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: TT Boo, V516 Cyg, V811 Cyg, X Leo, No. 32 CY Lyr, FO Aql, R CrB, CH Cyg, IP Peg June 24, 1996 ________________________________________________________________________________ TT BOOTIS The dwarf nova type (SU UMa subclass) cataclysmic variable TT Boo is in outburst as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 22.2035 <14.8 HSG JUN 24.1007 13.7 BRJ JUN 22.2549 13.0 SQN JUN 24.1417 13.7 GRI JUN 24.1153 13.3 MKJ ----------------------------------------------------------------------------- V516 CYGNI The dwarf nova type (SS Cyg subclass) cataclysmic variable V516 Cyg is in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 22.2674 13.8 BTH JUN 23.2951 14.0 SWT JUN 24.1847 13.6 SWT ----------------------------------------------------------------------------- V811 CYGNI The dwarf nova type (SS Cyg subclass) cataclysmic variable V811 Cyg is in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 23.2924 14.7: SWT JUN 24.1715 14.3 SWT JUN 24.2722 14.1 GRI ----------------------------------------------------------------------------- X LEONIS The dwarf nova type (SS Cyg subclass) cataclysmic variable X Leo appears to be in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 20.1681 <13.5 HSG JUN 22.1687 12.2 HSG ----------------------------------------------------------------------------- CY LYRAE The dwarf nova type (SS Cyg subclass) cataclysmic variable CY Lyr is in outburst as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 22.2507 <14.4 HSG JUN 24.1229 13.5 SWT JUN 23.85 13.4 SCZ JUN 24.2153 13.2 GRI JUN 24.1139 13.6 BRJ ----------------------------------------------------------------------------- FO AQUILAE The dwarf nova type (SS Cyg subclass) cataclysmic variable continues in outburst (see News Flash No. 31) is indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 20.2847 14.1 HSG JUN 24.1868 13.3 SWT JUN 22.2854 14.1 HSG JUN 24.2347 13.3 GRI JUN 23.3146 13.4 SWT ----------------------------------------------------------------------------- R CORONAE BOREALIS R CrB (prototype of its class) continues to brighten slowly from its current decline. It has brightened about two magnitudes since May 6th when it was at about magnitude 10.3 (see News Flash No.17). Below are recent observations on it. AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 10.0840 8.7 BMM JUN 15.2174 8.8 HSG JUN 10.1438 8.3 DLA JUN 15.88 8.0 SCZ JUN 10.1688 8.5 DIL JUN 15.9333 8.5 BMM JUN 10.88 8.5 ZAM JUN 15.936 8.4 DPA JUN 11.0660 8.7 BMM JUN 16.12 8.8 PAE JUN 11.1146 8.5 DIL JUN 16.1917 8.5 DIL JUN 11.179 8.6 OCN JUN 16.2257 8.5 KB JUN 11.2326 8.8 HSG JUN 16.2792 8.7 HSG JUN 11.2458 8.4 BTH JUN 16.9486 8.5 BMM JUN 12.85 8.7 VET JUN 17.1340 8.5 DIL JUN 12.9229 8.6 BMM JUN 17.85 7.6 ZAM JUN 13.2194 8.5 RR JUN 17.9979 8.5 BMM JUN 13.8 8.2 SCZ JUN 18.914 8.4 DPA JUN 13.909 8.5 BMM JUN 19.09 8.4 PAE JUN 14.8958 8.5 BMM JUN 20.1146 7.8 SET JUN 14.913 8.3 SKP JUN 20.2431 8.3 BTH JUN 14.981 8.5 DPA JUN 20.2917 8.5 HSG JUN 15.0847 8.3 SET JUN 22.2694 8.5 HSG JUN 15.1139 8.5 BRJ JUN 23.3118 8.4 RTY JUN 15.175 8.4 MKJ JUN 23.88 8.2 ZAM JUN 15.2132 8.7 RTY ----------------------------------------------------------------------------- CH CYGNI The Z And type cataclysmic variable CH Cyg continues to be very faint (see News Flash No. 28 & 31) as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 20.2958 10.4: HSG JUN 22.2722 10.4 HSG ----------------------------------------------------------------------------- IP PEGASI The present outburst (see News Flash No.31) of the dwarf nova type (SU UMa subclass) cataclysmic variable IP Peg appears to be a superoutburst as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 20.3069 13.5: HSG JUN 23.3194 13.6 SWT JUN 20.3674 12.0 DLA JUN 24.05 12.3 SCZ JUN 22.2986 12.6 HSG ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. Biesmans, Belgium PAE - A. Pereira, Portugal BRJ - J. Bortle, USA RR - R. Royer, USA BTH - T. Burrows, USA RTY - T. Rogers, USA DIL - W. Dillon, USA SCZ - E. Schweitzer, France DLA - A. Dill, USA SET - C. Stephan, USA DPA - A. Diepvens, Belgium SKP - P. Skalak, Czech Republic GRI - J. Griese, USA SQN - L. Shaw, USA HSG - G. Hanson, USA SWT - R. Stewart, USA KB - W. Kaminski, USA VET - M. Verdenet, France MKJ - J. McKenna, USA ZAM - M. Zanotta, Italy OCN - S. O'Connor, Canada Please monitor these stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Janet A. Mattei Note of thanks: I would like to express my sincere thanks to my technical assistant Rebecca Pellock who kept publishing the AAVSO News Flashes and all the observers who contributed observations to them while I was away attending the IAU Symposium 177 on Carbon Star Phenomenon in Turkey and visiting my family there. The scientific program of the Symposium covering all aspects of carbon stars was excellent. The AAVSO was well represented there with one invited and two contributed papers and many references to the AAVSO data. - JAM ________________________________________________________________________________ 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! ________________________________________________________________________________