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: 0814+73 Z CAM 1640+25 AH HER No. 329 1247-28 EX HYA August 10, 1998 ---------------------------------------------------------------------------- 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 AUG 04.4264 13.6 HSG AUG 08.901 11.4 PYG AUG 04.917 13.2 PYG AUG 09.2847 10.8 CMG AUG 05.1 13.5 CGF AUG 09.894 10.7 PYG AUG 05.910 12.9 PYG AUG 10.0847 10.4 CGF AUG 06.949 12.9 PYG AUG 10.0875 10.9 BRJ ---------------------------------------------------------------------------- 1247-28 EX HYDRAE The eclipsing variable EX HYA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 01.69 13.4 MLF AUG 09.4042 9.4 SRX AUG 02.69 13.0 MLF AUG 09.4139 9.5 SRX AUG 05.69 12.7 MLF AUG 09.4528 9.4 SRX AUG 08.3847 13.5 SRX AUG 09.746 9.5 MLF AUG 09.3771 9.6 SRX AUG 10.4292 11.3: SRX AUG 09.3889 9.5 SRX AUG 10.4313 11.3: SRX AUG 09.3965 9.5 SRX AUG 10.4486 11.2: SRX ---------------------------------------------------------------------------- 1640+25 AH HERCULIS The dwarf nova type (Z CAM subclass) cataclysmic variable AH HER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 06.91 14.3 KTO AUG 09.2014 12.1 BTH AUG 06.956 <13.7 PYG AUG 09.2882 11.6 CMG AUG 08.89 11.8 KTO AUG 09.86 11.7 SCZ AUG 08.916 12.0 PYG AUG 09.909 11.8 PYG AUG 09.0549 12.0 DPL AUG 10.0576 12.2 CGF AUG 09.0778 12.1 CGF AUG 10.0924 10.9 BRJ AUG 09.0938 11.0 GRI ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA HSG - G. HANSON II, USA BTH - T. BURROWS, USA KTO - T. KINNUNEN, FINLAND CGF - G. CHAPLE JR., USA MLF - L. MONARD, SOUTH AFRICA CMG - G. COMELLO, HOLLAND PYG - G. POYNER, ENGLAND DPL - P. DOMBROWSKI, USA SCZ - E. SCHWEITZER, FRANCE GRI - J. GRIESE III, USA SRX - R. STUBBINGS, 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 ____________________________________________________________________________ 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! ____________________________________________________________________________