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: 1552+72 SS UMI 2023+43 V503 CYG No. 442 1805-14 UZ SER 2043+41 V516 CYG May 26, 1999 1911-00 FO AQL 2053+25 VW VUL 1953+77 AB DRA ---------------------------------------------------------------------------- 1552+72 SS URSAE MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SS UMI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 17.1104 15.3 BRJ MAY 24.994 13.9 PYG MAY 18.923 <14.2 MUY ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (possible Z CAM subclass) cataclysmic variable UZ SER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 23.3813 14.4 CCDV COO MAY 23.852 13.6 PEX ---------------------------------------------------------------------------- 1911-00 FO AQUILAE The dwarf nova type (SS CYG subclass) cataclysmic variable FO AQL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 17.3140 16.66 CCDV ZRE MAY 23.861 13.5 PEX MAY 17.7715 <14.4 SRX ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.924 13.9 MUY MAY 23.919 13.2 MUY MAY 22.991 <13.6 MUY MAY 24.996 13.0 PYG ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 17.3310 17.24 CCDV ZRE MAY 23.934 <13.8 MUY MAY 18.948 <13.8 MUY MAY 25.033 14.5 PYG MAY 22.986 <13.8 MUY ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 02.3160 17.11 CCDV ZRE MAY 25.031 14.0 PYG MAY 17.051 <15.5 PYG ---------------------------------------------------------------------------- 2053+25 VW VULPECULAE The dwarf nova type (SU UMA subclass) cataclysmic variable VW VUL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 17.040 15.6 PYG MAY 25.019 13.5 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA PYG - G. POYNER, ENGLAND COO - L. COOK, USA SRX - R. STUBBINGS, AUSTRALIA MUY - E. MUYLLAERT, BELGIUM ZRE - R. ZISSELL, USA PEX - A. PEARCE, 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! ____________________________________________________________________________