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: 0641+28 IR GEM 0804+28 YZ CNC No. 604 0803+62 SU UMA 1953+77 AB DRA April 11, 2000 ---------------------------------------------------------------------------- 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 07.1640 16.23 CCDV ZRE APR 09.840 12.6 MUY APR 07.858 <13.6 MUY APR 09.858 12.4 PYG APR 09.1500 <13.8 SXN APR 10.2174 12.5 BTH APR 09.1559 <13.0 BEB ---------------------------------------------------------------------------- 0803+62 SU URSAE MAJORIS The dwarf nova type (SU UMA subclass prototype) cataclysmic variable SU UMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 06.9271 <13.9 DPV APR 09.1263 12.8 BEB APR 06.9403 13.9 JCN APR 09.2139 13.2 SXN APR 06.997 13.9 PYG APR 09.2233 12.8 BEB APR 07.8375 12.2 CMG APR 09.852 13.6 MUY APR 07.873 12.3 MUY APR 09.8646 12.8 JCN APR 07.8799 12.3 JCN APR 10.1686 12.7 BEB APR 09.060 13.3 RMQ APR 10.8660 13.6 JCN ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 09.867 14.5 PYG APR 11.0500 11.5 TSC APR 10.2542 <13.6 SXN APR 11.0590 11.7 BRJ APR 10.8639 12.0 POX APR 11.0604 11.7 MKJ APR 11.0472 12.0 DPL APR 11.1190 12.29 CCDV ZRE ---------------------------------------------------------------------------- 1953+77 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 APR 07.085 14.6 PYG APR 09.8826 13.9 JCN APR 07.869 14.2 RMQ APR 10.8792 12.9 JCN APR 07.9042 13.9 JCN APR 11.0486 13.3 BRJ APR 09.055 14.0: RMQ ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA MUY - E. MUYLLAERT, BELGIUM BRJ - J. BORTLE, USA POX - M. POXON, ENGLAND BTH - T. BURROWS, USA PYG - G. POYNER, ENGLAND CMG - G. COMELLO, NETHERLANDS RMQ - M. RESZELSKI, POLAND DPL - P. DOMBROWSKI, USA SXN - M. SIMONSEN, USA DPV - P. DUBOVSKY, SLOVAKIA TSC - S. TRACY, USA JCN - C. JONES, ENGLAND ZRE - R. ZISSELL, USA MKJ - J. MCKENNA, 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 on behalf of 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! ____________________________________________________________________________