THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 INTERNET: aavso@aavso.org * * * AAVSO NEWS FLASH * * * Subject: AM CAS, V1504 CYG, AB DRA No. 301 May 20, 1998 ---------------------------------------------------------------------------- AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.1000 14.2 BRJ MAY 19.1160 13.3 BRJ ---------------------------------------------------------------------------- V1504 CYGNI The dwarf nova type (Possible Z CAM 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 APR 27.029 <15.7 PYG MAY 09.998 <15.0 PYG MAY 04.068 <15.3 PYG MAY 19.038 15.2 PYG ---------------------------------------------------------------------------- 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 MAY 19.028 14.4 PYG MAY 20.0722 12.7 BMM MAY 19.1153 13.9 BRJ MAY 20.3510 12.8 CCDV ZRE MAY 19.2930 13.9 CCDV ZRE ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. BIESMANS, BELGIUM PYG - G. POYNER, ENGLAND BRJ - J. BORTLE, USA 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 ____________________________________________________________________________ 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 sending a message to: observations@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 We look forward to including your observations in future editions of AAVSO NEWS FLASH! ___________________________________________________________________________