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: 0611+15 CZ ORI 1207-43 MU CEN No. 422 0804+28 YZ CNC 1730-47 BF ARA April 12, 1999 0809-76 Z CHA 1830-37 BP CRA 0833-47 BB VEL ---------------------------------------------------------------------------- 0611+15 CZ ORIONIS The dwarf nova type cataclysmic variable CZ ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 10.1472 <15.0 HSG APR 11.3924 <14.0 SRX APR 10.863 <14.8 PYG APR 11.833 <13.4 MUY APR 11.0590 <13.9 MKJ APR 12.3847 13.0 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 APR 09.1290 15.38 CCDV ZRE APR 11.0630 12.38 CCDV ZRE APR 09.1563 15.1: HSG APR 11.0674 12.2 BRJ APR 09.896 14.4 PYG APR 11.0792 11.8 MKJ APR 10.1653 14.5 HSG APR 11.1493 12.4 HSG APR 10.4583 <12.3 SRX APR 11.3979 12.1 SRX APR 10.872 12.0 PYG APR 11.840 12.4 MUY APR 11.0465 11.9 DPL APR 11.9 12.0 VET ---------------------------------------------------------------------------- 0809-76 Z CHAMAELONIS The dwarf nova type (SU UMA subclass) cataclysmic variable Z CHA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 09.3806 <14.4 SRX APR 10.4826 12.6 SRX ---------------------------------------------------------------------------- 0833-47 BB VELORUM The dwarf nova type cataclysmic variable BB VEL may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 08.5479 15.0 SRX APR 10.4868 14.6 SRX APR 09.4389 14.8 SRX APR 11.4292 14.6 SRX ---------------------------------------------------------------------------- 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 APR 10.4917 15.0 SRX APR 12.5028 14.2 SRX APR 11.3938 14.8 SRX APR 12.6951 14.2 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 APR 10.844 <15.0 PEX APR 11.844 14.6 PEX APR 11.5951 14.8 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 observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 11.6104 <14.6 SRX APR 12.5910 14.5 SRX APR 11.864 15.2 PEX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA PEX - A. PEARCE, AUSTRALIA DPL - P. DOMBROWSKI, USA PYG - G. POYNER, ENGLAND HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA 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! ____________________________________________________________________________