THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 http://www.aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0814+73 Z CAM 1953+77 AB DRA No. 461 1640+25 AH HER 2244-27 TY PSA July 6, 1999 1807-27 V1830 SGR ---------------------------------------------------------------------------- 0814+73 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 JUL 02.917 13.1 MUY JUL 04.9180 10.9 SJZ JUL 03.2229 11.8 BTH JUL 04.941 11.0 PYG JUL 03.9110 12.4 SJZ JUL 05.2160 10.8 BTH JUL 03.927 12.9 RMQ JUL 05.923 10.3 DPV JUL 04.2188 10.8 BTH JUL 05.9240 10.4 SJZ JUL 04.902 10.7 DPV ---------------------------------------------------------------------------- 1640+25 AH HERCULIS The dwarf nova type (Z CAM subclass) cataclysmic variable AH HER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 03.932 <13.6 MUY JUL 04.967 13.0 PYG JUL 03.94 14.4 PUJ JUL 05.2292 13.0 SXN JUL 03.960 <13.5 RMQ JUL 05.2451 12.4 BTH JUL 04.2403 12.6 BTH JUL 05.927 12.9 DPV JUL 04.944 13.0 DPV ---------------------------------------------------------------------------- 1807-27 V1830 SAGITTARII The dwarf nova type cataclysmic variable V1830 SGR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 03.4354 14.0 WPX JUL 04.3902 12.5 WPX JUL 03.869 12.0 OB JUL 05.4410 12.2 SRX JUL 04.3785 12.0 SRX ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 04.981 14.7 PYG JUL 05.9236 13.9 JCN JUL 05.2708 12.7 BTH ---------------------------------------------------------------------------- 2244-27 TY PISCIS AUSTRINI The dwarf nova type (SU UMA subclass) cataclysmic variable TY PSA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUN 18.10 <14.2 MLF JUL 05.5479 12.5 SRX JUL 04.5528 <13.1 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BTH - T. BURROWS, USA PYG - G. POYNER, ENGLAND DPV - P. DUBOVSKY, SLOVAKIA RMQ - M. RESZELSKI, POLAND JCN - C. JONES, ENGLAND SJZ - J. SPEIL, POLAND MLF - L. MONARD, SOUTH AFRICA SRX - R. STUBBINGS, AUSTRALIA MUY - E. MUYLLAERT, BELGIUM SXN - M. SIMONSEN, USA OB - M. OVERBEEK, SOUTH AFRICA WPX - P. WILLIAMS, NEW ZEALAND PUJ - F. PUJOL, SPAIN 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 visiting the following web page: http://www.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 An archive of past issues of the News Flash is available at the following web page: http://www.aavso.org/newsflash/ We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________