This remarkable variable is brightening. Please keep on monitoring IR Lyr, since we have not yet sufficient photometric observations to draw any conclusions. Some recent observations : ------------------------------------------------------------------------ DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ------------------------------------------------------------------------ 1994 06 12.000 [14.7 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 14.024 14.6: mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 14.983 14.7 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 19.033 [14.5 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 27.981 [14.5 mv AA Vanmunster, T. 35-cm refl. VVS 1994 06 29.996 14.4: mv AA Vanmunster, T. 35-cm refl. VVS 1994 07 05.059 14.2 mv AA Vanmunster, T. 35-cm refl. VVS V344 Lyr [UG, 14.5p - <20p] =========================== V344 Lyr once more is undergoing an outburst, as indicated by the observations below. This dwarf nova is part of the Recurrent Objects Programme (The Astronomer Group), but due to its frequent outbursts, we have decided NOT to issue any CVC's anymore w.r.t. this variable. We will however keep on monitoring it and reporting observations in CVC's following an outburst. 1994 Jul 01.932 UT, [14.8 (T. Vanmunster, 0.35-m refl, seq TA); Jul 05.006 UT, 14.5 (B. Worraker, 0.26-m refl, seq TA); Jul 05.011 UT, 14.6 (T. Vanmunster); V344 Lyr was last seen in outburst by Bill Worraker, Didcot, UK on 1994 June 8 at mag. 14.7 (CVC No.6). Tonny Vanmunster