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: 0822+25 AT CNC 1805-14 UZ SER No. 626 0939+52 ER UMA 1910-33 RY SGR May 26, 2000 0945+12 X LEO ---------------------------------------------------------------------------- 0822+25 AT CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable AT CNC may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 22.1375 <13.4 SXN MAY 24.299 13.0 LMK MAY 22.363 14.3 SRX MAY 25.8646 13.2: DPV ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 22.901 <14.2 MUY MAY 25.1667 13.9 HSG MAY 23.1632 14.8: HSG MAY 25.897 13.2 OJR MAY 23.912 <13.7 RMQ MAY 25.9063 13.2 DPV MAY 24.1660 15.0: HSG MAY 26.1660 13.5 HSG MAY 24.339 <13.5 LMK MAY 26.319 13.9 LMK MAY 24.8924 <13.4 DPV ---------------------------------------------------------------------------- 0945+12 X LEONIS The dwarf nova type cataclysmic variable X LEO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 25.1556 <15.3 HSG MAY 26.1715 12.8 HSG MAY 25.8715 <13.5 DPV MAY 26.2326 12.6 HSG MAY 25.895 <14.1 OJR MAY 26.291 12.5 LMK MAY 26.0840 12.9 MKJ MAY 26.306 12.4 LMK MAY 26.1014 13.1 DPL MAY 26.331 12.5 LMK MAY 26.1549 12.9 HSG ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (POSSIBLE Z CAM subclass) cataclysmic variable UZ SER may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.4056 14.0 HSG MAY 22.953 13.5 MUY MAY 15.817 13.5 SRX MAY 25.4583 13.7 HSG MAY 16.337 13.41 CCDV OCN MAY 25.8333 13.7 PEX MAY 19.8590 13.7 PEX MAY 26.268 13.2 SXN MAY 22.8528 13.6 PEX ---------------------------------------------------------------------------- 1910-33 RY SAGITTARII The dwarf nova type (R CrB subclass) cataclysmic variable RY SGR may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 06.8896 9.8 PEX MAY 17.1 9.2 OB MAY 07.2500 9.2 OSE MAY 26.138 7.7 OB MAY 08.8625 9.4 PEX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DPL - P. DOMBROWSKI, USA OCN - S. O'CONNOR, CANADA DPV - P. DUBOVSKY, SLOVAKIA OJR - J. OSORIO, SPAIN HSG - G. HANSON II, USA OSE - S. OTERO, ARGENTINA LMK - M. LINNOLT, USA PEX - A. PEARCE, AUSTRALIA MKJ - J. MCKENNA, USA RMQ - M. RESZELSKI, POLAND MUY - E. MUYLLAERT, BELGIUM SRX - R. STUBBINGS, AUSTRALIA OB - M. OVERBEEK, SOUTH AFRICA SXN - M. SIMONSEN, USA Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Gamze Menali, Technical Assistant On behalf of Janet A. Mattei, Director ____________________________________________________________________________ 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! ____________________________________________________________________________