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: BF Ara, AT Cnc, HL CMa, No. 274 AM Cas, NN Cen, FO Per March 18, 1998 ________________________________________________________________________________ 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 UT Mag. Initials MAR 10.7708 <14.8 SRX MAR 17.7694 14.0 SRX MAR 18.6251 14.0 SRX ----------------------------------------------------------------------------- AT CANCRI The dwarf nova type (Z Cam subclass) cataclysmic variable AT Cnc is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 16.4479 <13.8 SRX MAR 18.4354 12.9 SRX MAR 17.0965 <14.0 MKJ MAR 18.4590 12.9 SRX ----------------------------------------------------------------------------- HL CANIS MAJORIS The dwarf nova type (Z Cam subclass) cataclysmic variable HL CMa appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 11.850 <13.7 PYG MAR 16.4444 <13.7 SRX MAR 18.4250 11.6 SRX ----------------------------------------------------------------------------- AM CASSIOPEIAE The dwarf nova type (Z Cam subclass) cataclysmic variable AM Cas appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 17.019 14.7 CGF MAR 18.087 13.1 CGF ----------------------------------------------------------------------------- NN CENTAURI The dwarf nova type (SS Cyg subclass) cataclysmic variable NN Cen appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 10.7806 <14.5 SRX MAR 17.7715 14.0 SRX MAR 16.5035 14.1 SRX MAR 18.4493 14.0 SRX ----------------------------------------------------------------------------- FO PERSEI The dwarf nova type cataclysmic variable FO Per appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 01.1340 <15.0 HSG MAR 17.0 <14.2 CGF MAR 03.1264 14.8 HSG MAR 18.057 13.4 CGF ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. Chaple, USA PYG - G. Poyner, England HSG - G. Hanson, USA SRX - R. Stubbings, Australia MKJ - J. McKenna, 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! _______________________________________________________________________________