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, VW Hyi, WX Hyi, BR Lup, TZ Per No. 291 April 27, 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 APR 24.4021 12.8 HSG APR 25.906 10.9 PYG APR 25.2076 10.9 KMA APR 26.944 10.9 PYG APR 25.3903 11.0 HSG APR 27.4076 10.6 BEB ----------------------------------------------------------------------------- VW HYDRI The dwarf nova type (SU UMa subclass) cataclysmic variable VW Hyi is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 19.70 13.6 MLF APR 27.707 9.6 OB APR 23.7 <12.9 OB APR 27.741 9.6 OB APR 26.4583 10.2 TJN ----------------------------------------------------------------------------- WX HYDRI The dwarf nova type (SU UMa subclass) cataclysmic variable WX Hyi is in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 20.4090 14.5 SRX APR 26.4583 12.5 TJN APR 26.825 12.7 HJN ----------------------------------------------------------------------------- BR LUPI The dwarf nova type (SU UMa subclass) cataclysmic variable BR Lup is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 22.4264 15.1 SRX APR 25.5576 13.8 SRX APR 23.6035 <14.7 SRX APR 26.814 13.9 MLF APR 25.4208 13.8 SRX APR 26.853 14.0 HJN ----------------------------------------------------------------------------- TZ PERSEI The dwarf nova type (Z Cam subclass) cataclysmic variable TZ Per appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 21.1757 <14.0 HSG APR 27.134 13.2 PYG ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. Berg, USA OB - D. Overbeek, South Africa HJN - J. Hers, South Africa PYG - G. Poyner, England HSG - G. Hanson, USA SRX - R. Stubbings, Australia KMA - M. A. Komorous, Canada TJN - J. Tilbrook, Australia MLF - B. Monard, South Africa Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Rebecca Pellock, Technical Assistant on behalf 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! ____________________________________________________________________________