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 1925+42 V1504 CYG No. 1037 0528-46 UW PIC 1927+33 V792 CYG September 25, 2002 0217+70 AM CAS 1951-09 UU AQL 0401+50 FO PER 2335+12 HX PEG 1552+72 SS UMI ---------------------------------------------------------------------------- 0006-12 WW CETI Please continue to keep a very close eye on the dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET in order to continue to provide vital optical observations to Dr. Baskill for his daily RXTE x-ray observations. For more information, including information on recommended frequency of observations and RXTE observing timetables, please visit the AAVSO webpage that we've set up for this campaign which has links to Dr. Baskill's website with further information: http://www.aavso.org/wwcet.shtml ---------------------------------------------------------------------------- 0528-46 UW PICTORIS AAVSO observer, Berto Monard reports that the AM HER star UW Pic appears to be both in a state of elevated brightness and experiencing substantial oscillations. He reports that observations obtained the night of Sep 24-25 show oscillations of 1.3 magnitudes with a frequency of 0.0425 days. ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 18.1000 <14.2 CGF SEP 23.8854 13.3 OJR SEP 20.0000 <13.5 CGF SEP 24.8250 13.3 OJR SEP 23.0250 14.0 CGF SEP 25.0264 14.0 CGF ---------------------------------------------------------------------------- 0401+50 FO PERSEI The dwarf nova type cataclysmic variable FO PER appears to be in outburst, as indicated by the following observation: AAVSO Observer UT Mag. Initials SEP 25.2306 13.2 SXN ---------------------------------------------------------------------------- 1552+72 SS URSAE MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SS UMI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 23.8650 <15.4 PYG SEP 25.0083 14.6 CGF SEP 23.9854 15.2 TDB SEP 25.0625 <14.2 SXN SEP 24.9819 14.5 TDB ---------------------------------------------------------------------------- 1925+42 V1504 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V1504 CYG appears to be going into outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 22.2361 <15.4 LMK SEP 24.2806 <14.5 LMK SEP 22.8990 <15.3 PYG SEP 24.8299 <14.3 OJR SEP 23.0000 <14.5 CGF SEP 25.0000 <14.5 CGF SEP 23.9100 15.4 PYG SEP 25.1424 <14.7 SXN ---------------------------------------------------------------------------- 1927+33 V792 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V792 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 17.2035 <14.5 SXN SEP 25.1347 13.9 SXN ---------------------------------------------------------------------------- 1951-09 UU AQUILAE The dwarf nova type cataclysmic variable UU AQL is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 24.1910 15.47 CCDV GKA SEP 25.1132 11.6 SXN SEP 24.3160 <14.7 LMK SEP 25.1889 11.9 LAI SEP 24.4063 <13.9 LAI SEP 25.2882 11.5 LMK SEP 24.9063 12.1 OJR ---------------------------------------------------------------------------- 2335+12 HX PEGASI The dwarf nova type cataclysmic variable HX PEG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 17.8482 15.05 CCD DRG SEP 24.0451 12.7 TDB SEP 22.9880 <13.9 PYG SEP 24.3424 12.6 LMK SEP 23.2007 <13.0 LAI SEP 24.4264 <12.5 LAI SEP 23.9630 13.8 PYG SEP 25.2035 13.0 SXN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. CHAPLE JR., USA OJR - J. OSORIO, SPAIN DRG - R. DIETHELM, SWITZERLAND PYG - G. POYNER, ENGLAND GKA - K. GRAHAM, USA SXN - M. SIMONSEN, USA LAI - A. LING, CANADA TDB - D. TAYLOR, CANADA LMK - M. LINNOLT, 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! ____________________________________________________________________________