THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 INTERNET: aavso@aavso.org * * * AAVSO NEWS FLASH * * * Subject: SY Cnc, HL CMa, SV CMi, No. 287 EX Dra, T Leo, SU Tau April 13, 1998 ____________________________________________________________________________ SY CANCRI The dwarf nova type (Z Cam subclass) cataclysmic variable SY Cnc is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.0576 13.0 SWT APR 13.049 12.1 CGF APR 11.034 12.8 CGF APR 13.0667 12.7 BRJ APR 11.1181 12.8 MKJ APR 13.4222 12.0 SRX APR 12.037 12.4 CGF ----------------------------------------------------------------------------- HL CANIS MAJORIS The dwarf nova type (Z Cam subclass) cataclysmic variable HL CMa is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.4063 <13.7 SRX APR 13.0465 11.9 BRJ APR 12.03 11.7 DGP APR 13.4125 11.5 SRX APR 13.029 11.7 CGF ----------------------------------------------------------------------------- SV CANIS MINORIS The dwarf nova type (Z Cam subclass) cataclysmic variable SV CMi is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 12.03 13.7 DGP APR 13.0618 13.2 BRJ APR 12.045 13.3 CGF APR 13.4153 13.4 SRX APR 13.044 12.9 CGF According to the AAVSO International Database this star is fainter than visual magnitude 15.5 during quiescence. ----------------------------------------------------------------------------- EX DRACONIS The dwarf nova type cataclysmic variable EX Dra is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 08.4618 <15.3 HSG APR 13.059 13.6 CGF APR 11.2410 14.2 CCDV ZRE APR 13.2882 13.0 CCDV ZRE APR 12.1520 14.1 CCDV ZRE ----------------------------------------------------------------------------- T LEONIS The dwarf nova type (SU UMa subclass) cataclysmic variable T Leo is in outburst (probable superoutburst), as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 05.4694 14.4: HSG APR 13.0688 11.0 BRJ APR 05.888 13.8 SPK APR 13.2347 11.0 HSG APR 12.908 10.4 SPK ----------------------------------------------------------------------------- SU TAURI The R CrB type variable SU Tau appears to recovering from its recent faint state, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 01.1424 14.7 HSG APR 11.0792 13.6 KMA APR 06.0625 14.0 KMA APR 12.8882 13.2: BMM APR 07.0333 13.6 SWT APR 13.0500 13.4 KMA APR 07.0708 13.6 MKJ APR 13.0604 13.3 BRJ APR 07.134 13.7 MRV ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. Biesmans, Belgium MKJ - J. McKenna, USA BRJ - J. Bortle, USA MRV - R. Modic, USA CGF - G. Chaple, USA SPK - P. Schmeer, Germany DGP - G. Dyck, USA SRX - R. Stubbings, Australia HSG - G. Hanson, USA SWT - R. Stewart, USA KMA - M. A. Komorous, Canada 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 ____________________________________________________________________________ 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 sending a message to: observations@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 We look forward to including your observations in future editions of AAVSO NEWS FLASH! ___________________________________________________________________________