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: 1848-19 FN SGR 2158+41 BL LAC No. 470 2043+41 V516 CYG July 21, 1999 ---------------------------------------------------------------------------- 1848-19 FN SAGITTARII The symbiotic variable FN SGR appears to be fading, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 07.254 12.4 OCN JUL 11.289 12.9 MRV JUL 07.8 13.0 OB JUL 12.15 12.8 BRJ JUL 08.16 12.8 BRJ JUL 12.308 13.1 MRV JUL 08.285 12.7 MRV JUL 12.76 13.0 MLF JUL 08.7 13.2 OB JUL 13.281 13.1 MRV JUL 08.77 12.5 MLF JUL 17.80 13.4 MLF JUL 11.017 12.5: MUY JUL 21.14 14.0 BRJ ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 16.3080 16.76 CCDV ZRE JUL 20.0910 13.6 POX JUL 17.035 <15.5 PYG JUL 21.1215 13.7 BRJ JUL 17.0389 14.0 POX JUL 21.2920 13.52 CCDV ZRE ---------------------------------------------------------------------------- 2158+41 BL LACERTAE BL LAC (the prototype of BL LAC-type objects) may be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 17.044 14.8 PYG JUL 18.4319 13.7 CCDV COO JUL 17.94 13.6 VET JUL 20.9729 13.6 JCN JUL 18.0368 13.8 JCN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA OB - M. OVERBEEK, SOUTH AFRICA COO - L. COOK, USA OCN - S. O'CONNOR, CANADA JCN - C. JONES, ENGLAND POX - M. POXON, ENGLAND MLF - L. MONARD, SOUTH AFRICA PYG - G. POYNER, ENGLAND MRV - R. MODIC, USA VET - M. VERDENET, FRANCE MUY - E. MUYLLAERT, BELGIUM 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! ____________________________________________________________________________