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: 0206+57A TZ PER 1921+50 CH CYG No. 321 1133+03 T LEO 1953+77 AB DRA July 20, 1998 ---------------------------------------------------------------------------- 0206+57A TZ PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable TZ PER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 17.016 14.5 PYG JUL 19.1715 13.5 BRJ JUL 18.7229 13.0 SQN JUL 20.4486 12.6 SQN ---------------------------------------------------------------------------- 1133+03 T LEONIS The dwarf nova type (SU UMA subclass) cataclysmic variable T LEO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 15.1729 <13.6 HSG JUL 18.4215 11.9 SRX JUL 16.3667 15.1 SRX JUL 19.1674 12.1 HSG JUL 18.3785 12.0 SRX JUL 19.3701 11.7 SRX ---------------------------------------------------------------------------- 1921+50 CH CYGNI The symbiotic variable CH CYG is brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 12.0870 8.7 WEF JUL 15.4722 8.6 SQN JUL 12.1229 8.8 KMA JUL 18.3250 8.0 KMA JUL 12.9166 8.7 TUB JUL 18.892 7.6 DPA JUL 13.065 8.8 PYG JUL 19.0920 7.8 WEF JUL 13.1050 8.7 WEF JUL 19.1153 7.9 KMA JUL 13.1479 8.7 KMA JUL 19.1389 7.9 BRJ JUL 14.1354 8.5 BRJ JUL 19.2403 7.8 BTH JUL 14.2583 8.7 BTH JUL 19.2465 7.8 DIL JUL 15.4410 8.4 HSG JUL 20.0860 7.8 WEF ---------------------------------------------------------------------------- 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 JUL 19.091 13.8 CGF JUL 19.2493 12.5 BTH JUL 19.1174 13.5 BRJ JUL 19.965 12.9 PYG JUL 19.1792 13.6 HSG JUL 20.073 12.7 CGF ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA KMA - M. KOMOROUS, CANADA BTH - T. BURROWS, USA PYG - G. POYNER, ENGLAND CGF - G. CHAPLE JR., USA SQN - L. SHAW, USA DIL - W. DILLON, USA SRX - R. STUBBINGS, AUSTRALIA DPA - A. DIEPVENS, BELGIUM TUB - V. TUBOLY, HUNGARY HSG - G. HANSON II, USA WEF - F. WEST, USA 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! ____________________________________________________________________________