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: 0217+70 AM CAS 1804+67 EX DRA No. 401 0814+73 Z CAM 1947+58 V542 CYG March 1, 1999 0854-24 VZ PYX 2023+43 V503 CYG ---------------------------------------------------------------------------- 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 FEB 25.0 <14.2 CGF FEB 27.800 13.2 MUY FEB 27.017 12.8 CGF FEB 28.014 13.1 CGF ---------------------------------------------------------------------------- 0814+73 Z CAMELOPARDALIS The dwarf nova type (Z CAM subclass prototype) cataclysmic variable Z CAM appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 22.928 13.1 PYG FEB 27.163 12.4 MRV FEB 24.859 12.7 MUY FEB 27.845 10.9 MUY FEB 27.029 12.7 CGF FEB 28.082 10.9 CGF ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 20.4597 15.0 SRX FEB 28.4417 12.8 SRX FEB 23.84 <14.7 MLF FEB 28.775 12.7 MLF FEB 26.4910 <13.8 SRX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 23.135 15.5 PYG FEB 28.184 13.0 MUY FEB 23.3813 15.2 CCDV ZRE FEB 28.3021 12.9 CCDV ZRE FEB 27.3549 13.2 CCDV ZRE ---------------------------------------------------------------------------- 1947+58 V542 CYGNI The dwarf nova type (possible SS CYG subclass) cataclysmic variable V542 CYG may be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials FEB 28.205 13.9: MUY According to the AAVSO International Database this star is fainter than visual magnitude 15.5 during quiescence. ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG may be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials FEB 28.212 14.0: MUY According to the AAVSO International Database this star is fainter than visual magnitude 16.0 during quiescence. ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND MLF - L. MONARD, SOUTH AFRICA SRX - R. STUBBINGS, AUSTRALIA MRV - R. MODIC, USA ZRE - R. ZISSELL, USA MUY - E. MUYLLAERT, BELGIUM 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! ____________________________________________________________________________