THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS 25 Birch Street, Cambridge, MA 02138 USA Tel. 617-354-0484 Fax 617-354-0665 http://www.aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0058+40 RX AND 1804+67 EX DRA No. 469 0109+37 FO AND 1805-14 UZ SER July 19, 1999 0139+37 AR AND 1953+77 AB DRA 1325-54 BV CEN 1958+16 RZ SGE 1612-54 HP NOR 2101+65 FX CEP ---------------------------------------------------------------------------- 0058+40 RX ANDROMEDAE The dwarf nova type (Z CAM subclass) cataclysmic variable RX AND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 17.969 <13.0 RMQ JUL 18.077 13.3 PYG JUL 17.982 13.2 MUY JUL 18.3361 11.9: SXN ---------------------------------------------------------------------------- 0109+37 FO ANDROMEDAE The dwarf nova type (SU UMA subclass) cataclysmic variable FO AND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 16.3280 17.76 CCDV ZRE JUL 18.068 14.5 PYG JUL 17.086 <14.8 PYG ---------------------------------------------------------------------------- 0139+37 AR ANDROMEDAE The dwarf nova type cataclysmic variable AR AND is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 13.084 <14.8 PYG JUL 17.3333 12.7 SXN JUL 16.1049 12.3 POX JUL 17.989 12.6 MUY JUL 16.976 12.1 MUY JUL 18.020 12.6 DPV JUL 17.083 12.5 PYG JUL 18.079 12.9 PYG ---------------------------------------------------------------------------- 1325-54 BV CENTAURI The dwarf nova type cataclysmic variable BV CEN appears to be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 03.4187 13.0 WPX JUL 09.4083 12.9 SRX JUL 04.3868 13.1 WPX JUL 13.5222 12.7 SRX JUL 09.4083 12.9 SRX JUL 18.4312 12.3 SRX ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 09.3910 <14.5 SRX JUL 15.3896 13.0 SRX JUL 13.3590 13.0 SRX JUL 16.848 12.8 OB JUL 13.9 <13.0 OB JUL 18.4083 13.2 SRX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 16.1424 15.0 CCDV ZRE JUL 17.927 <13.4 MUY JUL 16.915 <13.4 MUY JUL 17.938 13.5 PYG JUL 17.006 14.3 PYG ---------------------------------------------------------------------------- 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 JUL 14.1 <14.8 BRJ JUL 16.93 13.1 VET JUL 14.1350 15.41 CCDV ZRE JUL 16.936 12.7 MUY JUL 15.1153 12.7 BRJ JUL 17.92 12.1 VET JUL 15.3715 13.0 SRX JUL 17.947 13.0 MUY JUL 16.1740 12.79 CCDV ZRE JUL 17.961 12.9 DPV JUL 16.2146 12.8 CCDV COO JUL 18.4194 13.0 SRX JUL 16.834 12.6 OB ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 16.2320 14.7 CCDV ZRE JUL 17.941 12.8 PYG JUL 16.909 13.8: DPV JUL 17.948 13.0 RMQ JUL 16.916 14.0 MUY JUL 17.9576 12.9 JCN JUL 16.9910 13.9 POX JUL 18.0271 12.6 BMM JUL 17.010 13.6 PYG JUL 18.2632 12.5 SXN JUL 17.0160 13.7 BMM JUL 18.951 12.7 OJR JUL 17.0764 12.9 POX JUL 18.986 12.8 RMQ JUL 17.916 12.6 DPV JUL 19.0514 12.7 BMM JUL 17.930 12.8 MUY ---------------------------------------------------------------------------- 1958+16 RZ SAGITTAE The dwarf nova type (SU UMA subclass) cataclysmic variable RZ SGE appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 18.072 <15.3 PYG JUL 18.944 13.1 OJR ---------------------------------------------------------------------------- 2101+65 FX CEPHEI The dwarf nova type cataclysmic variable FX CEP may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 14.013 <15.4 PYG JUL 17.090 14.7 PYG JUL 17.013 14.8 PYG JUL 17.091 14.7 PYG JUL 17.013 14.8 PYG JUL 17.931 14.9 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BMM - M. BIESMANS, BELGIUM POX - M. POXON, ENGLAND BRJ - J. BORTLE, USA PYG - G. POYNER, ENGLAND COO - L. COOK, USA RMQ - M. RESZELSKI, POLAND DPV - P. DUBOVSKY, SLOVAKIA SRX - R. STUBBINGS, AUSTRALIA JCN - C. JONES, ENGLAND SXN - M. SIMONSEN, USA MUY - E. MUYLLAERT, BELGIUM VET - M. VERDENET, FRANCE OB - M. OVERBEEK, SOUTH AFRICA WPX - P. WILLIAMS, NEW ZEALAND OJR - J. OSORIO, SPAIN 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, Director Rebecca Pellock, Technical Assistant ____________________________________________________________________________ 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 visiting the following web page: http://www.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 An archive of past issues of the News Flash is available at the following web page: http://www.aavso.org/newsflash/ We look forward to including your observations in future editions of AAVSO NEWS FLASH! ____________________________________________________________________________