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: 0217+70 AM CAS 0804+28 YZ CNC No. 372 0401+50 FO PER 0854-24 VZ PYX December 9, 1998 0418-13 AH ERI 1804+67 EX DRA 0523-03 V1159 ORI 1830+24A CH HER 0744-23 BV PUP 1854+30 DM LYR ---------------------------------------------------------------------------- 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 DEC 05.790 <13.5 MUY DEC 08.0958 12.6 HSG DEC 07.756 12.7 MUY DEC 09.0979 12.9 HSG ---------------------------------------------------------------------------- 0401+50 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 NOV 26.4479 <15.0 HSG DEC 08.1021 13.2 HSG DEC 05.795 <13.7 MUY DEC 09.1035 13.4 HSG DEC 07.761 13.6 MUY ---------------------------------------------------------------------------- 0418-13 AH ERIDANI The dwarf nova type cataclysmic variable AH ERI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 07.4910 <15.0 SRX DEC 08.7014 13.9 SRX DEC 08.4826 13.9 SRX DEC 09.4819 14.0 SRX DEC 08.5146 13.9 SRX ---------------------------------------------------------------------------- 0523-03 V1159 ORIONIS The dwarf nova type (SU UMA subclass) cataclysmic variable V1159 ORI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 08.4840 14.8 SRX DEC 09.4799 13.7 SRX ---------------------------------------------------------------------------- 0744-23 BV PUPPIS The dwarf nova type (SS CYG subclass) cataclysmic variable BV PUP appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 28.6938 <14.6 SRX DEC 08.4972 13.6 SRX DEC 07.4951 13.6 SRX DEC 09.5021 13.6 SRX ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 05.2900 15.83 CCDV ZRE DEC 08.7104 13.3: SRX DEC 07.07 12.5 GRL ---------------------------------------------------------------------------- 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 DEC 07.5125 <14.4 SRX DEC 08.6903 13.0 SRX DEC 08.5139 12.8 SRX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The 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 DEC 08.0646 15.1: HSG DEC 09.0708 13.5 HSG ---------------------------------------------------------------------------- 1830+24A CH HERCULIS The dwarf nova type cataclysmic variable CH HER may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials NOV 26.0750 <15.7 HSG DEC 09.0757 15.7: HSG DEC 08.0674 15.3: HSG According to the AAVSO International Database this star is fainter than visual magnitude 16.1 during quiescence. ---------------------------------------------------------------------------- 1854+30 DM LYRAE The dwarf nova type cataclysmic variable DM LYR may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 08.0750 15.0 HSG DEC 09.0799 15.6: HSG According to the AAVSO International Database this star is fainter than visual magnitude 16.0 during quiescence. ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: GRL - B. GRANSLO, NORWAY SRX - R. STUBBINGS, AUSTRALIA HSG - G. HANSON II, USA ZRE - R. ZISSELL, USA MUY - E. MUYLLAERT, BELGIUM 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 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! ____________________________________________________________________________