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: 0006-12 WW CET 0217+70 AM CAS No. 536 0120+31 TY PSC 0518+00 BI ORI December 1, 1999 0130+31 TW TRI 0822+25 AT CNC ---------------------------------------------------------------------------- 0006-12 WW CETI The dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 29.4757 13.7 SRX NOV 30.80 12.6 VET NOV 29.7188 13.4 DPV DEC 01.0160 13.3 CGF ---------------------------------------------------------------------------- 0120+31 TY PISCIUM The dwarf nova type (SU UMA subclass) cataclysmic variable TY PSC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 28.1194 <14.3 SXN NOV 30.79 12.6 VET NOV 29.7535 <14.0 DPV DEC 01.1313 12.7 SXN NOV 30.1479 <14.0 SXN DEC 01.179 13.0 CCDV OCN NOV 30.67 12.2 KTO DEC 01.2243 12.5 SXN NOV 30.779 13.1 OJR ---------------------------------------------------------------------------- 0130+31 TW TRIANGULI The dwarf nova type (Z CAM subclass) cataclysmic variable TW TRI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 25.347 16.3 CCDV OCN DEC 01.186 14.0 CCDV OCN NOV 28.1576 <13.1 SXN DEC 01.274 14.5 CCDV OCN DEC 01.1694 <13.1 SXN ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 29.8021 13.3 DPV DEC 01.0208 12.7 CGF NOV 30.774 12.9 OJR ---------------------------------------------------------------------------- 0518+00 BI ORIONIS The dwarf nova type cataclysmic variable BI ORI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 21.5132 <15.1 HSG DEC 01.2278 14.3: SXN NOV 28.1993 <13.7 SXN DEC 01.238 14.3 CCDV OCN ---------------------------------------------------------------------------- 0822+25 AT CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable AT CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 30.019 14.5 PYG DEC 01.3451 12.5 SXN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. CHAPLE JR., USA OJR - J. OSORIO, SPAIN DPV - P. DUBOVSKY, SLOVAKIA PYG - G. POYNER, ENGLAND HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA KTO - T. KINNUNEN, FINLAND SXN - M. SIMONSEN, USA OCN - S. O'CONNOR, CANADA 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! ____________________________________________________________________________