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: 0854-24 VZ PYX 1934+30 EM CYG No. 624 0956+34 RU LMI 1937+21 FY VUL May 24, 2000 1338-07 HS VIR 1951-09 UU AQL 1344+08 CR BOO 1953+77 AB DRA 1552+72 SS UMI 2043+41 V516 CYG 1804+67 EX DRA 2053+25 VW VUL 1903-17 V1089 SGR 2131+40 V630 CYG ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.4583 <14.5 PEX MAY 24.285 12.8 LMK MAY 19.5465 13.5 PEX MAY 24.393 12.7 SRX MAY 21.271 <13.8 LMK MAY 24.4472 12.8 PEX MAY 23.688 12.7 MLF MAY 20387 13.8 SRX ---------------------------------------------------------------------------- 0956+34 RU LEONIS MINORIS The dwarf nova type cataclysmic variable RU LMI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 21.935 <15.1 PYG MAY 23.1549 14.3 HSG MAY 22.1493 <13.6 SXN MAY 23.2486 14.3 HSG MAY 22.1681 14.9 HSG MAY 24.1715 14.1 HSG MAY 22.2292 14.9 HSG MAY 24.2611 14.2 HSG ---------------------------------------------------------------------------- 1338-07 HS VIRGINIS The dwarf nova type cataclysmic variable HS VIR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 22.5368 14.5 PEX MAY 24.492 13.6 SRX MAY 23.394 14.0 SRX MAY 24.5643 13.3 PEX MAY 24.385 13.6 SRX ---------------------------------------------------------------------------- 1344+08 CR BOOTIS The variable star CR BOO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 20.268 15.2 CCDV OCN MAY 23.2514 14.0 HSG MAY 21.917 14.3 PYG MAY 23.994 14.0 PYG MAY 22.1722 14.6 HSG MAY 24.2368 13.9 HSG MAY 22.922 13.9 MUY ---------------------------------------------------------------------------- 1552+72 SS URSAE MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SS UMI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 22.1563 <15.8 HSG MAY 23.923 14.3 RMQ MAY 22.938 <14.2 MUY MAY 24.019 14.0 PYG MAY 23.1576 14.6 HSG MAY 24.1597 14.3 HSG MAY 23.2479 14.5 HSG MAY 24.2604 14.4 HSG ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 19.972 14.9 PYG MAY 22.2278 13.3 HSG MAY 19.974 <14.0 RMQ MAY 22.940 13.3 MUY MAY 19.998 <13.4 MUY MAY 23.1597 13.5 HSG MAY 22.010 13.8 PYG MAY 23.921 13.7 RMQ MAY 22.1583 13.8 HSG MAY 24.017 13.5 PYG MAY 22.1750 13.6 HSG MAY 24.1618 13.4 HSG ---------------------------------------------------------------------------- 1903-17 V1089 SAGITTARII The variable star V1089 SGR appears to be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 15.806 <14.4 SRX MAY 24.506 14.4 SRX ---------------------------------------------------------------------------- 1934+30 EM CYGNI The dwarf nova type (Z CAM subclass) cataclysmic variable EM CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 19.967 13.7 RMQ MAY 22.969 12.7 MUY MAY 20.012 14.0: MUY MAY 23.2625 13.0 HSG MAY 20.039 12.7 PYG MAY 23.90 12.6 VET MAY 20.89 12.5 VET MAY 23.943 12.7 RMQ MAY 22.055 12.9 PYG MAY 24.060 13.0 PYG MAY 22.2382 12.5 HSG MAY 24.2500 13.5 HSG MAY 22.90 12.6 VET MAY 24.392 12.8 LMK ---------------------------------------------------------------------------- 1937+21 FY VULPECULAE The dwarf nova type (Z CAM subclass) cataclysmic variable FY VUL is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.024 14.5 RMQ MAY 22.057 13.8 PYG MAY 14.002 14.4 RMQ MAY 23.947 13.5 RMQ MAY 15.996 14.3 RMQ MAY 24.063 13.8 PYG MAY 20.041 14.2 PYG ---------------------------------------------------------------------------- 1951-09 UU AQUILAE The dwarf nova type cataclysmic variable UU AQL is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.4222 <15.4 HSG MAY 22.584 11.5 SRX MAY 19.8792 <14.5 PEX MAY 22.8618 11.3 PEX MAY 20.024 <13.0 MUY MAY 22.993 11.5 MUY MAY 20.7771 12.7 PEX MAY 24.578 11.5 SRX ---------------------------------------------------------------------------- 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 22.014 14.7 PYG MAY 24.021 13.0 PYG MAY 22.1569 14.3 HSG MAY 24.1604 12.6 HSG MAY 22.942 14.3 MUY MAY 24.2597 12.6 HSG MAY 23.1583 14.0 HSG MAY 24.364 12.4 LMK MAY 23.920 12.5 RMQ ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 22.051 <15.2 PYG MAY 24.056 14.1 PYG MAY 23.2660 13.7 HSG MAY 24.2535 13.7 HSG ---------------------------------------------------------------------------- 2053+25 VW VULPECULAE The dwarf nova type 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 20.050 15.3 PYG MAY 24.040 13.6 PYG MAY 22.076 14.0 PYG ---------------------------------------------------------------------------- 2131+40 V630 CYGNI The dwarf nova type (possible SU UMA subclass) cataclysmic variable V630 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.4181 <15.2 HSG MAY 22.061 <15.0 PYG MAY 20.044 <14.9 PYG MAY 24.066 14.5 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: HSG - G. HANSON II, USA PYG - G. POYNER, ENGLAND LMK - M. LINNOLT, USA RMQ - M. RESZELSKI, POLAND MLF - L. MONARD, SOUTH AFRICA SRX - R. STUBBINGS, AUSTRALIA MUY - E. MUYLLAERT, BELGIUM SXN - M. SIMONSEN, USA OCN - S. O'CONNOR, CANADA VET - M. VERDENET, FRANCE 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! ____________________________________________________________________________