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: 0206+57A TZ PER 1640+25 AH HER No. 575 0518+00 BI ORI 1749-19 N SGR 00 February 14, 2000 0829+53 SW UMA ---------------------------------------------------------------------------- 0206+57A TZ PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable TZ PER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 09.8396 14.0 JCN FEB 11.799 12.9 MUY FEB 09.86 13.5 VET FEB 11.8674 13.3 JCN FEB 10.807 13.7 PYG FEB 12.0563 12.7 DKS FEB 10.824 13.0 MUY FEB 12.769 12.9 MUY FEB 10.8417 13.7 JCN FEB 12.806 12.3 OJR FEB 10.9167 13.1 DPV FEB 13.0410 12.6 BRJ FEB 11.1181 13.2 HSG FEB 13.826 12.8 PYG ---------------------------------------------------------------------------- 0518+00 BI ORIONIS The dwarf nova type cataclysmic variable BI ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 11.1146 <15.1 HSG FEB 13.0479 14.4 BRJ FEB 12.1764 <14.2 SXN FEB 13.4694 14.2 SRX FEB 12.4722 <14.6 SRX ---------------------------------------------------------------------------- 0829+53 SW URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SW UMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 09.1920 16.55 CCDV ZRE FEB 12.809 10.5 OJR FEB 11.2431 <15.6 HSG FEB 13.06 10.6 DGP FEB 11.9257 14.1 JCN FEB 13.0604 10.5 BRJ FEB 11.954 14.1: MGH FEB 13.1490 10.81 CCDV ZRE FEB 11.9549 14.1 JCN FEB 13.1757 10.5 DKS FEB 12.028 12.4 SPK FEB 13.770 10.5 SPK FEB 12.062 12.0 SPK FEB 13.785 10.6 PYG FEB 12.085 11.7 SPK FEB 13.810 10.6 SPK FEB 12.1257 11.5 TSC FEB 13.843 10.4 OJR FEB 12.1700 11.55 CCDV ZRE FEB 13.854 10.6 PYG FEB 12.211 11.0 SPK FEB 13.914 11.1 MOI FEB 12.74 10.7 GUN FEB 14.044 10.5 PYG FEB 12.753 10.5 MUY According to the AAVSO International Database the last outburst of this star occured in October 1997 when it reached approximate mean visual magnitude 10.7. ---------------------------------------------------------------------------- 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 FEB 09.3880 14.24 CCDV ZRE FEB 11.5535 14.0 HSG FEB 11.1215 14.4: DPV FEB 12.3130 13.56 CCDV ZRE FEB 11.217 13.8 MUY FEB 12.4194 13.0 SXN ---------------------------------------------------------------------------- 1749-19 N SGR 00 Below are recent observations of the new nova N SGR 00: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 11.4486 10.0: BDT FEB 12.7132 12.2 SRX FEB 11.4660 11.2 DKS FEB 12.829 12.0 PEX FEB 11.504 12.3 KRB FEB 13.819 12.4 PEX FEB 12.625 12.6 LMK ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BDT - D. BRANCHETT, USA MOI - E. MORILLON, FRANCE BRJ - J. BORTLE, USA MUY - E. MUYLLAERT, BELGIUM DGP - G. DYCK, USA OJR - J. OSORIO, SPAIN DKS - S. DVORAK, USA PEX - A. PEARCE, AUSTRALIA DPV - P. DUBOVSKY, SLOVAKIA PYG - G. POYNER, ENGLAND GUN - J. GUNTHER, FRANCE SPK - P. SCHMEER, GERMANY HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA JCN - C. JONES, ENGLAND SXN - M. SIMONSEN, USA KRB - R. KING, USA TSC - S. TRACY, USA LMK - M. LINNOLT, USA VET - M. VERDENET, FRANCE MGH - H. MCGEE, ENGLAND 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! ____________________________________________________________________________