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: 0207-63 WX HYI 1805-14 UZ SER No. 502 0217+70 AM CAS 1830-37 BP CRA September 27, 1999 0243+37 PY PER 1911-00 FO AQL 0518+00 BI ORI 1934+30 EM CYG 0523-03 V1159 ORI 1953+77 AB DRA 0641+28 IR GEM 2023+43 V503 CYG 0804+28 YZ CNC 2043+41 V516 CYG 1719-35 V478 SCO ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI appears to have undergone an outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 20.4187 <14.0 SRX SEP 26.4035 <13.0 SRX SEP 24.4424 12.5 SRX ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS appears to have undergone an outburst , as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 24.0597 13.5 BRJ SEP 27.0149 14.4 BRJ ---------------------------------------------------------------------------- 0243+37 PY PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable PY PER appears to be in outburst, as indicated by the following observation: AAVSO Observer UT Mag. Initials SEP 26.308 14.4 CCDV OCN According to the AAVSO International Database this star is fainter than visual magnitude 15.5 during quiescence. ---------------------------------------------------------------------------- 0518+00 BI ORIONIS The dwarf nova type cataclysmic variable BI ORI appears to be in outburst, as indicated by the following observation: AAVSO Observer UT Mag. Initials SEP 26.400 14.6 CCDV OCN According to the AAVSO International Database this star is fainter than visual magnitude 15.6 during quiescence. ---------------------------------------------------------------------------- 0524-03 V1159 ORIONIS The dwarf nova type (SU UMA subclass) cataclysmic variable V1159 ORI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 20.7458 <14.6 SRX SEP 26.2980 13.15 CCDV ZRE SEP 24.3460 13.15 CCDV ZRE SEP 26.361 13.0 CCDV OCN SEP 24.3931 12.7 DPL ---------------------------------------------------------------------------- 0641+28 IR GEMINORUM The dwarf nova type (SU UMA subclass) cataclysmic variable IR GEM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 24.3660 16.03 CCDV ZRE SEP 26.3690 12.31 CCDV ZRE SEP 26.08 13.1 KTO ---------------------------------------------------------------------------- 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 SEP 24.3970 15.42 CCDV ZRE SEP 26.3830 12.55 CCDV ZRE ---------------------------------------------------------------------------- 1719-35 V478 SCORPII The dwarf nova type cataclysmic variable V478 SCO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 10.4521 15.1 SRX SEP 26.3979 14.4 SRX SEP 16.4229 <14.4 SRX SEP 27.3986 14.4 SRX ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (possible Z CAM subclass) cataclysmic variable UZ SER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 23.03 <13.5 BRJ SEP 27.0271 12.8 BRJ SEP 26.045 14.4 CCDV OCN SEP 27.052 12.8 CCDV OCN SEP 26.3965 13.2 SRX SEP 27.4042 13.1 SRX ---------------------------------------------------------------------------- 1830-37 BP CORONAE AUSTRINAE The dwarf nova type (Z CAM subclass) cataclysmic variable BP CRA appears to be in outburst, as indicated by the following observation: AAVSO Observer UT Mag. Initials SEP 27.4299 14.0 SRX According to the AAVSO International Database this star is fainter than visual magnitude 14.7 during quiescence. ---------------------------------------------------------------------------- 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 SEP 23.820 <14.9 PYG SEP 27.0208 13.3 MKJ SEP 26.063 13.7 CCDV OCN SEP 27.0278 13.7 BRJ SEP 26.1060 12.52 CCDV ZRE SEP 27.061 14.1 CCDV OCN SEP 26.3931 13.5 SRX SEP 27.4049 13.5 SRX ---------------------------------------------------------------------------- 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 SEP 21.821 14.2 MUY SEP 24.1350 13.0 CCDV ZRE SEP 23.824 12.9 PYG SEP 25.0564 12.4 BEB SEP 24.0278 12.4 BRJ SEP 27.0292 12.6 BRJ SEP 24.05 12.7 DGP SEP 27.0431 13.0 MKJ ---------------------------------------------------------------------------- 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 SEP 24.8083 14.9 JCN SEP 27.0361 12.6 BRJ ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 19.1220 17.58 CCDV ZRE SEP 21.838 <14.2 MUY SEP 20.863 <14.2 MUY SEP 26.1350 15.70 CCDV ZRE ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 19.1410 16.41 CCDV ZRE SEP 27.0333 14.0 BRJ SEP 26.1530 15.97 CCDV ZRE SEP 27.210 13.9 CCDV OCN SEP 26.179 15.9 CCDV OCN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA MKJ - J. MCKENNA, USA BRJ - J. BORTLE, USA MUY - E. MUYLLAERT, BELGIUM DGP - G. DYCK, USA OCN - S. O'CONNOR, CANADA DPL - P. DOMBROWSKI, USA PYG - G. POYNER, ENGLAND JCN - C. JONES, ENGLAND SRX - R. STUBBINGS, AUSTRALIA KTO - T. KINNUNEN, FINLAND 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! ____________________________________________________________________________