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: 0409-71 VW HYI No. 339 1934+30 EM CYG September 8, 1998 2138+43 SS CYG ---------------------------------------------------------------------------- 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 SEP 05.4132 <12.9 SRX SEP 07.5347 9.8 SRX SEP 06.1 <12.0: OB SEP 08.129 9.0 OB SEP 07.113 11.3 OB SEP 08.5556 9.8 SRX SEP 07.121 11.3 OB ---------------------------------------------------------------------------- 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 SEP 02.91 13.2 KTO SEP 05.94 12.8 KTO SEP 03.89 13.0 KTO SEP 06.1960 12.6 CCDV ZRE SEP 05.06 12.8 GRL SEP 07.79 12.4 KTO SEP 05.1000 12.9 CCDV ZRE SEP 08.1903 12.4 HSG SEP 05.249 12.8 OCN ---------------------------------------------------------------------------- 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 SEP 05.0410 12.0 KMA SEP 07.8076 10.4 KIS SEP 05.05 12.2 GRL SEP 08.0917 9.2 KMA SEP 05.82 12.2 KTO SEP 08.1180 9.2 BEB SEP 06.0396 11.7 KMA SEP 08.1313 9.4 HAB SEP 06.2063 11.9 KMA SEP 08.1792 9.0 BTH SEP 06.80 12.0 KTO SEP 08.2000 9.6 HSG SEP 07.1042 11.5 DLA SEP 08.2313 9.3 RR SEP 07.4042 11.6 BTH SEP 08.4896 9.2 RR SEP 07.78 10.7 KTO ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA KMA - M. KOMOROUS, CANADA BTH - T. BURROWS, USA KTO - T. KINNUNEN, FINLAND DLA - A. DILL, USA OB - M. OVERBEEK, SOUTH AFRICA GRL - B. GRANSLO, NORWAY OCN - S. O'CONNOR, CANADA HAB - R. HAYS JR., USA RR - R. ROYER, USA HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA KIS - G. KRISCH, F. R. GERMANY ZRE - R. ZISSELL, USA Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Rebecca Pellock, Technical Assistant on behalf of Janet A. Mattei, Director ____________________________________________________________________________ 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! ____________________________________________________________________________