THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 http://www.aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0945+12 X LEO 1953+77 AB DRA No. 535 1011+72 CI UMA 2007+20 FG SGE November 30, 1999 1831+38 LL LYR 2158+41 BL LAC 1925+42 V1504 CYG ---------------------------------------------------------------------------- 0945+12 X LEONIS The dwarf nova type cataclysmic variable X LEO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 21.5292 <15.3 HSG NOV 30.04 12.0 KTO ---------------------------------------------------------------------------- 1011+72 CI URSAE MAJORIS The dwarf nova type cataclysmic variable CI UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 20.067 <15.3 PYG NOV 30.06 14.9 KTO ---------------------------------------------------------------------------- 1831+38 LL LYRAE The dwarf nova type cataclysmic variable LL LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 19.0958 <15.0 HSG NOV 29.7292 13.2 DPV NOV 19.774 <14.8 PYG NOV 29.737 13.3 PYG NOV 28.0326 <13.4 SXN ---------------------------------------------------------------------------- 1925+42 V1504 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V1504 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 12.038 17.6 CCDV OCN NOV 17.0868 <14.5 SXN NOV 15.760 <14.5 MUY NOV 29.819 15.3 PYG NOV 16.867 <15.0 PYG ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 25.830 <13.5 MUY NOV 29.8056 12.7 DPV NOV 29.728 13.0 PYG NOV 29.8882 12.6 POX ---------------------------------------------------------------------------- 2007+20 FG SAGITTAE The variable star FG SGE may be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 16.8375 15.3: JCN NOV 19.8646 <14.6 JCN NOV 17.8354 <15.1 JCN NOV 29.0389 <13.8 DKS NOV 19.785 15.0 PYG NOV 29.749 14.7 PYG ---------------------------------------------------------------------------- 2158+41 BL LACERTAE BL LAC (the prototype of BL LAC type objects) appears to be active, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 27.819 14.3 OJR NOV 29.0604 13.4 DKS NOV 27.86 13.3 VET NOV 29.830 12.9 PYG NOV 28.0806 13.2 SXN NOV 30.1375 12.8 SXN NOV 28.82 12.7 VET ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DKS - S. DVORAK, USA OCN - S. O'CONNOR, CANADA DPV - P. DUBOVSKY, SLOVAKIA OJR - J. OSORIO, SPAIN HSG - G. HANSON II, USA POX - M. POXON, ENGLAND JCN - C. JONES, ENGLAND PYG - G. POYNER, ENGLAND KTO - T. KINNUNEN, FINLAND SXN - M. SIMONSEN, USA MUY - E. MUYLLAERT, BELGIUM VET - M. VERDENET, FRANCE Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Janet A. Mattei, Director Rebecca Pellock, Technical Assistant ____________________________________________________________________________ Symbols may include: < = fainter than magnitude given (variable not seen) : = uncertain CCDV = Charge-coupled device with (V) filter If you would like to contribute to AAVSO NEWS FLASH, please send observations of unusual variable star activity to: observations@aavso.org Those who wish to subscribe (free of charge) or unsubscribe to NEWS FLASH may do so by visiting the following web page: http://www.aavso.org If you would like data from the AAVSO International Database for research purposes, please send your request to: Janet Mattei, AAVSO Director, at aavso@aavso.org An archive of past issues of the News Flash is available at the following web page: http://www.aavso.org/newsflash/ We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________