BELGIAN ASTRONOMICAL SOCIETY V.V.S. - Working Group Variable Stars Cataclysmic Variables Circular No.77 1996, January 02 Ed.: T. Vanmunster, Walhostraat 1A, 3401 Landen, BELGIUM Internet: tvanmuns@innet.be TEL. 32-11-831504 -------------------------------------------------------------- The CATACLYSMIC VARIABLES Home Page: hht://www.cv.psi.edu =================================================================== S10932 [UG:+E, 13.4 - 18.5p] ============================ Taichi Kato, Ouda Station, Kyoto University, Japan reports an outburst detection using CCD of the highly unknown eclipsing dwarf nova S10932 (which is part of the Belgian Cataclysmic Variables Alert Programme). S10932 is located at R.A. = 12h39m32.1s, Decl.= +21d08'06" (J2000.0). A finder chart and sequence is available at the Cataclysmic Variables Home Page. One of the few references in professional literature on S10932 is IBVS 4182, in which Wenzel and Schwartz describe the object as a new eclipsing cata- clysmic variable (likely a dwarf nova) below the period gap. Remark that this positions S10932 amongst the few known eclipsing dwarf novae in the northern hemisphere. According to IBVS 4182, the mid-eclipse times are : Min.(hel.) = JD 2449486.4821 + 0.08703 E Available observations : 1995 Dec 29.022 UT, [14.1 (T. Vanmunster, 0.35-m refl., seq: GSC); 1996 Jan 01.83 UT, 13.5V (Ouda Team, 0.60-m refl. + CCD + V-filter); In a follow-up message on VSNET, dated 1996, January 2nd, Kato reports a first eclipse timing : "Preliminary analysis of CCD observations at Ouda Station confirms the outburst of S10932 accompanied by a deep eclipse. The object is ~2.1 mag brighter in V than GSC 15.2 (12h39m24s.02 +21d14'14".8 [J2000.0]) outside eclipses. An eclipse was fortunately caught centered at JD (geocentric) 2450084.34935, with a depth of ~1.3 mag and a duration of 12min. The profile of the eclipse is remarkably similar to those observed in HT Cas during the recent outburst, but with some hint of totality lasting 1-2 min.". Needless to say that also visual observations of this CVAP object, including eclipse timings, are highly encouraged. V701 Tau [UGSU, 15.0p - <21p] ============================= Kato also reports follow-up observations of the superhump development in V701 Tau (see CVC 76). He and his team monitored the object for another 6 hours on New Years night. Based on these data, and data obtained on 1995, December 29, they revised the superhump period as 0.06891 day. The completed photometric summary of the present outburst now becomes : ----------------------------------------------------------------------- DATE (UT) MAGN MS SEQ OBSERVER REMARKS SOURCE ----------------------------------------------------------------------- 1995 12 24.951 [15.6: mv GSC Vanmunster, T. CVC 75 1995 12 25.847 14.5 mv GSC Vanmunster, T. CVC 75 1995 12 25.866 14.5 mv GSC Poyner, G. CVC 75 1995 12 25.951 14.4 mv GSC Vanmunster, T. CVC 75 1995 12 25.983 14.1 mv GSC Broens, E. CVC 75 1995 12 26.552 14.4 CV *Kato & Ouda Team VSNET 1995 12 26.951 14.4:: mv GSC Poyner, G. VSNET 1995 12 27.023 14.5: mv GSC Broens, E. VSNET 1995 12 27.577 14.6 CV *Kato & Ouda Team VSNET 1995 12 27.903 [14.3 mv GSC Broens, E. VSNET 1995 12 27.957 14.4 mv GSC Pietz, J. VSNET 1995 12 28.934 [14.3 mv GSC Broens, E. VSNET 1995 12 28.940 14.6 mv GSC Pietz, J. VSNET 1995 12 28.985 14.7 mv GSC Vanmunster, T. VSNET 1995 12 29.566 14.6 CV *Kato & Ouda Team VSNET 1995 12 29.772 [14.3 mv GSC Poyner, G. VSNET 1995 12 30.453 14.8 CV *Kato & Ouda Team VSNET 1995 12 31.527 14.9 CV *Kato & Ouda Team VSNET Tonny Vanmunster