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: AT Ara, HT Cas, BP CrA, AB Dra, IR Gem, No. 281 VW Hyi, WX Hyi, TU Ind, V2051 Oph, BI Ori, March 30, 1998 CN Ori, FO Per, TZ Per ________________________________________________________________________________ AT ARAE The dwarf nova type (SS Cyg subclass) cataclysmic variable AT Ara appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 27.7132 14.5 SRX MAR 30.5264 13.6 SRX ----------------------------------------------------------------------------- HT CASSIOPEIAE The dwarf nova type (SU UMa subclass) cataclysmic variable HT Cas is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 28.0361 17.10 CCDV ZRE MAR 30.024 13.0 CGF MAR 29.0 <13.9 CGF MAR 30.0389 13.0 BRJ MAR 29.0354 <14.0 BRJ MAR 30.0416 13.10 CCDV ZRE According to the AAVSO International Database the last observed outburst of this star was in March of 1997. ----------------------------------------------------------------------------- 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 UT Mag. Initials MAR 24.6590 <14.6 SRX MAR 27.7035 14.0 SRX ----------------------------------------------------------------------------- AB DRACONIS The dwarf nova type (Z Cam subclass) cataclysmic variable AB Dra in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 28.10 14.1 GRL MAR 30.0688 12.7 BRJ MAR 29.0674 13.4 BRJ MAR 30.072 12.7 CGF MAR 29.07 12.7 DGP ----------------------------------------------------------------------------- IR GEMINORUM The dwarf nova type (SU UMa subclass) cataclysmic variable IR Gem is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 26.0590 16.61 CCDV ZRE MAR 29.07 13.0 DGP MAR 28.0970 15.71 CCDV ZRE MAR 30.0535 13.6 BRJ MAR 28.1 <13.7 CGF MAR 30.056 12.8 CGF MAR 29.0542 12.6 BRJ MAR 30.0720 13.14 CCDV ZRE MAR 29.062 12.6 CGF MAR 30.1049 <13.6 MKJ ----------------------------------------------------------------------------- VW HYDRI The dwarf nova type (SU UMa subclass) cataclysmic variable VW Hyi is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 27.4118 13.4 SRX MAR 29.760 9.0 SJX MAR 27.7 <12.9 OB MAR 30.4937 9.7 SRX MAR 29.722 9.0 OB MAR 30.5188 9.6 SRX ----------------------------------------------------------------------------- WX HYDRI The dwarf nova type (SU UMa subclass) cataclysmic variable WX Hyi appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 27.4139 14.6 SRX MAR 30.4951 12.9 SRX ----------------------------------------------------------------------------- TU INDI The dwarf nova type cataclysmic variable TU Ind appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 24.6604 <14.8 SRX MAR 25.6535 <14.0 SRX MAR 27.7000 13.9 SRX ----------------------------------------------------------------------------- V2051 OPHIUCHI The eclipsing nova-like variable V2051 Oph appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 25.6521 <14.3 SRX MAR 27.6938 <14.5 SRX MAR 27.6875 13.6 SRX MAR 27.6944 <14.5 SRX MAR 27.6882 13.6 SRX MAR 27.6951 14.5 SRX MAR 27.6889 13.6 SRX MAR 27.6958 14.3 SRX MAR 27.6896 13.8 SRX MAR 27.6965 13.9 SRX MAR 27.6903 13.9 SRX MAR 27.6972 13.8 SRX MAR 27.6910 14.0 SRX MAR 27.6979 13.6 SRX MAR 27.6917 14.3 SRX MAR 27.6986 13.6 SRX MAR 27.6924 <14.5 SRX MAR 27.6993 13.6 SRX MAR 27.6931 <14.5 SRX ----------------------------------------------------------------------------- BI ORIONIS The dwarf nova type cataclysmic variable BI Ori appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials MAR 25.1340 <15.1 HSG MAR 29.0 <14.6 CGF MAR 30.040 14.4 CGF ----------------------------------------------------------------------------- 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 MAR 25.1326 <14.6 HSG MAR 30.04 12.7 DGP MAR 27.4243 <14.0 SRX MAR 30.0493 12.8 BRJ MAR 29.0486 13.3 BRJ MAR 30.4972 12.6 SRX MAR 29.1167 13.3 DLA ----------------------------------------------------------------------------- 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 MAR 25.1313 <15.0 HSG MAR 29.0431 13.2 BRJ MAR 26.0 <14.2 CGF MAR 29.07 13.3 DGP MAR 27.0361 13.1 BRJ MAR 30.0444 13.2 BRJ MAR 27.066 13.1 CGF ----------------------------------------------------------------------------- TZ PERSEI The dwarf nova type (Z Cam subclass) cataclysmic variable TZ Per is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 25.1285 14.6: HSG MAR 29.0972 12.9 DLA MAR 27.0451 13.6 BRJ MAR 30.04 13.1 DGP MAR 28.8 13.4 VET MAR 30.0414 12.9 BRJ MAR 29.0396 12.8 BRJ ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. Bortle, USA MKJ - J. McKenna, USA CGF - G. Chaple, USA OB - D. Overbeek, South Africa DGP - G. Dyck, USA SJX - J. Smit, South Africa DLA - A. Dill, USA SRX - R. Stubbings, Australia GRL - B. Granslo, Norway VET - M. Verdenet, France HSG - G. Hanson, USA 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! Rebecca Pellock, Technical Assistant on behalf of Janet A. Mattei, Director ________________________________________________________________________________ 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! _______________________________________________________________________________