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 0809-76 Z CHA No. 659 0139+37 AR AND 1841+37 AY LYR August 16, 2000 ---------------------------------------------------------------------------- 0006-12 WW CETI The dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 12.2708 <13.6 SXN AUG 16.124 11.8 OB ---------------------------------------------------------------------------- 0139+37 AR ANDROMEDAE The dwarf nova type cataclysmic variable AR AND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 12.069 <15.2 PYG AUG 12.3007 <13.9 SXN AUG 12.141 <14.5 OJR AUG 14.953 13.0 MUY ---------------------------------------------------------------------------- 0809-76 Z CHAMAELONIS The dwarf nova type (SU UMA subclass) cataclysmic variable Z CHA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 16.378 12.2 SRX AUG 16.386 12.3 SRX According to the AAVSO International Database this star is fainter than visual magnitude 14.5 during quiescence. ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 11.1180 19.15 CCDV ZRE AUG 14.884 <14.2 MUY AUG 11.9187 <15.3 JCN AUG 15.87 13.7 VET AUG 11.988 <14.7 PYG AUG 16.0805 13.9 DPL AUG 12.1556 <13.6 SXN AUG 16.0826 13.9 DPL ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DPL - P. DOMBROWSKI, USA PYG - G. POYNER, ENGLAND JCN - C. JONES, ENGLAND SRX - R. STUBBINGS, AUSTRALIA MUY - E. MUYLLAERT, BELGIUM SXN - M. SIMONSEN, USA OB - M. OVERBEEK, SOUTH AFRICA VET - M. VERDENET, FRANCE OJR - J. OSORIO, SPAIN ZRE - R. ZISSELL, USA 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! ____________________________________________________________________________