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: 0243+37 PY PER 1730-47 BF ARA No. 513 0524-03 V1159 ORI 1841+43 V344 LYR October 15, 1999 0547-05 CN ORI 1925+42 V1504 CYG 0804+28 YZ CNC 1934+30 EM CYG 1719-35 V478 SCO 1953+77 AB DRA ---------------------------------------------------------------------------- 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 observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 02.388 16.0 CCDV OCN OCT 11.892 <13.9 MUY OCT 06.893 <13.9 MUY OCT 13.911 14.2 MUY ---------------------------------------------------------------------------- 0524-03 V1159 ORIONIS The dwarf nova type (SU UMA subclass) cataclysmic variable V1159 ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 12.361 15.2 CCDV OCN OCT 14.7556 13.7 SRX ---------------------------------------------------------------------------- 0547-05 CN ORIONIS The dwarf nova type (Z CAM subclass) cataclysmic variable CN ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 12.368 14.9 CCDV OCN OCT 14.7549 12.8 SRX ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 12.3960 15.99 CCDV ZRE OCT 14.7611 12.0: SRX ---------------------------------------------------------------------------- 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 OCT 01.4618 <15.0 SRX OCT 14.4819 14.5 SRX OCT 10.4576 <14.6 SRX ---------------------------------------------------------------------------- 1730-47 BF ARAE The dwarf nova type (SS CYG subclass) cataclysmic variable BF ARA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 08.4472 15.1 SRX OCT 12.4431 <14.8 SRX OCT 10.4993 <15.0 SRX OCT 14.4653 14.1 SRX ---------------------------------------------------------------------------- 1841+43 V344 LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable V344 LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 02.934 <15.5 PYG OCT 12.817 <14.8 PYG OCT 11.893 <14.8 PYG OCT 13.830 15.1 PYG ---------------------------------------------------------------------------- 1925+42 V1504 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V1504 CYG appears to be going into outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials OCT 12.237 <17.4 CCDV OCN OCT 13.831 <14.5 MUY OCT 12.814 <14.5 MUY OCT 13.930 <15.3 PYG OCT 12.905 <15.0 PYG OCT 15.156 15.9 CCDV OCN ---------------------------------------------------------------------------- 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 OCT 12.0653 13.9 MKJ OCT 13.7639 13.0 DPV OCT 12.815 14.2 MUY OCT 13.836 12.8 MUY OCT 12.8431 13.9 POX OCT 13.872 13.0 PYG OCT 12.876 13.2 PYG OCT 15.0451 12.5 BEB ---------------------------------------------------------------------------- 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 OCT 13.821 15.1 PYG OCT 15.0519 12.7 BEB ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA POX - M. POXON, ENGLAND DPV - P. DUBOVSKY, SLOVAKIA PYG - G. POYNER, ENGLAND MKJ - J. MCKENNA, USA SRX - R. STUBBINGS, AUSTRALIA 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! ____________________________________________________________________________