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: SS Cyg, FG Sge, AB Dra, SU UMa No. 33 June 27, 1996 ________________________________________________________________________________ SS CYGNI The dwarf nova type (SS Cyg subclass prototype) cataclysmic variable is in outburst as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 25.0001 12.1 PYG JUN 26.1986 9.5 SWT JUN 25.073 12.2 SPK JUN 26.2042 8.6 RTY JUN 25.2042 11.9 HSG JUN 26.2778 9.0 SCE JUN 25.961 10.6 SPK JUN 26.2833 9.1 BTH JUN 25.9792 10.0 BMM JUN 26.288 9.1 CCDV ZRE JUN 25.988 10.1 GMC JUN 26.3299 9.0 HAB JUN 26.0174 10.2 PYG JUN 26.3507 8.6 SQN JUN 26.073 10.1 SPK JUN 26.60 9.3 DGP JUN 26.0965 10.0 RTY JUN 27.0160 8.4 BMM JUN 26.1201 9.4 RTY JUN 27.1271 8.4 HAV JUN 26.1347 9.3 RTY JUN 27.1375 8.6 BRJ JUN 26.1347 9.8 HAB JUN 27.1743 8.7 DIL JUN 26.1514 9.1 RTY JUN 27.1910 8.5 BTB JUN 26.1646 9.0 RTY JUN 27.2014 8.5 SWT JUN 26.1736 9.6 BRJ JUN 27.2062 8.4 RTY JUN 26.1806 9.7 BTB JUN 27.4160 8.2 SLZ This star is scheduled to be observed with several satellites during its next long outburst (see AAVSO Alert Notices 221 and 222). Analyzing the AAVSO data going back to 1987, we have predicted the current outburst to be a narrow one. Please monitor SS Cyg closely and send in your observations daily (until the end of the outburst) so that we can confirm the duration of the current outburst. ----------------------------------------------------------------------------- FG SAGITTAE FG Sge, the central star of a planetary nebula, appears to be recovering slowly from its earlier dramatic fading (see News Flash No. 18, AAVSO Alert Notice 221). The following observations show this brightening trend over the past month: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 26.200 16.10CCDV ZRE JUN 12.97 <15.0 VET MAY 31.289 15.51CCDV ZRE JUN 15.261 15.37CCDV ZRE JUN 3.4792 16.5 CCDV RR JUN 18.4063 15.0 CCDV RR JUN 6.240 15.59CCDV ZRE JUN 26.1694 <14.5 BRJ JUN 7.97 <15.0 VET JUN 26.250 14.74CCDV ZRE JUN 9.1688 <14.5 HAV ----------------------------------------------------------------------------- AB DRACONIS The dwarf nova type (Z Cam subclass) cataclysmic variable is in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 26.278 13.8 CCDV ZRE JUN 27.1368 13.0 BRJ JUN 27.1882 12.9 SWT ----------------------------------------------------------------------------- SU URSAE MAJORIS The dwarf nova type (SU UMa subclass prototype) cataclysmic variable SU UMa appears to be in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 22.1792 <14.0 HSG JUN 27.1132 12.3 BRJ ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. Biesmans, Belgium PYG - G. Poyner, England BRJ - J. Bortle, USA RR - R. Royer, USA BTB - T. Bretl, USA RTY - T. Rogers, USA BTH - T. Burrows, USA SCE - C. Scovil, USA GMC - M. Gill, England SLZ - G. Schott, Germany DGP - G. Dyck, USA SPK - P. Schmeer, Germany DIL - W. Dillon, USA SQN - L. Shaw, USA HAB - R. Hays, USA SWT - R. Stewart, USA HAV - R. Harvan, USA VET - M. Verdenet, France HSG - G. Hanson, USA ZRE - R. Zissell, USA Please monitor these and other 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! ________________________________________________________________________________