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: 1833-33 V4745 SGR (N SGR 03) No. 1152 0641+28 IR GEM 0939+52 ER UMA April 29, 2003 0814+73 Z CAM 1612-54 HP NOR ---------------------------------------------------------------------------- 1833-33 V4745 SGR (N SGR 03) AAVSO b scale charts for the new nova V4745 Sgr have been posted on the AAVSO web site at the following url: http://www.aavso.org/charts/standard/SGR/V4745_SGR/ Due to the scale of this new chart, CCD observers will have to utilize the CCD images located at the following url to observe the new nova: http://www.aavso.org/nsgr03.stm ---------------------------------------------------------------------------- 0641+28 IR GEMINORUM The dwarf nova type (SU UMA subclass) cataclysmic variable IR GEM is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 25.0750 14.68 CCDV ZRE APR 27.3090 15.6: LMK APR 25.1000 <13.7 CGF APR 29.0650 12.52 CCDV ZRE APR 26.1000 <13.7 CGF APR 29.0854 12.4 CGF APR 26.3920 <12.0 SRX ---------------------------------------------------------------------------- 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 APR 25.1000 13.3 CGF APR 27.2465 13.0 LMK APR 26.2681 13.0 SXN APR 27.8479 12.9 CPS APR 26.8514 12.9 CPS APR 28.9150 12.1 PYG APR 26.8924 13.1 OJR APR 29.1139 11.5 CGF APR 27.1944 13.1 SXN ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 26.2764 <14.2 SXN APR 28.1014 12.8 TSC APR 27.1854 14.4 TDB APR 28.1896 13.3 TDB APR 27.2076 14.8 SXN APR 28.9220 12.7 PYG APR 27.3736 13.2 LMK APR 29.1174 12.5 CGF ---------------------------------------------------------------------------- 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 APR 24.4390 <14.0 SRX APR 27.5290 13.1 SRX APR 25.4560 14.0 SRX APR 28.4550 12.8 SRX APR 25.4560 14.0 SRX APR 29.4490 12.7 SRX APR 26.4420 13.4 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. CHAPLE JR., USA SRX - R. STUBBINGS, AUSTRALIA CPS - P. CLOESEN, BELGIUM SXN - M. SIMONSEN, USA LMK - M. LINNOLT, USA TDB - D. TAYLOR, CANADA OJR - J. OSORIO, SPAIN TSC - S. TRACY, USA 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! ____________________________________________________________________________