BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.65 1995, October 21 Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM Internet: tvanmuns@innet.be TEL. 32-11-831504 =================================================================== V630 Cyg [UGSU:, 13.4p - 17.2p] =============================== This UG-type cataclysmic variable, which recently has been added to the CVAP, is undergoing an outburst, as indicated by the observations of Tonny Vanmunster, Landen, Belgium and Eric Broens, Mol, Belgium : 1995 Oct 19.945 UT, [15.2 (E. Broens, 0.35-m refl., seq: AAVSO); Oct 20.627 UT, [13.4 (M. Moriyama, 0.33-m refl.); Oct 20.888 UT, [14.1 (G. Poyner, 0.40-m refl.); Oct 20.945 UT, [15.2 (E. Broens); Oct 21.763 UT, 14.2 (T. Vanmunster, 0.35-m refl., seq: AAVSO); Oct 21.774 UT, 14.3 (E. Broens); Since the classification of V630 Cyg as an SU UMa-type dwarf nova is still unsure, it is of great importance to monitor the present outburst closely. If it turns out to be a superoutburst, this could be an ideal opportunity to confirm the suspected classification. According to our data in the "Outburst Activity Database", V630 Cyg was last observed in outburst on August 5, 1995 by Dave York (NM) and reached a maximum magnitude of 15.1 (AAVSO Circ. 299). V1060 Cyg [UGSS, 13.5p - 18p] ============================= This CVAP object is undergoing a very bright outburst, as reported by M. Moriyama, Sasebo, Nagasaki, Japan. His observations are presented below, together with some confirmative ones. 1995 Oct 20.604 UT, 13.2 (M. Moriyama, 0.33-m refl.); Oct 20.648 UT, 13.2 (M. Moriyama); Oct 20.882 UT, [14.7 (G. Poyner, 0.40-m refl.); Oct 21.585 UT, 13.2 (M. Moriyama); Oct 21.797 UT, 13.1 (E. Broens, 0.35-m refl., seq: Kato); Oct 21.822 UT, 13.0 (T. Vanmunster, 0.35-m refl., seq: KATO); The previous outburst of V1060 Cyg was reported by Tonny Vanmunster on August 21, 1995 (CVC 53), when the object reached a maximum brightness of mag. 14.9 (CVC 55). V542 Cyg [UGSS:, 13.0p - 18.3:p] ================================ A first photometric summary, covering observations of the present out- burst of V542 Cyg (see also CVC 64) is given below : ----------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ----------------------------------------------------------------------- 1995 10 14.03 [15.1 mv AA Bortle, J. CVC 64 1995 10 17.035 15.1 mv AA Bortle, J. CVC 64 1995 10 17.081 15.1 mv AA Bortle, J. CVC 64 1995 10 18.013 15.0 mv AA Bortle, J. CVC 64 1995 10 19.113 14.6 mv AA Bortle, J. CVC 64 1995 10 19.781 14.1 mv AA Szentasko, L. 33-cm refl. CVC 64 1995 10 19.957 13.7 mv AA Broens, E. 35-cm refl. CVC 64 1995 10 20.019 13.8 mv AA Vanmunster, T. 35-cm refl. CVC 64 1995 10 20.581 14.2 mv Moriyama, M. 33-cm refl. VSNET 1995 10 21.452 14.1 CU Iida, M. 20-cm+ST-6 VSNET 1995 10 21.588 14.0 mv Moriyama, M. 33-cm refl. VSNET 1995 10 21.767 13.4 mv AA Vanmunster, T. 35-cm refl. VSNET TW Tri [UGZ, 13.3p - 17.0p] =========================== The outburst of TW Tri, reported in CVC 63, already seems to be over, as indicated by the following table with photometric observations : ----------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ----------------------------------------------------------------------- 1995 10 16.948 13.6 mv GSC Vanmunster, T. 35-cm refl. CVC 63 1995 10 17.339 13.8 mv Scovil, C. CVC 63 1995 10 17.528 15.2 CU GSC Iida, M. 20-cm + ST-6 CVC 63 1995 10 18.202 13.7 mv Scovil, C. CVC 63 1995 10 18.857 14.0 mv GSC Broens, E. 35-cm refl. VSNET 1995 10 19.911 14.4 mv GSC Broens, E. 35-cm refl. VSNET 1995 10 20.677 14.2 mv Moriyama, M. 33-cm refl. VSNET 1995 10 21.488 [16.0 CU GSC Iida, M. 20-cm + ST-6 VSNET 1995 10 21.854 [14.8 mv GSC Vanmunster, T. 35-cm refl. VSNET Tonny Vanmunster