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: 0854-24 VZ PYX 1841+43 V344 LYR No. 1147 0939+52 ER UMA 1858+42 V493 LYR April 23, 2003 1730-47 BF ARA 2131+40 V630 CYG 1805-14 UZ SER ---------------------------------------------------------------------------- 0854-24 VZ PYXIDIS The dwarf nova type (SU UMA subclass) cataclysmic variable VZ PYX may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 20.2618 <14.7 LMK APR 22.3870 14.7 SRX APR 20.3740 <14.6 SRX APR 23.4410 12.4 SRX APR 21.3312 <14.5 LMK ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA appears to be brightening, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 20.1278 13.8 CGF APR 21.1000 <14.1 CGF APR 20.2708 <14.2 LMK APR 22.9310 13.7 PYG APR 20.8875 <14.2 VJA APR 23.2590 13.2 AAP ---------------------------------------------------------------------------- 1730-47 BF ARAE The dwarf nova type (SU UMA subclass) cataclysmic variable BF ARA may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 13.7300 <15.0 SRX APR 23.4820 14.6 SRX ---------------------------------------------------------------------------- 1805-14 UZ SERPENTIS The dwarf nova type (POSSIBLE Z CAM subclass) cataclysmic variable UZ SER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 13.7690 <14.4 SRX APR 23.2917 13.2 SXN APR 18.6030 <13.2 SRX APR 23.4583 13.2 LMK ---------------------------------------------------------------------------- 1841+43 V344 LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable V344 LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 11.3618 <15.3 SXN APR 23.3153 14.3 SXN ---------------------------------------------------------------------------- 1858+42 V493 LYRAE The dwarf nova type cataclysmic variable V493 LYR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 11.3639 <15.1 SXN APR 23.3181 14.0 SXN ---------------------------------------------------------------------------- 2131+40 V630 CYGNI The dwarf nova type (POSSIBLE SU UMA subclass) cataclysmic variable V630 CYG appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials FEB 01.7650 <14.9 PYG FEB 09.7770 <14.3 PYG FEB 05.7670 <14.9 PYG APR 23.3861 14.1 SXN ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: AAP - A. ABBOTT, CANADA SRX - R. STUBBINGS, AUSTRALIA CGF - G. CHAPLE JR., USA SXN - M. SIMONSEN, USA LMK - M. LINNOLT, USA VJA - J. VIRTANEN, FINLAND PYG - G. POYNER, ENGLAND Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Gamze Menali, Technical Assistant on behalf of Janet A. Mattei, Director ____________________________________________________________________________ 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! ____________________________________________________________________________