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: 0130+50 KT PER 0855+18 SY CNC No. 344 0217+70 AM CAS 0939+52 ER UMA September 21, 1998 0518+00 BI ORI 0945+12 X LEO 0547-05 CN ORI 1805-14 UZ SER 0749+22 U GEM 1841+37 AY LYR 0804+28 YZ CNC 1937+21 FY VUL 0854-24 VZ PYX 2026-45 TU IND ---------------------------------------------------------------------------- 0130+50 KT PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable KT PER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 15.4438 <14.7 HSG SEP 19.98 12.6 KTO SEP 18.1056 13.4 BRJ SEP 20.3194 12.5 GRI SEP 18.3639 12.7 HSG SEP 20.4250 12.7 HSG SEP 18.95 12.7 VET SEP 20.92 12.8 VET SEP 19.0819 12.1 BRJ SEP 21.030 12.0 PYG SEP 19.4278 12.2 HSG SEP 21.2167 12.2 GRI SEP 19.931 12.2 PYG SEP 21.4035 12.3 HSG ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 14.2181 15.3: HSG SEP 19.4181 14.3 HSG SEP 15.2083 15.0: HSG SEP 20.058 14.0 CGF SEP 17.1583 14.6 HSG SEP 20.4153 13.1 HSG SEP 18.1 <14.5 CGF SEP 21.029 13.5 CGF SEP 18.3444 14.3 HSG SEP 21.3958 12.6 HSG ---------------------------------------------------------------------------- 0518+00 BI ORIONIS The dwarf nova type cataclysmic variable BI ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 20.4347 <15.0 HSG SEP 21.4132 14.9 HSG According to the AAVSO International Database this star is fainter than visual magnitude 16.0 during quiescence. ---------------------------------------------------------------------------- 0547-05 CN ORIONIS The dwarf nova type (Z CAM subclass) cataclysmic variable CN ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 20.4333 <14.6 HSG SEP 21.4125 13.3 HSG ---------------------------------------------------------------------------- 0749+22 U GEMINORUM The dwarf nova type (SS CYG subclass) cataclysmic variable U GEM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 15.4563 14.6: HSG SEP 20.01 9.9 KTO SEP 17.3979 <13.3 KMA SEP 20.156 9.9 SPK SEP 18.175 <12.4 SPK SEP 20.3785 9.7 KMA SEP 18.3778 <13.3 HSG SEP 20.3826 9.7 HSG SEP 18.3833 <13.8 KMA SEP 20.4243 9.7 HAB SEP 19.3861 <12.6 MDP SEP 20.4424 9.7 HSG SEP 19.4056 13.4 KMA SEP 21.1347 9.2 KHL SEP 19.4479 13.6 HSG SEP 21.4167 10.1 HSG SEP 19.4965 13.5 HSG ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 14.4764 15.0: HSG SEP 20.4458 11.9 HSG SEP 15.4625 14.8: HSG SEP 21.4181 12.6 HSG SEP 19.4486 12.1 HSG ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 17.7868 <14.7 SRX SEP 20.7868 13.0 SRX ---------------------------------------------------------------------------- 0855+18 SY CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable SY CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 19.4979 11.5 HSG SEP 20.4556 11.8 HSG According to the AAVSO International Database this star is fainter than visual magnitude 13.0 during quiescence. ---------------------------------------------------------------------------- 0939+52 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 AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 15.4604 <14.7 HSG SEP 20.4493 12.7 HSG SEP 19.4514 13.0 HSG SEP 21.4208 12.7 HSG ---------------------------------------------------------------------------- 0945+12 X LEONIS The dwarf nova type cataclysmic variable X LEO appears to be in outburst, as indicated by the following observations: AAVSO Observer UT Mag. Initials SEP 19.5014 12.2 HSG According to the AAVSO International Database this star is fainter than visual magnitude 15.3 during quiescence. ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (possible Z CAM subclass) cataclysmic variable UZ SER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 18.1375 <14.8 HSG SEP 19.1396 13.0 HSG SEP 18.4285 13.0 SRX SEP 20.4236 13.2 SRX SEP 19.0542 12.7 BRJ SEP 20.84 12.4 VET ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 17.1326 <15.5 HSG SEP 20.0833 13.5 BTB SEP 17.893 15.80 CCD SMI SEP 20.1188 13.0 MKJ SEP 18.1 <14.2 CGF SEP 20.3854 13.3 HSG SEP 18.1479 <15.5 HSG SEP 20.84 13.2 VET SEP 19.1444 <15.5 HSG SEP 20.877 13.5 PYG SEP 19.861 13.66 CCD SMI SEP 21.031 14.0 CGF SEP 19.920 13.0 PYG SEP 21.0750 13.8 GRI SEP 20.026 13.5 CGF SEP 21.3722 13.9: HSG ---------------------------------------------------------------------------- 1937+21 FY VULPECULAE The dwarf nova type (Z CAM subclass) cataclysmic variable FY VUL appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 16.024 14.6 PYG SEP 20.913 13.9 PYG ---------------------------------------------------------------------------- 2026-45 TU INDI The dwarf nova type cataclysmic variable TU IND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials SEP 17.4611 <15.0 SRX SEP 20.4597 14.0 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA KTO - T. KINNUNEN, FINLAND BTB - T. BRETL, USA MDP - P. MCDONALD, CANADA CGF - G. CHAPLE JR., USA MKJ - J. MCKENNA, USA GRI - J. GRIESE III, USA PYG - G. POYNER, ENGLAND HAB - R. HAYS JR., USA SMI - A. SMITH, ENGLAND HSG - G. HANSON II, USA SPK - P. SCHMEER, GERMANY KHL - M. KOHL, SWITZERLAND SRX - R. STUBBINGS, AUSTRALIA KMA - M. KOMOROUS, CANADA VET - M. VERDENET, FRANCE 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! ____________________________________________________________________________