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: 0109+37 FO AND 1552+72 SS UMI No. 331 0206+57A TZ PER 1608-28 V893 SCO August 18, 1998 0217+70 AM CAS 1612-54 HP NOR 0809-76 Z CHA 1904+43 MV LYR 1307-60 NN CEN 2103+36 V1060 CYG NOTE: We regret that we have had system difficulties over the weekend. Everything but the web and ftp sites are now up and running. Stop by and visit our new web site in a couple of days. ---------------------------------------------------------------------------- 0109+37 FO ANDROMEDAE The dwarf nova type (SU UMA subclass) cataclysmic variable FO AND is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 15.2806 <15.4 HSG AUG 16.951 14.6 PYG AUG 16.053 <15.3 PYG AUG 17.106 14.9 BOS ---------------------------------------------------------------------------- 0206+57A 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 AUG 13.076 14.7 PYG AUG 16.958 13.1 PYG AUG 15.3063 13.6 HSG AUG 16.98 12.8 KTO AUG 15.99 13.7 KTO AUG 17.061 12.8 BOS AUG 16.068 14.4 PYG AUG 17.99 12.8 KTO ---------------------------------------------------------------------------- 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 AUG 05.4625 14.8 HSG AUG 14.0931 13.2 CGF AUG 11.1 <13.5 CGF AUG 15.3035 12.7 HSG AUG 12.0292 12.7 POX ---------------------------------------------------------------------------- 0809-76 Z CHAMAELONIS The dwarf nova type (SU UMA subclass) cataclysmic variable Z CHA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 23.3819 15.1 SRX AUG 18.5660 13.3 SRX AUG 16.3965 <14.0 SRX AUG 18.5667 13.4 SRX AUG 17.489 <13.4 TJN AUG 18.5674 13.5 SRX AUG 18.3819 13.2 SRX AUG 18.5681 13.5 SRX AUG 18.4174 13.1 SRX AUG 18.5688 13.4 SRX AUG 18.490 12.8 TJN AUG 18.5694 13.3 SRX AUG 18.5653 13.2 SRX AUG 18.5701 13.2 SRX ---------------------------------------------------------------------------- 1307-60 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 AUG 13.3743 13.8 SRX AUG 16.4007 13.5 SRX AUG 14.4903 13.7 SRX AUG 18.3785 13.8 SRX According to the AAVSO International Database this star is fainter than visual magnitude 16.0 during quiescence. ---------------------------------------------------------------------------- 1552+72 SS URSAE MINORIS The dwarf nova type (SU UMA subclass) cataclysmic variable SS UMI may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 12.938 <15.4 PYG AUG 16.947 15.1: PYG AUG 15.2403 <14.7 HSG AUG 17.924 14.8 PYG AUG 15.962 <15.0 PYG ---------------------------------------------------------------------------- 1608-28 V893 SCORPII The dwarf nova type cataclysmic variable V893 SCO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 13.76 13.9: MLF AUG 16.4056 13.8 SRX AUG 14.5111 13.8 SRX AUG 18.4368 13.2 SRX AUG 15.71 13.8 MLF AUG 18.5771 12.8 SRX AUG 16.4056 13.8 SRX ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 14.5000 <14.8 SRX AUG 16.717 13.4 MLF AUG 15.718 13.3 MLF AUG 17.71 13.6 MLF AUG 16.4201 13.2 SRX AUG 18.4181 13.8 SRX ---------------------------------------------------------------------------- 1904+43 MV LYRAE The nova-like variable MV LYR is brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 24.966 15.9: PYG AUG 15.92 14.2 KTO JUL 29.4500 <15.2 HSG AUG 15.945 14.4 BOS AUG 02.013 <14.8 PYG AUG 15.972 14.5 PYG AUG 05.4347 <15.0 HSG AUG 16.2076 14.2 BTH AUG 08.996 <14.2 PYG AUG 16.87 14.3 KTO AUG 09.2215 14.2 BTH AUG 16.910 14.4 BOS AUG 09.956 <14.8 PYG AUG 16.972 14.9 PYG AUG 10.2208 14.4 BTH AUG 17.90 14.5 KTO AUG 11.949 14.7 PYG AUG 17.936 14.7 PYG AUG 12.949 14.5 PYG AUG 18.2076 14.4: BTH AUG 15.2542 15.1 HSG ---------------------------------------------------------------------------- 2103+36 V1060 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V1060 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials AUG 13.005 <15.1 PYG AUG 16.908 13.5 PYG AUG 15.992 13.5 PYG AUG 16.985 13.1 BOS AUG 16.094 13.5 PYG AUG 17.85 13.1 KTO AUG 16.86 13.2 KTO AUG 17.899 13.4 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BOS - E. BROENS, BELGIUM MLF - L. MONARD, SOUTH AFRICA BTH - T. BURROWS, USA POX - M. POXON, ENGLAND CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND HSG - G. HANSON II, USA SRX - R. STUBBINGS, AUSTRALIA KTO - T. KINNUNEN, FINLAND TJN - J. TILBROOK, AUSTRALIA 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! ____________________________________________________________________________