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: 0139+37 AR AND 1640+25 AH HER No. 900 0217+70 AM CAS 1953+77 AB DRA January 21, 2002 0611+15 CZ ORI 2158+41 BL LAC 0804+28 YZ CNC ---------------------------------------------------------------------------- 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 JAN 13.7664 16.04 CCD DRG JAN 19.0229 12.6 SXN JAN 14.0 <14.5 CGF JAN 19.2110 12.2 BTH JAN 15.7949 <13.9 MGH JAN 20.0347 12.3 SXN JAN 17.3221 <13.6 LMK JAN 20.2755 12.3 LMK JAN 17.8760 <13.1 MGH JAN 20.9791 12.5 CGF JAN 18.2242 <13.6 BTH ---------------------------------------------------------------------------- 0217+70 AM CASSIOPEIAE The dwarf nova type (Z CAM subclass) cataclysmic variable AM CAS appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 12.875 15.56 CCD DRG JAN 16.3305 <13.7 LMK JAN 13.3464 <15.0 LMK JAN 20.1041 14.3 SXN JAN 14.1000 <14.5 CGF JAN 20.9673 12.8 CGF ---------------------------------------------------------------------------- 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 17.9989 <15.3 PYG JAN 19.6209 12.3 NLX JAN 18.2507 <14.4 BTH JAN 20.0798 12.5 SXN JAN 19.0750 12.5 SXN JAN 20.8964 12.4 BXV JAN 19.2326 12.7 BTH JAN 20.8964 12.4 BXV JAN 19.5819 12.6 NLX ---------------------------------------------------------------------------- 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 JAN 15.9100 14.2 PYG JAN 21.3297 12.3 LMK JAN 18.0090 14.2 PYG JAN 21.7651 12.0 GUN JAN 18.1208 13.6 TSC ---------------------------------------------------------------------------- 1640+25 AH HERCULIS The dwarf nova type (Z CAM subclass) cataclysmic variable AH HER is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 18.2039 13.9 GUN JAN 20.2059 12.3 GUN JAN 19.2050 12.8 GUN JAN 21.2047 11.4 GUN ---------------------------------------------------------------------------- 1953+77 AB DRACONIS The dwarf nova type (Z CAM subclass) cataclysmic variable AB DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 15.7919 14.7 PYG JAN 20.9667 13.5 CGF ---------------------------------------------------------------------------- 2158+41 BL LACERTAE The variable BL LAC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JAN 15.7839 15.2 PYG JAN 20.0041 13.5 SXN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BTH - T. BURROWS, USA MGH - H. MCGEE, ENGLAND BXV - X. BROS, SPAIN NLX - P. NELSON, AUSTRALIA CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND DRG - R. DIETHELM, SWITZERLAND SXN - M. SIMONSEN, USA GUN - J. GUNTHER, FRANCE TSC - S. TRACY, USA LMK - M. LINNOLT, 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! ____________________________________________________________________________