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: 0409-71 VW HYI 0939+52 ER UMA No. 554 0533+26 RR TAU 1120-35 V442 CEN January 7, 2000 0533+60 BY CAM 2107+12 V364 PEG 0611+15 CZ ORI ---------------------------------------------------------------------------- 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 JAN 05.5958 13.5 SRX JAN 07.0570 9.5 DZS JAN 05.748 13.8 MLF JAN 07.1040 9.4 GAJ JAN 06.5333 12.0 SRX JAN 07.4806 9.4 SRX JAN 06.5597 11.8 SRX ---------------------------------------------------------------------------- 0533+26 RR TAURI The variable star RR TAU is bright, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 02.899 13.7 MUY JAN 05.76 12.6 VET JAN 03.76 13.4 VET JAN 05.850 12.8 MUY JAN 03.987 13.3 PYG JAN 06.880 12.0 PYG JAN 04.893 13.2 MUY JAN 06.924 12.7 MUY ---------------------------------------------------------------------------- 0533+60 BY CAMELOPARDALIS The variable star BY CAM appears to be bright, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 04.008 14.7 PYG JAN 06.844 14.2 PYG JAN 06.783 14.0 PYG JAN 06.889 14.2 PYG ---------------------------------------------------------------------------- 0611+15 CZ ORIONIS The dwarf nova type cataclysmic variable CZ ORI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 06.925 <13.9 MUY JAN 07.4917 12.7 SRX JAN 07.1389 13.4 KB ---------------------------------------------------------------------------- 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 JAN 05.2257 14.8: HSG JAN 06.951 13.6 MUY JAN 06.2375 14.7 HSG JAN 07.229 13.5 MUY ---------------------------------------------------------------------------- 1120-35 V442 CENTAURI The dwarf nova type (SS CYG subclass) cataclysmic variable V442 CEN appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 06.5660 <14.0 SRX JAN 07.6514 13.4 SRX JAN 07.5396 14.0 SRX ---------------------------------------------------------------------------- 2107+12 V364 PEGASI The dwarf nova type (possible SU UMA subclass) cataclysmic variable V364 PEG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 04.083 <18.0: CCD SPK JAN 07.097 16.0: CCD SPK JAN 06.095 16.0: CCD SPK ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DZS - S. DOMINGUEZ, ARGENTINA MUY - E. MUYLLAERT, BELGIUM GAJ - J. GARCIA, ARGENTINA PYG - G. POYNER, ENGLAND HSG - G. HANSON, USA SPK - P. SCHMEER, GERMANY KB - W. KAMINSKI, USA SRX - R. STUBBINGS, AUSTRALIA MLF - L. MONARD, SOUTH AFRICA 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! 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! ____________________________________________________________________________