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: 1803+05 V426 OPH 1951-09 UU AQL No. 478 1834-23 V348 SGR 1953+77 AB DRA August 5, 1999 1841+37 AY LYR 2053+25 VW VUL ---------------------------------------------------------------------------- 1803+05 V426 OPHIUCHI The dwarf nova type (possible Z Cam subclass) cataclysmic variable V426 OPH is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 28.248 12.7 OCN AUG 03.934 12.0 DPV JUL 31.203 12.5 OCN AUG 04.1188 12.0 BRJ AUG 02.0979 12.4 BRJ AUG 04.1188 12.0 BRJ AUG 02.235 12.2 OCN AUG 04.902 11.7 DPV AUG 03.0799 11.9 BRJ AUG 05.0924 11.2 BRJ ---------------------------------------------------------------------------- 1834-23 V348 SAGITTARII We have been informed by A. U. Landolt, Louisiana State University, A. K. Uomoto, Johns Hopkins University, and IAU Circular No. 7231 of the possible brightening of V348 Sgr. Landolt and Uomoto, observing at the Las Campanas Observatory, reported the following CCDV observations: UT CCDV MAG JUL 31.18 18.10 AUG 01.15 18.18 AUG 02.18 18.05 AUG 03.19 17.63 AUG 04.19 17.66 Their data indicate that V348 Sgr may have begun a recovery from its most recent minimum that began in late March 1999. ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 04.1920 17.75 CCDV ZRE AUG 05.1972 13.6 SXN AUG 04.89 <14.2 KTO ---------------------------------------------------------------------------- 1951-09 UU AQUILAE The dwarf nova type cataclysmic variable UU AQL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 03.2020 14.92 CCDV ZRE AUG 05.1636 <13.1 BEB AUG 03.928 <13.9 MUY AUG 05.2090 13.9 SXN ---------------------------------------------------------------------------- 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 AUG 03.0913 14.9 BRJ AUG 04.875 13.7 DPV AUG 03.904 <14.0 MUY AUG 04.90 13.8 KTO AUG 04.1063 14.5 BRJ AUG 05.1104 13.8 BRJ ---------------------------------------------------------------------------- 2053+25 VW VULPECULAE The dwarf nova type (SU UMA subclass) cataclysmic variable VW VUL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 23.020 15.4 PYG AUG 01.981 <14.5 PYG JUL 29.015 <14.5 PYG AUG 04.950 14.0 KTO JUL 31.95 <14.5 KTO ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA OCN - S. O'CONNOR, CANADA BRJ - J. BORTLE, USA PYG - G. POYNER, ENGLAND DPV - P. DUBOVSKY, SLOVAKIA SXN - M. SIMONSEN, USA KTO - T. KINNUNEN, FINLAND ZRE - R. ZISSELL, USA MUY - E. MUYLLAERT, BELGIUM 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! ____________________________________________________________________________