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: 0119+08 SN 2000cx 1608-28 V893 SCO No. 647 0139+37 AR AND 1848+26 CY LYR July 19, 2000 0956+34 RU LMI 2023+43 V503 CYG ---------------------------------------------------------------------------- 0119+08 SUPERNOVA 2000cx IN NGC 524 IN PISCES We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 7458) that C. Yu, M. Modjaz, and W. D. Li, University of California at Berkeley, on behalf of the Lick Observatory Supernova Search, discovered an apparent supernova on July 17.5 UT in NGC 524 at approximate unfiltered CCD magnitude 14.5 using the 0.8-m Katzman Automatic Imaging Telescope (KAIT). They also imaged the apparent supernova on July 18.4 UT at approximate unfiltered CCD magnitude 14.3. A KAIT image of the same field taken on 1998 Aug. 31.4 showed nothing at the position of SN 2000cx down to approximate magnitude 19.5. The position of the new supernova, which is located 23" west and 109.3" south of the nucleus of NGC 524, is reported as: R.A. = 01h 24m 46.15s Decl. = +09 degrees 30' 30.9" (equinox 2000.0) An AAVSO 'f' scale Preliminary chart of NGC 524 showing SN 2000cx has been posted on the AAVSO web site. (http://charts.aavso.org/PRELIM/PSC/NGC_524/) Please use this chart to observe 0119+08 SN 2000CX and report your observations to AAVSO Headquarters. Please be sure to indicate which comparison stars you used to make your observations. Congratulations to C. Yu, M. Modjaz, and W. D. Li, and the rest of the KAIT team on their discovery! ---------------------------------------------------------------------------- 0139+37 AR ANDROMEDAE The dwarf nova type cataclysmic variable AR AND appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 17.068 <14.3 PYG JUL 17.990 12.4 MUY ---------------------------------------------------------------------------- 0956+34 RU LEONIS MINORIS The dwarf nova type cataclysmic variable RU LMI may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 06.1722 <15.1 HSG JUL 18.1236 <13.5 HSG JUL 12.1708 <14.3 HSG JUL 19.1222 14.7: HSG ---------------------------------------------------------------------------- 1608-28 V893 SCORPII The dwarf nova type cataclysmic variable V893 SCO is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 16.581 14.0 SRX JUL 18.732 12.6 MLF JUL 17.398 <13.4 SRX JUL 19.358 12.6 SRX ---------------------------------------------------------------------------- 1848+26 CY LYRAE The dwarf nova type cataclysmic variable CY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 18.1431 <14.8 HSG JUL 18.991 13.9 PYG JUL 18.1493 <14.0 SXN JUL 19.005 13.9 PYG JUL 18.89 13.1 VET JUL 19.1424 13.3 HSG JUL 18.90 13.4 GUN JUL 19.2410 13.3 BTH ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials JUL 18.1521 <15.2 HSG JUL 19.065 14.6 PYG JUL 19.013 14.7 PYG JUL 19.1514 14.8 HSG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BTH - T. BURROWS, USA PYG - G. POYNER, ENGLAND GUN - J. GUNTHER, FRANCE SRX - R. STUBBINGS, AUSTRALIA HSG - G. HANSON II, USA SXN - M. SIMONSEN, USA MLF - L. MONARD, SOUTH AFRICA VET - M. VERDENET, FRANCE MUY - E. MUYLLAERT, BELGIUM 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! ____________________________________________________________________________