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 http://www.aavso.org * * * AAVSO NEWS FLASH * * * Subject: 0207-63 WX HYI 0744-23 BV PUP No. 378 0401+50 FO PER 0804+28 YZ CNC December 23, 1998 0409-71 VW HYI 0945+12 X LEO 0518+00 BI ORI 1207-43 MU CEN ---------------------------------------------------------------------------- PLEASE NOTE: NO NEWS FLASHES FROM DECEMBER 24, 1998 TO JANUARY 4, 1999 The AAVSO Headquarters will be operating with a reduced staff from Thursay, December 24, 1998 to Monday, January 4, 1999, because of vacations scheduled during the holiday season. We will not be issueing any News Flashes during this time (unless extraordinary circumstances arise). The Quick Look file with the reported current observations will be updated and available through the AAVSO web site. We wish you and your loved ones Happy Holiday Season and a very Happy and Prosperous New Year! ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 21.77 <13.7 MLF DEC 23.4729 12.5 SRX DEC 22.4840 14.4 SRX DEC 23.6944 12.5 SRX ---------------------------------------------------------------------------- 0401+50 FO PERSEI The dwarf nova type (UG subclass) cataclysmic variable FO PER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 17.2486 <15.0 HSG DEC 21.844 14.1 MUY DEC 20.786 13.6 MUY ---------------------------------------------------------------------------- 0409-71 VW HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable VW HYI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 19.776 13.7 MLF DEC 21.812 10.0 OB DEC 21.4750 12.0 SRX DEC 21.883 10.2 MLF DEC 21.767 10.5 MLF DEC 22.4625 9.3 SRX DEC 21.769 10.0 OB DEC 23.4750 11.2 SRX ---------------------------------------------------------------------------- 0518+00 BI ORIONIS The dwarf nova type (UG subclass) 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 DEC 18.4882 <15.4 SRX DEC 23.4917 15.4 SRX DEC 22.4812 <15.4 SRX DEC 23.6535 14.8 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 DEC 20.5236 15.0 SRX DEC 22.5056 14.0 SRX DEC 22.4924 14.0 SRX DEC 23.5056 13.8 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 20.6681 <14.2 SRX DEC 22.6410 12.1 SRX DEC 21.854 12.6 MUY DEC 23.6556 12.6 SRX ---------------------------------------------------------------------------- 0945+12 X LEONIS The dwarf nova type (UG subclass) cataclysmic variable X LEO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 20.5889 <14.1 SRX DEC 23.4521 12.7 DKS DEC 22.23 <12.8 KTO DEC 23.6687 12.5 SRX DEC 22.3861 12.5 RR ---------------------------------------------------------------------------- 1207-43 MU CENTAURI The dwarf nova type (SS CYG subclass) cataclysmic variable MU CEN appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 18.6722 14.8 SRX DEC 22.6382 13.2 SRX DEC 20.5688 <14.2 SRX DEC 23.6764 13.0 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DKS - S. DVORAK, USA MUY - E. MUYLLAERT, BELGIUM HSG - G. HANSON II, USA OB - M. OVERBEEK, SOUTH AFRICA KTO - T. KINNUNEN, FINLAND RR - R. ROYER, USA MLF - L. MONARD, SOUTH AFRICA SRX - R. STUBBINGS, AUSTRALIA Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. SEASON'S GREETINGS! Good observing! Janet A. Mattei, Director Kerriann Malatesta, 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! ____________________________________________________________________________