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: MICROLENSING EVENT 0744-23 BV PUP No. 308 0324+58 AF CAM 1004-69 OY CAR June 5, 1998 ---------------------------------------------------------------------------- MICROLENSING EVENT We have been informed by G. Wallerstein of the detection (by the OGLE-2 Early Warning System) of a very bright microlensing event, which is increasing in amplitude, at the following (2000) coordinates: RA = 17:54:21.79 Dec = -29:53:24.0 Further information including a finder chart and a light curve can be found at the following web address: http://www.astrouw.edu.pl/~ftp/ogle/ogle2/ews/bul-18.html ----------------------------------------------------------------------------- 0324+58 AF CAMELOPARDALIS The dwarf nova type cataclysmic variable AF CAM appears to be undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 16.1486 <14.6 HSG JUN 04.4431 12.9 HSG MAY 28.4472 <14.1 HSG JUN 05.4382 13.3 HSG JUN 03.4069 13.5 HSG ---------------------------------------------------------------------------- 0744-23 BV PUPPIS The dwarf nova type (SS CYG subclass) cataclysmic variable BV PUP appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 29.3576 <14.1 SRX JUN 03.3660 13.2 SRX JUN 02.3590 13.3 SRX JUN 05.3618 13.0 SRX ---------------------------------------------------------------------------- 1004-69 OY CARINAE The dwarf nova type (SU UMA subclass) cataclysmic variable OY CAR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 23.437 <14.5 WPX JUN 05.4910 13.2 SRX JUN 03.3764 <14.0 SRX JUN 05.4917 13.2 SRX JUN 04.7681 <13.2 SRX JUN 05.4924 13.0 SRX JUN 05.3806 13.2 SRX JUN 05.4931 12.9 SRX JUN 05.4007 13.2 SRX JUN 05.4938 12.7 SRX JUN 05.4826 12.4 SRX JUN 05.4944 12.5 SRX JUN 05.4889 12.4 SRX JUN 05.4951 12.4 SRX JUN 05.4896 13.2 SRX JUN 05.4958 12.4 SRX JUN 05.4903 13.2 SRX JUN 05.4965 12.4 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: HSG - G. HANSON, USA SRX - R. STUBBINGS, AUSTRALIA OB - M. OVERBEEK, SOUTH AFRICA WPX - P. WILLIAMS, NEW ZEALAND 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! ___________________________________________________________________________