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: 1749-19 N? SGR 00 1338-07 HS VIR No. 573 0641+28 IR GEM 1723-46 AT ARA February 10, 2000 0804+28 YZ CNC ---------------------------------------------------------------------------- 1749-19 N? SGR 00 - POSSIBLE NOVA IN SAGITTARIUS We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 7362), that Yukio Sakurai, Japan, discovered a possible nova in Sagittarius at photographic magnitude 10.5 on films taken on February 4.8627 and 4.8631 UT. Yoshio and Reiki Kushida, Japan, imaged the object on Feb. 6.8125 UT and obtained a CCDV magnitude of 10.4. Yoshio measured the position of the object as: R.A. = 17h 55m 09.84s Decl. = -19 degrees 46' 01.0" (epoch 2000) For more information on this discovery, a CCDV image of the object, and an AAVSO "b" scale preliminary chart, please see AAVSO Alert Notice 271 which is available via the AAVSO web page: www.aavso.org Congratulations to Yukio Sakurai on his latest discovery! ---------------------------------------------------------------------------- 0641+28 IR GEMINORUM The dwarf nova type (SU UMA subclass) cataclysmic variable IR GEM appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 09.0236 13.1 BRJ FEB 09.867 12.8 MUY FEB 09.1690 12.60 CCDV ZRE FEB 09.88 11.4 VET FEB 09.4764 13.0 SRX ---------------------------------------------------------------------------- 0804+28 YZ CANCRI The dwarf nova type (SU UMA subclass) cataclysmic variable YZ CNC appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 08.2260 15.44 CCDV ZRE FEB 09.872 13.9 MUY FEB 09.1820 14.81 CCDV ZRE FEB 09.89 13.5 VET FEB 09.4771 <14.2 SRX FEB 10.4590 12.1 SRX ---------------------------------------------------------------------------- 1338-07 HS VIRGINIS The cataclysmic variable HS VIR appears to be bright, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 07.7125 <14.8 SRX FEB 09.7535 14.0 SRX FEB 09.7292 14.0 SRX ---------------------------------------------------------------------------- 1723-46 AT ARAE The dwarf nova type (SS CYG subclass) cataclysmic variable AT ARA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 04.08 <14.2 MLF FEB 09.7431 14.0 SRX FEB 07.7278 <14.0 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA SRX - R. STUBBINGS, AUSTRALIA MLF - L. MONARD, SOUTH AFRICA VET - M. VERDENET, FRANCE MUY - E. MUYLLAERT, BELGIUM 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! ____________________________________________________________________________