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: 0524-03 V1159 ORI 1738+23 V660 HER No. 420 0803+62 SU UMA 1920-10 DH AQL April 8, 1999 1004-69 OY CAR 1953+77 AB DRA 1552+72 SS UMI ---------------------------------------------------------------------------- 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 MAR 27.0400 14.75 CCDV ZRE APR 08.0493 13.6 BRJ MAR 29.836 <13.6 PYG ---------------------------------------------------------------------------- 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 06.0688 <13.9 KMA APR 08.0708 12.4 BRJ APR 06.1014 14.0 MKJ APR 08.0993 12.9 MKJ APR 06.1690 14.62 CCDV ZRE ---------------------------------------------------------------------------- 1004-69 OY CARINAE The dwarf nova type (SU UMA subclass) cataclysmic variable OY CAR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 03.4542 <14.1 SRX APR 08.517 12.3 MMZ APR 07.4750 12.2 TJN APR 08.559 12.3 MMZ ---------------------------------------------------------------------------- 1552+72 SS URSAE MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SS UMI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 19.0972 15.0: CGF APR 05.1035 14.5 CGF MAR 28.063 <14.5 PYG APR 06.1014 14.0 CGF MAR 29.897 <14.2 PYG APR 08.0757 14.0 BRJ ---------------------------------------------------------------------------- 1738+23 V660 HERCULIS The dwarf nova type cataclysmic variable V660 HER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 14.092 <14.9 PYG APR 05.023 14.2 KTO MAR 28.056 <14.5 PYG APR 05.082 14.2 KTO APR 03.05 <14.3 KTO ---------------------------------------------------------------------------- 1920-10 DH AQUILAE The dwarf nova type (SU UMA subclass) cataclysmic variable DH AQL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 04.882 <14.5 PEX APR 07.856 12.4 PEX ---------------------------------------------------------------------------- 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 APR 05.07 <13.6 KTO APR 08.0785 12.4 BRJ ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA PEX - A. PEARCE, AUSTRALIA CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND KMA - M. KOMOROUS, CANADA SRX - R. STUBBINGS, AUSTRALIA KTO - T. KINNUNEN, FINLAND TJN - J. TILBROOK, AUSTRALIA MKJ - J. MCKENNA, USA ZRE - R. ZISSELL, USA MMZ - M. MATTIAZZO, AUSTRALIA 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! ____________________________________________________________________________