THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 INTERNET: aavso@aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0006-12 WW CET 1612-54 HP NOR No. 320 0409-71 VW HYI 1723-42 MM SCO July 16, 1998 0854-24 VZ PYX 2138+43 SS CYG ---------------------------------------------------------------------------- 0006-12 WW CETI The dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 30.6250 14.0 SRX JUL 16.079 12.8 OB JUL 15.1 <12.9 OB JUL 16.5944 12.0 SRX ---------------------------------------------------------------------------- 0409-71 VW HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable VW HYI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 14.3035 13.6 SRX JUL 16.084 9.2 OB JUL 15.5299 12.9 SRX JUL 16.3701 9.4 SRX JUL 15.5514 12.8 SRX ---------------------------------------------------------------------------- 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 JUL 14.3646 <14.4 SRX JUL 16.3785 13.0 SRX JUL 16.3611 13.0 SRX ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 14.3576 <14.5 SRX JUL 15.712 13.3 MLF JUL 15.5326 13.0 SRX JUL 16.3972 13.1 SRX ---------------------------------------------------------------------------- 1723-42 MM SCORPII The dwarf nova type cataclysmic variable MM SCO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 14.4118 <14.6 SRX JUL 16.4222 13.8 SRX JUL 16.4014 13.8 SRX JUL 16.5542 13.8 SRX ---------------------------------------------------------------------------- 2138+43 SS CYGNI The dwarf nova type (SS CYG subclass prototype) cataclysmic variable SS CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 14.025 12.2 PYG JUL 15.9222 11.2 RMU JUL 14.2042 11.8 HSG JUL 15.9310 11.0 SJZ JUL 14.2708 11.5 BTH JUL 15.968 10.7 OJR JUL 14.372 11.7 MRV JUL 16.1740 10.1 BTB JUL 15.1616 11.6 BEB JUL 16.2500 10.0 BTH JUL 15.2118 11.6 HSG JUL 16.3160 9.7 HAB JUL 15.2194 11.1 RR JUL 16.4556 9.4 SQN JUL 15.2347 11.5 HAB JUL 16.4826 9.1 BTH JUL 15.4639 11.3 RR ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA OJR - J. OSORIO, SPAIN BTB - T. BRETL, USA PYG - G. POYNER, ENGLAND BTH - T. BURROWS, USA RMU - M. RODRIGUEZ MARCO, SPAIN HAB - R. HAYS JR., USA RR - R. ROYER, USA HSG - G. HANSON II, USA SJZ - J. SPEIL, POLAND MLF - L. MONARD, SOUTH AFRICA SQN - L. SHAW, USA MRV - R. MODIC, USA SRX - R. STUBBINGS, AUSTRALIA OB - M. OVERBEEK, SOUTH AFRICA 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 ____________________________________________________________________________ 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 sending a message to: observations@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 We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________