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: 0012+56 DK CAS 0804+28 YZ CNC No. 534 0109+37 FO AND 1207-43 MU CEN November 29, 1999 0130+50 KT PER 1804+67 EX DRA 0207-63 WX HYI 1848+26 CY LYR 0401+50 FO PER 1911-00 FO AQL 0418-13 AH ERI 1934+30 EM CYG 0744-23 BV PUP 2125-03 VZ AQR ---------------------------------------------------------------------------- 0012+56 DK CASSIOPEIAE The dwarf nova type (SS CYG subclass) cataclysmic variable DK CAS appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 21.156 <18.0 CCD SPK NOV 27.137 15.3 CCD SPK ---------------------------------------------------------------------------- 0109+37 FO ANDROMEDAE The dwarf nova type (SU UMA subclass) cataclysmic variable FO AND is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 28.1560 17.08 CCDV ZRE NOV 29.1990 15.14 CCDV ZRE NOV 29.0868 15.0 KB ---------------------------------------------------------------------------- 0130+50 KT PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable KT PER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 21.5215 <14.1 HSG NOV 25.354 12.5 CCDV OCN NOV 24.1375 12.1 CGF NOV 25.835 13.1 MUY NOV 24.799 12.8 MUY NOV 26.76 13.3 VET ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 27.4569 14.0 SRX NOV 29.4646 12.8 SRX NOV 28.4535 13.6 SRX NOV 29.5965 13.0 SRX ---------------------------------------------------------------------------- 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 NOV 20.799 <14.1 MUY NOV 28.83 14.0 VET NOV 21.5229 13.1 HSG NOV 29.2600 14.01 CCDV ZRE ---------------------------------------------------------------------------- 0418-13 AH ERIDANI The dwarf nova type cataclysmic variable AH ERI is undergoing an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 16.4069 <15.3 HSG NOV 28.1924 <13.3 SXN NOV 19.7333 <14.8 SRX NOV 28.4910 14.2 SRX NOV 26.4590 14.0 SRX NOV 29.4951 15.1 SRX NOV 27.4847 14.1 SRX ---------------------------------------------------------------------------- 0744-23 BV PUPPIS The dwarf nova type (SS CYG subclass) cataclysmic variable BV PUP appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 18.7014 <15.0 SRX NOV 28.4979 13.9 SRX NOV 19.7090 15.0 SRX NOV 29.5021 13.6 SRX NOV 27.5625 14.4 SRX ---------------------------------------------------------------------------- 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 NOV 21.5271 15.0 HSG NOV 29.12 10.9 DGP NOV 27.87 11.8 VET NOV 29.6278 11.6 SRX NOV 28.84 12.0 VET ---------------------------------------------------------------------------- 1207-43 MU CENTAURI The dwarf nova type (SS CYG subclass) cataclysmic variable MU CEN appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 19.7278 <14.2 SRX NOV 29.6076 13.0 SRX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 21.5382 15.0: HSG NOV 27.9771 13.0 BRJ NOV 24.792 13.2 MUY ---------------------------------------------------------------------------- 1848+26 CY LYRAE The dwarf nova type cataclysmic variable CY LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 19.781 <14.9 PYG NOV 29.05 13.9 DGP NOV 28.0576 <13.4 SXN ---------------------------------------------------------------------------- 1911-00 FO AQUILAE The dwarf nova type (SS CYG subclass) cataclysmic variable FO AQL is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 19.750 <14.5 PYG NOV 27.9688 14.0 BRJ NOV 26.73 13.8 VET NOV 28.0090 13.4: SXN ---------------------------------------------------------------------------- 1934+30 EM CYGNI The dwarf nova type (Z CAM subclass) cataclysmic variable EM CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 19.0993 13.7 HSG NOV 29.0076 12.8 MKJ NOV 20.755 13.9: MUY NOV 29.05 13.0 DGP NOV 28.82 12.7 VET ---------------------------------------------------------------------------- 2125-03 VZ AQUARII The dwarf nova type cataclysmic variable VZ AQR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 28.4576 <14.0 SRX NOV 29.4771 13.0 SRX NOV 29.05 13.4 DGP ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA OCN - S. O'CONNOR, CANADA CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND DGP - G. DYCK, USA SPK - P. SCHMEER, GERMANY HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA KB - W. KAMINSKI, USA SXN - M. SIMONSEN, USA MKJ - J. MCKENNA, 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! ____________________________________________________________________________