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: 0058+40 RX AND 1813+49 AM HER No. 311 1326-29 LY HYA 1830-37 BP CRA June 18, 1998 1612-54 HP NOR 1953+77 AB DRA 1719-35 V478 SCO 2043+41 V516 CYG ---------------------------------------------------------------------------- 0058+40 RX ANDROMEDAE The dwarf nova type (Z CAM subclass) cataclysmic variable RX AND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 08.339 14.0 MRV JUN 17.033 11.4 PYG JUN 12.052 13.9: PYG ---------------------------------------------------------------------------- 1326-29 LY HYDRAE The dwarf nova type cataclysmic variable LY HYA may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 17.5042 <15.0 SRX JUN 18.5847 15.0 SRX JUN 18.5556 15.0 SRX According to the 71st Name List (IBVS No. 3840), LY Hya is 18th magnitude V at minimum. ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 15.4382 <14.4 SRX JUN 18.469 14.5 WPX JUN 16.492 <14.5 WPX JUN 18.5271 14.0 SRX JUN 17.4736 <14.5 SRX JUN 18.6667 13.5 SRX ---------------------------------------------------------------------------- 1719-35 V478 SCORPII The dwarf nova type cataclysmic variable V478 SCO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 16.468 <14.5 WPX JUN 18.5375 14.4 SRX JUN 17.4792 <15.0 SRX JUN 18.6674 14.4 SRX JUN 18.444 14.2 WPX According to the General Catalogue of Variable Stars, V478 Sco is 16th magnitude B at minimum. ---------------------------------------------------------------------------- 1813+49 AM HERCULIS The magnetic variable AM HER may be brightening from its faint state, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 05.1500 14.7 CCDV ZRE JUN 16.970 <14.0: PYG JUN 05.3889 <14.0 SQN JUN 17.2806 13.8 SQN JUN 05.3986 14.5 HSG JUN 18.1819 13.8 KMA JUN 06.3979 14.5 HSG JUN 18.2882 13.9 SQN JUN 11.985 <14.0 PYG ---------------------------------------------------------------------------- 1830-37 BP CORONAE AUSTRINAE The dwarf nova type (Z CAM subclass) cataclysmic variable BP CRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 15.4521 <14.4 SRX JUN 17.4847 13.8 SRX JUN 16.4333 14.4 SRX JUN 18.454 14.2 WPX JUN 16.476 14.3 WPX JUN 18.5333 13.8 SRX ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 11.991 <13.7 PYG JUN 16.979 13.0 PYG JUN 12.9979 13.8 BMM ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 12.017 <14.2 PYG JUN 17.001 14.1 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. BIESMANS, BELGIUM SQN - L. SHAW, USA HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA KMA - M. KOMOROUS, CANADA WPX - P. WILLIAMS, AUSTRALIA MRV - R. MODIC, USA ZRE - R. ZISSELL, USA PYG - G. POYNER, ENGLAND Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Elizabeth O. Waagen, Senior 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! ____________________________________________________________________________