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: 2023+43 V503 CYG 2318+17 IP PEG No. 477 2043+41 V516 CYG August 4, 1999 ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 03.09 <15.1 BRJ AUG 04.1333 14.6 MKJ AUG 04.1028 14.8 BRJ AUG 04.2450 14.96 CCDV ZRE According to the AAVSO International Database this star is fainter than visual magnitude 16.0 during quiescence. ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 03.09 <15.2 BRJ AUG 04.1299 <14.2 MKJ AUG 04.1035 15.2 BRJ AUG 04.2630 14.98 CCDV ZRE According to the AAVSO International Database this star is fainter than visual magnitude 15.5 during quiescence. ---------------------------------------------------------------------------- 2318+17 IP PEGASI The dwarf nova type cataclysmic variable IP PEG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 02.045 <14.1 PYG AUG 04.1097 12.5 DPL AUG 02.940 <12.9 MUY AUG 04.1368 12.1 MKJ ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA MUY - E. MUYLLAERT, BELGIUM DPL - P. DOMBROWSKI, USA PYG - G. POYNER, ENGLAND MKJ - J. MCKENNA, USA ZRE - R. ZISSELL, USA 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, Director Rebecca Pellock, Technical Assistant ____________________________________________________________________________ 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! ____________________________________________________________________________