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: 0640-16 HL CMA 1617+19B V589 HER No. 1164 0725+06 SV CMI 1640+25 AH HER May 27, 2003 0725-19 CL PUP 1723-42 MM SCO 0741-12 UY PUP 1841+37 AY LYR 0803+62 SU UMA 1910-26 V729 SGR 0814+73 Z CAM 1953+77 AB DRA 0822+25 AT CNC 2023+43 V503 CYG 0945-23 AG HYA 2043+41 V516 CYG 1612-54 HP NOR ---------------------------------------------------------------------------- 0640-16 HL CANIS MAJORIS The dwarf nova type (Z CAM subclass) cataclysmic variable HL CMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 21.3660 <13.0 MTH MAY 25.3580 11.9 SRX MAY 22.3889 11.7 MTH MAY 25.3660 11.7 MTH MAY 23.3646 11.4 MTH MAY 26.3630 12.1 SRX MAY 24.3600 11.8 SRX MAY 26.3660 12.0 MTH MAY 24.3660 11.5 MTH MAY 27.3760 <12.2 SRX ---------------------------------------------------------------------------- 0725+06 SV CANIS MINORIS The dwarf nova type (Z CAM subclass) cataclysmic variable SV CMI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.3510 <14.4 SRX MAY 24.3778 13.7 MTH MAY 18.4021 <14.3 MTH MAY 25.3640 13.4 SRX MAY 21.3778 <13.8 MTH MAY 25.3833 13.3 MTH MAY 22.4007 <13.8 MTH MAY 26.2965 13.3 LMK MAY 23.3792 <14.3 MTH MAY 26.3650 13.4 SRX MAY 24.3620 13.6 SRX MAY 26.3792 13.4 MTH ---------------------------------------------------------------------------- 0725-19 CL PUPPIS The variable CL PUP appears to be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 05.4190 14.9 SRX MAY 24.3750 14.0 SRX MAY 06.3930 <14.4 SRX MAY 25.3610 14.0 SRX MAY 18.3560 14.0 SRX MAY 26.3690 14.4 SRX ---------------------------------------------------------------------------- 0741-12 UY PUPPIS The dwarf nova type (POSSIBLE Z CAM subclass) cataclysmic variable UY PUP may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 05.4200 15.1 SRX MAY 26.2917 14.2 LMK MAY 06.3950 <14.6 SRX MAY 26.3690 14.8 SRX MAY 18.3570 <14.6 SRX MAY 27.3860 14.8 SRX MAY 25.3630 14.8 SRX ---------------------------------------------------------------------------- 0803+62 SU URSAE MAJORIS The dwarf nova type (SU UMA subclass prototype) cataclysmic variable SU UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 21.0931 15.01 CCDV GKA MAY 25.8840 12.9 OJR MAY 21.1729 14.9 SXN MAY 25.9302 12.3 BXA MAY 22.0889 <14.1 TDB MAY 26.1778 12.2 SXN MAY 22.1979 14.9 SXN MAY 26.3417 12.6 LMK MAY 23.1007 <14.8 TDB MAY 27.1292 13.6 TDB MAY 24.9340 13.1 PYG ---------------------------------------------------------------------------- 0814+73 Z CAMELOPARDALIS The dwarf nova type (Z CAM subclass prototype) cataclysmic variable Z CAM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 20.1181 13.2 CGF MAY 24.9530 10.7 SJZ MAY 21.1632 <12.5 MKE MAY 25.8854 10.9 OJR MAY 21.1688 12.9 SXN MAY 25.8923 10.9 OCR MAY 22.1958 13.0 SXN MAY 26.1271 10.5 CMP MAY 22.9170 12.4 SJZ MAY 26.1764 10.6 SXN MAY 22.9170 12.4 SJZ MAY 26.3444 10.9 LMK MAY 24.8708 10.8 KWO MAY 27.0069 10.7 OCR MAY 24.9380 10.6 PYG ---------------------------------------------------------------------------- 0822+25 AT CANCRI The dwarf nova type (Z CAM subclass) cataclysmic variable AT CNC may be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 20.0583 <13.4 SWT MAY 24.3700 13.7 SRX MAY 20.1118 14.1: CGF MAY 25.3810 13.6 SRX MAY 22.1028 14.81 CCDV GKA MAY 26.3720 13.6 SRX ---------------------------------------------------------------------------- 0945-23 AG HYDRAE The dwarf nova type cataclysmic variable AG HYA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.3810 <15.0 SRX MAY 26.3042 14.3 LMK MAY 24.3750 <15.0 SRX MAY 26.3670 14.4 SRX MAY 25.3780 14.4 SRX MAY 27.3780 14.4 SRX ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 24.4010 <14.0 SRX MAY 26.4100 13.4 SRX MAY 25.4110 13.9 SRX ---------------------------------------------------------------------------- 1617+19B V589 HERCULIS The dwarf nova type cataclysmic variable V589 HER may be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 23.1618 <15.0 TDB MAY 27.1708 14.5 SXN MAY 24.9780 <15.5 PYG MAY 27.1792 <14.4 TDB MAY 26.2167 <14.8 SXN ---------------------------------------------------------------------------- 1640+25 AH HERCULIS The dwarf nova type (Z CAM subclass) cataclysmic variable AH HER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 23.1660 13.7 TDB MAY 25.9326 13.2 OJR MAY 23.9965 13.6 GCO MAY 26.2188 13.4 SXN MAY 24.3035 <13.6 AAP MAY 27.0138 12.8 OCR MAY 24.9730 13.5 PYG MAY 27.1729 13.0 SXN MAY 25.9111 <12.8 OCR MAY 27.1819 12.9 TDB ---------------------------------------------------------------------------- 1723-42 MM SCORPII The dwarf nova type cataclysmic variable MM SCO appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 12.7390 <14.4 SRX MAY 26.5760 13.9 SRX MAY 24.5400 <14.0 SRX MAY 27.4990 13.9 SRX MAY 26.4220 14.0 SRX ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 25.9431 <14.0 OJR MAY 27.2292 13.2 TDB MAY 26.2313 <15.3 SXN MAY 27.4097 13.1 BJS MAY 27.1875 13.1 SXN MAY 27.4208 13.1 LMK ---------------------------------------------------------------------------- 1910-26 V729 SAGITTARII The dwarf nova type cataclysmic variable V729 SGR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 12.7330 <14.4 SRX MAY 25.6110 13.4 SRX MAY 23.5800 <14.0 SRX MAY 26.5870 13.0 SRX MAY 24.5440 <14.4 SRX MAY 27.5350 13.2 SRX ---------------------------------------------------------------------------- 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 MAY 24.9650 14.6 PYG MAY 25.9535 <14.1 OJR MAY 25.8993 <13.1 OCR MAY 27.0104 12.7 OCR ---------------------------------------------------------------------------- 2023+43 V503 CYGNI The dwarf nova type (SU UMA subclass) cataclysmic variable V503 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 23.2778 <15.0 TDB MAY 27.2833 14.4 TDB MAY 25.0280 <15.6 PYG ---------------------------------------------------------------------------- 2043+41 V516 CYGNI The dwarf nova type (SS CYG subclass) cataclysmic variable V516 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 15.0320 <15.0 PYG MAY 25.0260 13.8 PYG MAY 23.2750 13.8 TDB MAY 27.2806 13.9 TDB ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: AAP - A. ABBOTT, CANADA MTH - H. MATSUYAMA, JAPAN BJS - J. BEDIENT, USA OCR - C. OTTEN, BELGIUM BXA - A. BARANSKY, UKRAINE OJR - J. OSORIO, SPAIN CGF - G. CHAPLE JR., USA PYG - G. POYNER, ENGLAND CMP - R. CAMPBELL, USA SJZ - J. SPEIL, POLAND GCO - C. GUALDONI, ITALY SRX - R. STUBBINGS, AUSTRALIA GKA - K. GRAHAM, USA SWT - R. STEWART, USA KWO - W. KRIEBEL, GERMANY SXN - M. SIMONSEN, USA LMK - M. LINNOLT, USA TDB - D. TAYLOR, CANADA MKE - R. MANSKE, 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 Gamze Menali, 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! ____________________________________________________________________________