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: 0855+18 SY CNC 1841+37 AY LYR No. 437 0939+52 ER UMA 1953+77 AB DRA May 13, 1999 1608-28 V893 SCO ---------------------------------------------------------------------------- 0855+18 SY CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable SY CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 11.0903 12.9 BRJ MAY 12.88 11.7 KTO MAY 11.3799 12.6 SRX MAY 12.882 11.8 MUY MAY 11.894 12.5 MUY MAY 13.1924 11.8 CKN MAY 12.0903 12.7 BRJ MAY 13.4347 11.9 SRX MAY 12.2583 11.9 CKN ---------------------------------------------------------------------------- 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 MAY 11.910 15.3 PYG MAY 12.908 13.3 MUY MAY 11.939 13.9 MGH MAY 12.977 12.7 PYG MAY 12.2264 13.1 BTH ---------------------------------------------------------------------------- 1608-28 V893 SCORPII The cataclysmic variable V893 SCO may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 11.5576 14.0 SRX MAY 13.4938 13.0 SRX MAY 11.76 <13.9 MLF MAY 13.5417 13.0 SRX ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 12.035 <15.3 PYG MAY 12.962 13.8 MUY MAY 12.0472 <14.8 BMM MAY 13.014 13.1 PYG MAY 12.94 14.0 KTO ---------------------------------------------------------------------------- 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 MAY 12.058 14.7 PYG MAY 12.90 12.5 KTO MAY 12.1083 14.2 BRJ MAY 12.990 12.7 MUY ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. BIESMANS, BELGIUM MGH - H. MCGEE, ENGLAND BRJ - J. BORTLE, USA MLF - L. MONARD, SOUTH AFRICA BTH - T. BURROWS, USA MUY - E. MUYLLAERT, BELGIUM CKN - K. CASTLE, USA PYG - G. POYNER, ENGLAND KTO - T. KINNUNEN, FINLAND SRX - R. STUBBINGS, AUSTRALIA 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! ____________________________________________________________________________