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: 0748+63 HT CAM No. 621 2138+43 SS CYG May 16, 2000 ---------------------------------------------------------------------------- 0748+63 HT CAMELOPARDALIS The cataclysmic variable HT CAM appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 12.976 <15.0 RMQ MAY 15.919 13.2 SPK MAY 14.895 <13.7 SPK MAY 15.967 13.0 SPK MAY 14.898 <14.8 PYG ---------------------------------------------------------------------------- 2138+43 SS CYGNI The dwarf nova type (SS CYG subclass prototype) cataclysmic variable SS CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 13.0280 12.2 SJZ MAY 15.9271 10.6 DPV MAY 13.4188 12.2 HSG MAY 15.965 10.8 SPK MAY 13.965 11.7 RMQ MAY 16.01 10.6 GRL MAY 13.9688 11.9 DPV MAY 16.0370 10.2 SJZ MAY 14.01 12.0 GRL MAY 16.049 10.5 SPK MAY 14.9902 11.8 SCZ MAY 16.097 10.4 SPK MAY 15.00 11.5 GRL MAY 16.2060 9.61 CCDV ZRE MAY 15.014 12.0 SPK MAY 16.2640 9.47 CCDV ZRE MAY 15.0400 11.6 SJZ MAY 16.3050 9.35 CCDV ZRE MAY 15.2722 11.5 KMA MAY 16.3271 9.2 KMA MAY 15.3310 11.44 CCDV ZRE MAY 16.3480 9.23 CCDV ZRE ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: DPV - P. DUBOVSKY, SLOVAKIA RMQ - M. RESZELSKI, POLAND GRL - B. GRANSLO, NORWAY SCZ - E. SCHWEITZER, FRANCE HSG - G. HANSON II, USA SJZ - J. SPEIL, POLAND KMA - M. KOMOROUS, CANADA SPK - P. SCHMEER, GERMANY PYG - G. POYNER, ENGLAND ZRE - R. ZISSELL, 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! ____________________________________________________________________________