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: Z Cam, DM Lyr, CY UMa No. 269 March 10, 1998 ________________________________________________________________________________ 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 MAR 05.08 13.0 GRL MAR 08.09 11.7 GRL MAR 06.8 12.1 VET MAR 08.4514 11.9 HSG MAR 07.18 12.3 GRL MAR 10.5167 11.0 HSG ----------------------------------------------------------------------------- DM LYRAE The dwarf nova type cataclysmic variable DM Lyr appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 08.4681 <15.4 HSG MAR 10.5319 14.8 HSG According to the AAVSO International Database this star is fainter than visual magnitude 18 during quiescence. ----------------------------------------------------------------------------- CY URSAE MAJORIS The dwarf nova type (SU UMa subclass) cataclysmic variable CY UMa is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 08.4569 <15.6 HSG MAR 09.832 12.7 SPK MAR 09.18 <13.6 SPK MAR 10.5090 12.9 HSG ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: GRL - B. Granslo, Norway HSG - G. Hanson, USA SPK - P. Schmeer, Germany VET - M. Verdenet, France 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 ________________________________________________________________________________ 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! ______________________________________________________________________________