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: 0217+70 AM CAS 0939+52 ER UMA No. 388 0605+47 SS AUR 1140-03 TW VIR January 27, 1999 0804+28 YZ CNC 1640+25 AH HER 0822+25 AT CNC 1953+77 AB DRA ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS appears to be in outburst, as indicated by the following observation: AAVSO Observer UT Mag. Initials JAN 26.98 13.3 DGP ---------------------------------------------------------------------------- 0605+47 SS AURIGAE The dwarf nova type cataclysmic variable SS AUR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 23.4583 14.9: HSG JAN 26.98 13.3 DGP JAN 25.0403 <13.9 DKS JAN 27.042 12.9 GMC JAN 26.0917 13.9 DKS JAN 27.1000 12.3 DKS JAN 26.103 13.8 MUY JAN 27.2810 12.66 CCDV ZRE JAN 26.9792 <12.4 MDP ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 23.4681 15.0: HSG JAN 26.108 12.9 MUY JAN 23.5472 <14.4 SRX JAN 26.2640 12.35 CCDV ZRE JAN 26.0833 13.4 CMG JAN 27.2180 12.11 CCDV ZRE ---------------------------------------------------------------------------- 0822+25 AT CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable AT CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 22.1028 14.4 POX JAN 25.5056 13.2 SRX JAN 23.5437 <14.2 SRX JAN 26.109 13.1 MUY JAN 24.5063 13.5 SRX ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 23.4840 14.7 HSG JAN 26.118 13.8 MUY ---------------------------------------------------------------------------- 1140-03 TW VIRGINIS The dwarf nova type cataclysmic variable TW VIR appears to be undergoing an outburst, is indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 16.5722 15.0 SRX JAN 25.6396 14.1 SRX JAN 23.4771 14.8: HSG JAN 26.128 13.8 MUY JAN 25.4583 <14.3 DKS JAN 26.4472 13.2 DKS ---------------------------------------------------------------------------- 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 JAN 22.240 13.4 MUY JAN 26.4110 11.99 CCDV ZRE JAN 23.5000 13.0 HSG JAN 26.4653 11.5 DKS JAN 26.137 12.0 MUY JAN 27.3970 12.13 CCDV ZRE ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 21.765 14.6 PYG JAN 25.0417 12.6 DKS JAN 22.1340 13.4 POX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CMG - G. COMELLO, NETHERLANDS MUY - E. MUYLLAERT, BELGIUM DGP - G. DYCK, USA POX - M. POXON, ENGLAND DKS - S. DVORAK, USA PYG - G. POYNER, ENGLAND GMC - M. GILL, ENGLAND SRX - R. STUBBINGS, AUSTRALIA HSG - G. HANSON II, USA ZRE - R. ZISSELL, USA MDP - P. MCDONALD, CANADA 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! ____________________________________________________________________________