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: 0401+50 FO PER 0854-24 VZ PYX No. 609 0547-05 CN ORI 1129-11 TT CRT April 25, 2000 0640-16 HL CMA 1344+08 CR BOO 0744-23 BV PUP 1953+77 AB DRA 0803+62 SU UMA ---------------------------------------------------------------------------- 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 APR 22.8333 <13.7 DPV APR 24.1333 13.3 HSG APR 22.856 <14.0 RMQ APR 25.0556 13.1 BRJ APR 23.1347 13.2 HSG APR 25.1417 13.1 HSG APR 23.835 14.0 RMQ ---------------------------------------------------------------------------- 0547-05 CN ORIONIS The dwarf nova type (Z CAM subclass) cataclysmic variable CN ORI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 23.1264 <13.6 HSG APR 24.3944 13.1 SRX APR 23.3792 13.8 SRX APR 25.1285 12.5 HSG APR 24.1306 13.1 HSG APR 25.244 12.8 LMK APR 24.250 12.9: LMK APR 25.3868 12.8 SRX ---------------------------------------------------------------------------- 0640-16 HL CANIS MAJORIS The dwarf nova type cataclysmic variable HL CMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 20.3729 <12.0 SRX APR 24.3938 11.6 SRX APR 22.1049 <11.8 DIL APR 25.1271 11.7 HSG APR 23.1250 11.7 HSG APR 25.239 11.5 LMK APR 23.3778 11.6 SRX APR 25.4049 11.4 SRX APR 24.1299 11.4 HSG ---------------------------------------------------------------------------- 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 APR 20.3750 <14.4 SRX APR 24.4083 13.6 SRX APR 23.3938 14.4 SRX APR 25.4076 13.2 SRX ---------------------------------------------------------------------------- 0803+62 SU URSAE MAJORIS The dwarf nova type (SU UMA subclass prototype) cataclysmic variable SU UMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 22.2271 15.01 CCDV GKA APR 23.8875 12.6 JCN APR 22.862 13.6 RMQ APR 24.1486 12.4 HSG APR 22.8854 13.6 DPV APR 24.8507 13.1 DPV APR 22.935 14.4 PYG APR 24.875 12.9 OJR APR 23.1369 12.6 BEB APR 24.951 13.0 RMQ APR 23.1507 12.5 HSG APR 25.0646 13.4 BRJ APR 23.8611 12.3 DPV APR 25.2097 13.4 HSG APR 23.864 12.7 OJR APR 25.333 <13.0 LMK APR 23.881 12.9 RMQ JUL .8375 12.2 CMG ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 22.71 <14.4 MLF APR 25.278 12.8 LMK APR 24.4514 12.8 SRX APR 25.4125 12.8 SRX ---------------------------------------------------------------------------- 1129-11 TT CRATERIS The dwarf nova type cataclysmic variable TT CRT is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 23.4000 14.5 SRX APR 25.2250 12.8 SXN APR 23.971 <14.2 MGH APR 25.4007 13.2 SRX APR 24.4167 13.8 SRX ---------------------------------------------------------------------------- 1344+08 CR BOOTIS The variable star CR BOO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 13.295 16.0 CCDV OCN APR 23.980 14.1 MGH APR 14.250 15.1 CCDV OCN APR 24.1611 14.2 HSG APR 23.036 14.5 PYG APR 25.2222 14.3 HSG APR 23.1715 14.9 HSG APR 25.2347 14.0 SXN ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 20.929 14.0 RMQ APR 23.9340 12.8 DPV APR 21.898 13.0 PYG APR 23.939 12.8 RMQ APR 21.9000 12.8 JCN APR 24.120 13.3 MUY APR 21.938 12.6 RMQ APR 24.1465 13.1 HSG APR 22.9201 12.8 DPV APR 24.9271 13.5 DPV APR 22.951 12.6 RMQ APR 24.955 13.4 RMQ APR 23.062 13.0 PYG APR 25.0708 13.6 BRJ APR 23.9118 13.0 JCN APR 25.2056 13.6 HSG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BEB - R. BERG, USA MGH - H. MCGEE, ENGLAND BRJ - J. BORTLE, USA MLF - L. MONARD, SOUTH AFRICA CMG - G. COMELLO, NETHERLANDS MUY - E. MUYLLAERT, BELGIUM DIL - W. DILLON, USA OCN - S. O'CONNOR, CANADA DPV - P. DUBOVSKY, SLOVAKIA OJR - J. OSORIO, SPAIN GKA - K. GRAHAM, USA PYG - G. POYNER, ENGLAND HSG - G. HANSON II, USA RMQ - M. RESZELSKI, POLAND JCN - C. JONES, ENGLAND SRX - R. STUBBINGS, AUSTRALIA LMK - M. LINNOLT, USA SXN - M. SIMONSEN, 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! ____________________________________________________________________________