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: 0043+56B GX CAS 1807-27 V1830 SGR No. 660 0130+31 TW TRI 1848+26 CY LYR August 21, 2000 0445-76 TU MEN 1953+77 AB DRA 0814+73 Z CAM 2026-45 TU IND 1640+25 AH HER ---------------------------------------------------------------------------- 0043+56B GX CASSIOPEIAE The dwarf nova type (SU UMA subclass) cataclysmic variable GX CAS is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 12.049 <15.2 PYG AUG 21.060 13.7 PYG AUG 15.895 <14.1 MUY AUG 21.0875 13.9 BRJ AUG 16.887 <13.8 RMQ AUG 21.1333 13.9 SXN AUG 17.917 <14.2 RMQ AUG 21.2757 13.9 SXN ---------------------------------------------------------------------------- 0130+31 TW TRIANGULI The dwarf nova type (Z CAM subclass) cataclysmic variable TW TRI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 20.2222 13.5: SXN AUG 21.2639 13.6 SXN ---------------------------------------------------------------------------- 0445-76 TU MENSAE The dwarf nova type (SU UMA subclass) cataclysmic variable TU MEN appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 17.380 <14.0 SRX AUG 21.447 12.2 SRX AUG 20.417 11.8 SRX ---------------------------------------------------------------------------- 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 17.860 13.6 MUY AUG 20.878 13.2 RMQ AUG 17.938 13.2 RMQ AUG 21.0528 12.8 CGF AUG 18.892 13.4 RMQ AUG 21.0625 12.3 BRJ AUG 19.975 13.5 RMQ ---------------------------------------------------------------------------- 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 14.867 13.2 MUY AUG 18.871 12.2 RMQ AUG 14.913 13.2 PYG AUG 19.8222 11.9 DPV AUG 15.87 12.8 VET AUG 19.87 11.8 VET AUG 16.0540 13.07 CCDV ZRE AUG 19.977 12.1 RMQ AUG 16.0770 12.9 DPL AUG 20.0562 11.8 DPL AUG 16.861 12.9 MUY AUG 20.0780 12.15 CCDV ZRE AUG 16.87 12.4 VET AUG 20.1118 12.4 SXN AUG 16.877 13.0 RMQ AUG 20.8368 12.1 DPV AUG 17.0778 12.1 BRJ AUG 20.875 11.9 RMQ AUG 17.0798 12.3 DPL AUG 21.0521 11.7 MKJ AUG 17.1097 12.5 SXN AUG 21.0667 11.9 BRJ AUG 17.851 12.3 MUY AUG 21.0681 12.6 CGF AUG 17.878 12.7 RMQ AUG 21.1118 12.4 SXN AUG 18.0812 11.9 DPL AUG 21.1125 12.1 DPL ---------------------------------------------------------------------------- 1807-27 V1830 SAGITTARII The dwarf nova type cataclysmic variable V1830 SGR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 07.46 <14.0 WPX AUG 20.439 12.4 SRX AUG 16.391 <12.8 SRX AUG 21.438 12.4 SRX AUG 17.397 12.6 SRX AUG 21.4548 12.2 WPX ---------------------------------------------------------------------------- 1848+26 CY LYRAE The dwarf nova type cataclysmic variable CY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 20.2220 16.13 CCDV ZRE AUG 21.0701 13.1 CGF AUG 20.86 13.4 GUN AUG 21.0715 13.4 BRJ AUG 20.871 13.6 RMQ AUG 21.0910 13.1 MKJ AUG 21.017 13.5 PYG AUG 21.1549 13.5 SXN ---------------------------------------------------------------------------- 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 AUG 18.981 14.3: RMQ AUG 20.992 13.2 PYG AUG 19.986 14.1 RMQ AUG 21.0639 13.0 CGF AUG 20.2660 13.4 CCDV ZRE AUG 21.0854 12.7 BRJ AUG 20.877 12.6 RMQ ---------------------------------------------------------------------------- 2026-45 TU INDI The dwarf nova type cataclysmic variable TU IND is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 20.423 <14.8 SRX AUG 21.4861 14.3 WPX AUG 21.427 14.0 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA PYG - G. POYNER, ENGLAND CGF - G. CHAPLE JR., USA RMQ - M. RESZELSKI, POLAND DPL - P. DOMBROWSKI, USA SRX - R. STUBBINGS, AUSTRALIA DPV - P. DUBOVSKY, SLOVAKIA SXN - M. SIMONSEN, USA GUN - J. GUNTHER, FRANCE VET - M. VERDENET, FRANCE MKJ - J. MCKENNA, USA WPX - P. WILLIAMS, NEW ZEALAND MUY - E. MUYLLAERT, BELGIUM 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 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! ____________________________________________________________________________