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: 0217+70 AM CAS 1140-03 TW VIR No. 438 0803+62 SU UMA 1338-07 HS VIR May 17, 1999 0814+73 Z CAM 1702-25 V2051 OPH 0854-24 VZ PYX 1805-14 UZ SER 0939+52 ER UMA 1925+42 V1504 CYG 0945+34 RZ LMI 2103+36 V1060 CYG ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 12.1090 14.4 BRJ MAY 15.1181 12.8 BRJ MAY 14.1014 13.4 BRJ MAY 17.1132 14.2 BRJ ---------------------------------------------------------------------------- 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 MAY 12.980 14.1 PYG MAY 15.889 12.0 MUY MAY 13.0847 <13.4 MDP MAY 15.8938 12.3 JCN MAY 13.901 12.9 MUY MAY 15.899 12.2 OJR MAY 13.909 13.0 DPV MAY 16.897 12.9 OJR MAY 14.0868 13.2 BRJ MAY 16.919 13.1 PYG MAY 15.1049 12.2 BRJ MAY 16.927 13.1 MGH MAY 15.1368 12.0 DKS MAY 17.0979 12.9 BRJ ---------------------------------------------------------------------------- 0814+73 Z CAMELOPARDALIS The dwarf nova type (Z CAM subclass prototype) cataclysmic variable Z CAM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 14.0889 13.0 BRJ MAY 16.0479 10.8 CGF MAY 14.1 12.8 CGF MAY 16.06 11.0 DGP MAY 14.2083 11.1 BTH MAY 16.2056 10.4 BTH MAY 15.06 11.6 DGP MAY 16.87 10.7 GUN MAY 15.1069 11.7 BRJ MAY 16.8896 10.4 KHL MAY 15.1396 11.7 DKS MAY 16.901 10.6 OJR MAY 15.2097 10.4 BTH MAY 16.922 10.7 PYG MAY 15.87 11.0 GUN MAY 17.06 10.7 DGP MAY 15.891 10.8 MUY MAY 17.0604 10.6 CGF MAY 15.9 11.2 VET MAY 17.1000 10.9 BRJ MAY 15.902 10.7 OJR ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.4382 15.0 SRX MAY 16.713 13.8 MLF MAY 15.3688 12.8 SRX ---------------------------------------------------------------------------- 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 15.898 <14.2 MUY MAY 16.933 13.6 MGH MAY 16.1 <14.1 CGF MAY 17.0833 13.1 CGF MAY 16.2104 13.0 BTH MAY 17.0993 13.4 BRJ MAY 16.915 13.5 PYG ---------------------------------------------------------------------------- 0945+34 RZ LEONIS MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable RZ LMI is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 14.0840 <15.0 BRJ MAY 16.909 14.4 PYG MAY 14.1 <14.1 CGF MAY 17.0764 13.7 CGF MAY 15.1028 14.4 BRJ MAY 17.0951 <15.2 BRJ MAY 16.0833 14.2 CGF ---------------------------------------------------------------------------- 1140-03 TW VIRGINIS The dwarf nova type cataclysmic variable TW VIR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.4507 <15.0 SRX MAY 15.915 13.5 MUY MAY 13.894 <13.9 MUY MAY 15.916 12.7 OJR MAY 15.1306 13.6 DKS MAY 16.1125 13.6 CGF MAY 15.2986 13.4 SRX MAY 16.920 13.5 OJR MAY 15.9 14.1 VET MAY 17.0986 13.3 CGF ---------------------------------------------------------------------------- 1338-07 HS VIRGINIS The dwarf nova type cataclysmic variable HS VIR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 14.3847 <14.8 SRX MAY 15.707 14.0 PEX MAY 15.3875 14.1 SRX ---------------------------------------------------------------------------- 1702-25 V2051 OPHIUCHI The nova-like variable V2051 OPH appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.5215 15.3 SRX MAY 15.5917 13.2 SRX MAY 15.4806 13.5 SRX ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (possible Z CAM subclass) cataclysmic variable UZ SER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 09.7931 <14.0 SRX MAY 15.5660 13.2 SRX MAY 13.4861 <13.6 SRX MAY 16.049 13.4 MUY ---------------------------------------------------------------------------- 1925+42 V1504 CYGNI The dwarf nova type (possible Z CAM subclass) cataclysmic variable V1504 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 14.96 <15.1 KTO MAY 15.979 <14.5 MUY MAY 15.96 <14.8 KTO MAY 16.994 14.7 PYG ---------------------------------------------------------------------------- 2103+36 V1060 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V1060 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 14.97 <14.1 KTO MAY 16.028 13.2 MUY MAY 15.966 12.4 KTO MAY 17.051 12.6 PYG MAY 16.028 13.2 MUY ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA MDP - P. MCDONALD, CANADA BTH - T. BURROWS, USA MGH - H. MCGEE, ENGLAND CGF - G. CHAPLE JR., USA MLF - L. MONARD, SOUTH AFRICA DGP - G. DYCK, USA MUY - E. MUYLLAERT, BELGIUM DKS - S. DVORAK, USA OJR - J. OSORIO, SPAIN DPV - P. DUBOVSKY, SLOVAKIA PEX - A. PEARCE, AUSTRALIA GUN - J. GUNTHER, FRANCE PYG - G. POYNER, ENGLAND JCN - C. JONES, ENGLAND SRX - R. STUBBINGS, AUSTRALIA KHL - M. KOHL, SWITZERLAND VET - M. VERDENET, FRANCE KTO - T. KINNUNEN, FINLAND 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! ____________________________________________________________________________