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: FO Aql, TT Crt, V516 Cyg, AM Her, No. 284 WX Hyi, RZ LMi, CY Lyr, VZ Pyx, April 6, 1998 SU UMa, ER UMa, SS UMi ____________________________________________________________________________ FO AQUILAE The dwarf nova type (SS Cyg subclass) cataclysmic variable FO Aql is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 04.4618 <15.4 HSG APR 05.7076 13.7 SRX APR 05.0 <13.6 OB APR 06.098 13.3 OB APR 05.5188 13.9 HSG ----------------------------------------------------------------------------- TT CRATERIS The dwarf nova type cataclysmic variable TT Crt appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 05.4444 14.2 SRX APR 05.6208 13.8 SRX APR 05.7354 13.6 SRX ----------------------------------------------------------------------------- V516 CYGNI The dwarf nova type (SS Cyg subclass) cataclysmic variable V516 Cyg appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 01.4674 <15.5 HSG APR 04.4521 14.1 HSG APR 05.5056 14.1 HSG ----------------------------------------------------------------------------- AM HERCULIS The magnetic variable AM Her is brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 24.3360 15.2 CCDV ZRE APR 01.4535 15.0 HSG MAR 24.4618 14.9 HSG APR 03.0833 14.9 HAV MAR 25.0848 14.8 HAV APR 04.4368 14.4 HSG MAR 25.3060 14.7 CCDV ZRE APR 05.4917 14.1 HSG MAR 25.4493 15.0 HSG APR 06.0820 13.6 HAV MAR 31.036 14.8 PYG APR 06.3285 14.5 KMA MAR 31.4618 15.0 HSG ----------------------------------------------------------------------------- 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 AAVSO Observer UT Mag. Initials UT Mag. Initials APR 04.3965 14.4 SRX APR 05.4243 13.0 SRX APR 05.3937 13.2 SRX APR 05.7368 12.9 SRX ----------------------------------------------------------------------------- RZ LEONIS MINORIS The dwarf nova type (SU UMa subclass) cataclysmic variable RZ LMi is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 30.0611 15.0 BRJ APR 03.1417 14.3 BRJ MAR 30.921 14.4 PYG APR 04.4319 14.2 HSG MAR 31.1500 14.6: HSG APR 05.4729 14.1 HSG APR 01.1924 <14.1 HSG ----------------------------------------------------------------------------- CY LYRAE The dwarf nova type cataclysmic variable CY Lyr appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 04.4403 <14.8 HSG APR 05.4944 13.3 HSG ----------------------------------------------------------------------------- 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 03.4222 15.1 SRX APR 05.4014 13.2 SRX APR 04.4021 12.8 SRX APR 05.733 13.6 MLF APR 04.713 12.7 MLF ----------------------------------------------------------------------------- SU URSAE MAJORIS The dwarf nova type (SU UMa subclass prototype) cataclysmic variable SU UMa appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAR 31.1507 14.5 HSG APR 04.4181 12.6 HSG APR 01.1813 14.3 HSG APR 05.4750 12.8 HSG ----------------------------------------------------------------------------- ER URSAE MAJORIS The dwarf nova type (SU UMa subclass) cataclysmic variable ER UMa appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials APR 04.4208 15.0: HSG APR 05.4778 13.4 HSG ----------------------------------------------------------------------------- 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 31.2118 <15.8 HSG APR 04.4264 14.3 HSG APR 01.1882 <14.7 HSG APR 04.4813 14.2 HSG APR 03.1556 14.6 BRJ APR 05.4833 13.9 HSG ----------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. Bortle, USA OB - D. Overbeek, South Africa HAV - R. Harvan, USA PYG - G. Poyner, England HSG - G. Hanson, USA SRX - R. Stubbings, Australia KMA - M. A. Komorous, Canada ZRE - R. Zissell, USA MLF - B. Monard, South Africa 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! ___________________________________________________________________________