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: CY UMa, Z Cam, EM Cyg, No. 30 V516 Cyg, AY Lyr June 10, 1996 ________________________________________________________________________________ CY URSAE MAJORIS The dwarf nova type (SU UMa subclass) cataclysmic variable CY UMa appears to be in outburst as indicated by the following observations: AAVSO Observer UT Mag. Initials JUN 8.1882 <14.7 HSG JUN 8.2764 <14.4 BTH JUN 10.2215 13.6 BTH ----------------------------------------------------------------------------- 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 JUN 7.976 12.0 DPA JUN 9.2111 10.9 BTH JUN 8.3306 11.7 HSG JUN 9.2444 10.9 SQN JUN 8.9306 11.0 PYG JUN 9.9563 10.5 BMM JUN 9.0931 11.2 HAV JUN 10.2063 10.8 BTH ----------------------------------------------------------------------------- EM CYGNI The dwarf nova type (Z Cam subclass) cataclysmic variable EM Cyg is in outburst as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 6.0660 13.9 BMM JUN 8.0813 13.3 BMM JUN 6.956 13.9 DPA JUN 9.2139 13.1 MKJ JUN 7.191 13.9 CCDV ZRE JUN 10.0736 12.6 BMM JUN 7.94 12.9 VET ----------------------------------------------------------------------------- V516 CYGNI The dwarf nova type (SS Cyg subclass) cataclysmic variable V516 Cyg appears to be in outburst as indicated by the following observation: AAVSO Observer UT Mag. Initials JUN 9.011 14.1 PYG ----------------------------------------------------------------------------- AY LYRAE The dwarf nova type (SU UMa subclass) cataclysmic variable AY Lyr had a short outburst over the weekend (June 7-9) as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 6.161 18.68 CCDV ZRE JUN 8.2736 13.3 HSG JUN 6.949 <13.9 DPA JUN 8.3035 13.1 BTH JUN 7.2556 <14.2 BTH JUN 8.3389 13.3 HSG JUN 7.93 13.6 VET JUN 9.1625 13.7 GRI JUN 7.972 13.2 DPA JUN 9.2028 13.9 MKJ JUN 7.9979 13.2 BMM JUN 9.9972 14.9 BMM JUN 8.1986 13.4 HSG JUN 10.2472 <14.2 BTH JUN 8.2674 13.4 KB JUN 10.3681 <14.2 KB ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. Biesmans, Belgium KB - W. Kaminski, USA BTH - T. Burrows, USA MKJ - J. McKenna, USA DPA - A. Diepvens, Belgium PYG - G. Poyner, England GRI - J. Griese, USA SQN - L. Shaw, USA HAV - R. Harvan, USA VET - M. Verdenet, France HSG - G. Hanson, USA ZRE - R. Zissell, USA Please monitor these stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Rebecca Pellock, Technical Assistant in the absence 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 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! ________________________________________________________________________________