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: 0006-12 WW CET 1804+67 EX DRA No. 545 0401+50 FO PER 1918+04 V1494 AQL December 15, 1999 0501-04 AQ ERI 1937+21 FY VUL 0855+18 SY CNC ---------------------------------------------------------------------------- 0006-12 WW CETI The dwarf nova type (possible Z CAM subclass) cataclysmic variable WW CET is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 13.4993 13.7 SRX DEC 14.4854 11.8 SRX DEC 14.0500 12.3 SXN DEC 14.869 11.7 MUY DEC 14.4688 12.0 SRX DEC 15.2125 12.0 SQN ---------------------------------------------------------------------------- 0401+50 FO PERSEI The dwarf nova type cataclysmic variable FO PER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 11.2660 15.0: SXN DEC 14.758 13.7 MUY ---------------------------------------------------------------------------- 0501-04 AQ ERIDANI The dwarf nova type (SU UMA subclass) cataclysmic variable AQ ERI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 13.4944 <14.0 SRX DEC 14.4736 13.3 WPX DEC 14.4646 13.2 SRX DEC 14.878 13.5 MUY ---------------------------------------------------------------------------- 0855+18 SY CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable SY CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 08.220 13.4 MUY DEC 13.258 12.0 MUY DEC 08.4208 13.3 SXN DEC 13.6000 11.6 SRX DEC 10.87 12.4 GUN DEC 14.002 12.0 PYG DEC 11.4104 12.5 SXN DEC 14.894 11.9 MUY ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 04.795 15.2 PYG DEC 13.760 14.6 PYG DEC 07.754 15.1 PYG ---------------------------------------------------------------------------- 1918+04 V1494 AQUILAE Following are observations of the new nova in Aquila that have been submitted to the AAVSO since the release of News Flash No. 544: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 04.9417 4.9 WAH DEC 13.753 6.5 MUY DEC 05.063 4.8 KRX DEC 13.7535 6.2 VOL DEC 05.9479 5.1 WAH DEC 13.7653 6.3 VFK DEC 07.9792 5.8 WAH DEC 13.7903 6.3 LSI DEC 10.72 5.8 OCI DEC 13.86 6.3 PDQ DEC 10.7375 6.2 JCN DEC 13.9535 6.3 KMA DEC 11.677 6.0 BXT DEC 13.9826 6.5 BEB DEC 11.7125 6.2 LSI DEC 14.0139 6.4 SXN DEC 11.7444 6.2 JCN DEC 14.094 6.4 LMK DEC 11.9563 6.0 WAH DEC 14.6139 6.2 LME DEC 12.054 6.3 KRX DEC 14.701 6.3 SPK DEC 12.7569 6.2 CPT DEC 14.708 6.3 SPK DEC 12.9944 6.4 WAH DEC 14.708 6.5 MUY DEC 13.4965 6.1 SHW DEC 14.711 6.5 TUB DEC 13.687 6.3 SPK DEC 14.717 6.3 SPK DEC 13.6882 6.2 FSE DEC 14.73 6.3 CMH DEC 13.6979 6.1 BSR DEC 14.733 6.5 FMC DEC 13.7188 6.2 BSR DEC 14.736 6.3 PYG DEC 13.722 6.3 PYG DEC 14.743 6.3 SPK DEC 13.7284 6.3 ZAM DEC 15.1000 6.6 AAP DEC 13.7500 6.2 LME DEC 15.101 6.5 LMK ---------------------------------------------------------------------------- 1937+21 FY VULPECULAE The dwarf nova type (Z CAM subclass) cataclysmic variable FY VUL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 07.762 14.2 PYG DEC 13.748 13.7 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: AAP - A. ABBOTT, CANADA MUY - E. MUYLLAERT, BELGIUM BEB - R. BERG, USA OCI - C. OVIDIU, ROMANIA BSR - S. BARONI, ITALY PDQ - D. PROUST, FRANCE BXT - T. BJERKGAARD, NORWAY PYG - G. POYNER, ENGLAND CMH - M. CHAPELET, FRANCE SHW - W. SHERMAN, USA CPT - P. CHEVALLEY, SWITZERLAND SPK - P. SCHMEER, GERMANY FMC - M. FRANGEUL, FRANCE SQN - L. SHAW, USA FSE - S. FOGLIA, ITALY SRX - R. STUBBINGS, AUSTRALIA GUN - J. GUNTHER, FRANCE SXN - M. SIMONSEN, USA JCN - C. JONES, ENGLAND TUB - V. TUBOLY, HUNGARY KMA - M. KOMOROUS, CANADA VFK - F. VOHLA, GERMANY KRX - R. KEEN, USA VOL - W. VOLLMANN, AUSTRIA LME - M. LYONS, ENGLAND WAH - A. WHITING, USA LMK - M. LINNOLT, USA WPX - P. WILLIAMS, NEW ZEALAND LSI - S. LEONINI, ITALY ZAM - M. ZANOTTA, ITALY 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! ____________________________________________________________________________