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: 0207-63 WX HYI 0939+52 ER UMA No. 611 0641+28 IR GEM 1804+67 EX DRA April 27, 2000 0814+73 Z CAM ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 23.3743 <14.0 SRX APR 27.3868 12.8 SRX APR 26.3910 <13.8 SRX ---------------------------------------------------------------------------- 0641+28 IR GEMINORUM The dwarf nova type (SU UMA subclass) cataclysmic variable IR GEM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 25.0993 16.04 CCDV GKA APR 26.8438 <13.7 DPV APR 25.1438 <13.8 SXN APR 26.851 12.7 MUY APR 25.1521 <14.9 HSG APR 27.0894 12.7 BEB APR 25.292 <13.4 LMK APR 27.1771 12.8 HSG ---------------------------------------------------------------------------- 0814+73 Z CAMELOPARDALIS The dwarf nova type (Z CAM subclass prototype) cataclysmic variable Z CAM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 24.954 13.3 RMQ APR 26.867 11.2 MUY APR 25.1174 13.2 KMA APR 26.9490 11.4 SJZ APR 25.1389 12.9 HSG APR 27.1101 11.1 BEB APR 26.1090 12.7 KMA APR 27.1486 10.9 SXN APR 26.856 11.3 RMQ APR 27.1792 10.8 HSG APR 26.8563 12.0 VFK APR 27.2215 11.2: ABB APR 26.8576 11.4 DPV ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 25.2118 14.9: HSG APR 27.1169 13.1 BEB APR 26.8681 13.0 DPV APR 27.1646 12.8 SXN APR 26.870 12.9 MUY APR 27.1965 13.2 HSG APR 26.878 12.7 RMQ ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The dwarf nova type (UG+E subclass) cataclysmic variable EX DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 25.2271 <15.3 HSG APR 26.907 14.2 MUY APR 26.882 <14.2 RMQ APR 27.1910 13.9 HSG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: ABB - B. ADAMS, USA MUY - E. MUYLLAERT, BELGIUM BEB - R. BERG, USA RMQ - M. RESZELSKI, POLAND DPV - P. DUBOVSKY, SLOVAKIA SJZ - J. SPEIL, POLAND GKA - K. GRAHAM, USA SRX - R. STUBBINGS, AUSTRALIA HSG - G. HANSON II, USA SXN - M. SIMONSEN, USA KMA - M. KOMOROUS, CANADA VFK - F. VOHLA, GERMANY LMK - M. LINNOLT, 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! ____________________________________________________________________________