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: 0043+56B GX CAS 0804+28 YZ CNC No. 555 0130+31 TW TRI 0822+25 AT CNC January 10, 2000 0131+29 TX TRI 1049+30 SX LMI 0401+50 FO PER 1454+41 TT BOO ---------------------------------------------------------------------------- 0043+56B GX CASSIOPEIAE The dwarf nova type (SU UMA subclass) cataclysmic variable GX CAS is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 08.0903 <15.2 HSG JAN 08.890 14.3 PYG JAN 08.831 14.4 PYG JAN 09.0104 14.5 BRJ JAN 08.831 14.4 PYG JAN 09.2833 14.2 HSG ---------------------------------------------------------------------------- 0130+31 TW TRIANGULI The dwarf nova type (Z CAM subclass) cataclysmic variable TW TRI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 06.101 16.0 CCDV OCN JAN 08.2104 14.0: SXN JAN 06.7910 <14.7 POX JAN 08.860 <14.2 MGH JAN 06.905 <14.2 MGH ---------------------------------------------------------------------------- 0131+29 TX TRIANGULI The dwarf nova type (SS CYG subclass) cataclysmic variable TX TRI may be going into outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 03.963 <15.6 PYG JAN 08.886 15.2: PYG JAN 06.876 <14.6 PYG ---------------------------------------------------------------------------- 0401+50 FO PERSEI The dwarf nova type cataclysmic variable FO PER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 08.1924 <15.0 HSG JAN 09.1000 14.05 CCDV ZRE JAN 08.2743 <14.2 SXN JAN 09.2889 13.3 HSG JAN 09.0063 13.1 BRJ ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 08.1993 15.1 HSG JAN 09.5556 14.0 SRX JAN 08.4049 <14.2 SXN JAN 09.6361 13.5 SRX JAN 08.995 14.5 PYG ---------------------------------------------------------------------------- 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 07.0590 <14.0 DPV JAN 08.5542 13.4 SRX JAN 07.6437 <13.8 SRX JAN 08.999 12.7 PYG JAN 08.0181 12.7 POX JAN 09.5576 13.0 SRX JAN 08.4118 12.8 SXN ---------------------------------------------------------------------------- 1049+30 SX LEONIS MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SX LMI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 04.103 <15.5 PYG JAN 09.035 <13.9 MGH JAN 06.2396 <14.2 HSG JAN 09.101 14.5 PYG JAN 07.1076 <13.5 DPV JAN 09.2951 14.0 HSG JAN 09.008 14.7 PYG ---------------------------------------------------------------------------- 1454+41 TT BOOTIS The dwarf nova type (SU UMA subclass) cataclysmic variable TT BOO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 04.135 <15.4 PYG JAN 09.056 <13.9 MGH JAN 07.1285 <13.9 DPV JAN 09.115 13.8 PYG JAN 07.237 <13.9 MUY ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA POX - M. POXON, ENGLAND DPV - P. DUBOVSKY, SLOVAKIA PYG - G. POYNER, ENGLAND HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA MGH - H. MCGEE, ENGLAND SXN - M. SIMONSEN, USA MUY - E. MUYLLAERT, BELGIUM ZRE - R. ZISSELL, USA OCN - S. O'CONNOR, 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! ____________________________________________________________________________