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: 0006-12 WW CET 0214-03 OMI CET No. 476 0043+56B GX CAS 1544+28A R CRB August 3, 1999 0106+34 FN AND 1911-00 FO AQL ---------------------------------------------------------------------------- 0006-12 WW CETI The dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 26.8215 14.0 SRX AUG 03.5486 10.4 SRX ---------------------------------------------------------------------------- 0043+56B GX CASSIOPEIAE The dwarf nova type (SU UMA subclass) cataclysmic variable GX CAS appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 31.94 <14.5 KTO AUG 02.047 <14.1 PYG AUG 01.92 <14.1 KTO AUG 02.3278 13.4 SXN ---------------------------------------------------------------------------- 0106+34 FN ANDROMEDAE The dwarf nova type cataclysmic variable FN AND may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 24.060 <15.5 PYG JUL 31.049 <14.7 PYG JUL 25.3333 <13.7 SXN AUG 02.064 <14.7 PYG JUL 29.101 <14.7 PYG AUG 02.2562 13.6: SXN ---------------------------------------------------------------------------- 0214-03 OMICRON CETI The astronomers at the Harvard-Smithsonian Center for Astrophysics are currently observing the prototype mira variable, omicron Ceti (Mira), with the Hubble Space Telescope (HST). They have requested that our observers keep a close eye on this star throughout the month of August to ensure that we have very thorough coverage in the visual light curve for correlation of their HST data. Mira is just coming out of its observing gap and rising from its minimum of last month. It is not necessary to report these observations on a nightly basis - please include them in your regular monthly report. Thank you for your help with this observing run. ---------------------------------------------------------------------------- 1544+28A R CORONAE BOREALIS R CrB, the prototype R CrB type variable, appears to be fading slightly, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 18.2292 6.1 SXN JUL 28.933 6.6 PYG JUL 18.971 6.1 RMQ JUL 28.944 6.5 RMQ JUL 19.3300 6.2 MZX JUL 29.0780 6.3 WEF JUL 19.946 6.1 RMQ JUL 29.3763 6.4 WPX JUL 20.915 6.0 MUY JUL 29.9 6.7 VET JUL 20.969 6.1 RMQ JUL 30.0710 6.2 WEF JUL 21.950 6.1 RMQ JUL 30.1965 6.3 DIL JUL 22.2069 6.2 DIL JUL 30.923 6.4 TUB JUL 22.4083 6.2 WPX JUL 30.948 6.8 PYG JUL 22.928 6.2 RMQ JUL 31.0710 6.6 WEF JUL 22.970 6.3 PYG JUL 31.0833 6.6 KMA JUL 23.1292 6.2 SXN JUL 31.1319 6.7 DIL JUL 23.1896 6.1 DIL JUL 31.1972 6.8 SXN JUL 23.943 6.4 PYG JUL 31.3694 6.7 WPX JUL 23.971 6.1 RMQ JUL 31.88 6.7 VET JUL 24.0940 6.2 WEF AUG 01.1285 6.3 DIL JUL 24.3652 6.1 WPX AUG 01.875 6.4 TUB JUL 25.1875 6.3 SXN AUG 01.88 6.7 VET JUL 26.0979 6.6 KMA AUG 01.899 6.8 MUY JUL 26.0990 6.2 WEF AUG 01.931 7.0 PYG JUL 26.899 6.2 MUY AUG 02.0708 6.6 KMA JUL 27.0810 6.2 WEF AUG 02.1060 6.7 WEF JUL 27.913 6.4 MUY AUG 02.12 6.7 BRJ JUL 27.939 6.7 PYG AUG 02.1292 6.8 SXN JUL 28.0830 6.3 WEF AUG 03.0670 6.9 WEF JUL 28.09 6.4 BRJ AUG 03.09 7.0 BRJ JUL 28.1660 6.3 DIL AUG 03.1667 6.9 SXN JUL 28.190 6.3 MRV AUG 03.3000 6.7 AAP ---------------------------------------------------------------------------- 1911-00 FO AQUILAE The dwarf nova type (SS CYG subclass) cataclysmic variable FO AQL is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 21.2320 15.68 CCDV ZRE AUG 01.915 14.1: MUY JUL 22.977 <15.2 PYG AUG 01.940 14.2: PYG JUL 24.035 <15.2 PYG AUG 02.1014 13.6 BRJ JUL 28.957 <14.3 PYG AUG 02.1014 14.0 MKJ JUL 30.957 <14.3 PYG AUG 03.0806 14.4 BRJ AUG 01.4097 14.0 SRX AUG 03.4208 14.4 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: AAP - A. ABBOTT, CANADA PYG - G. POYNER, ENGLAND BRJ - J. BORTLE, USA RMQ - M. RESZELSKI, POLAND DIL - W. DILLON, USA SRX - R. STUBBINGS, AUSTRALIA KMA - M. KOMOROUS, CANADA SXN - M. SIMONSEN, USA KTO - T. KINNUNEN, FINLAND TUB - V. TUBOLY, HUNGARY MKJ - J. MCKENNA, USA VET - M. VERDENET, FRANCE MRV - R. MODIC, USA WEF - F. WEST, USA MUY - E. MUYLLAERT, BELGIUM WPX - P. WILLIAMS, NEW ZEALAND MZX - A. MENZL, USA 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! Janet A. Mattei, Director Rebecca Pellock, Technical Assistant ____________________________________________________________________________ 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! ____________________________________________________________________________