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: 1801-27B V4006 SGR - NO NEW NOVA IN SGR No. 1143 0547-05 CN ORI 1102-55 V342 CEN April 10, 2003 0605+47 SS AUR 1804+67 EX DRA 0905+51 DI UMA ---------------------------------------------------------------------------- 1801-27B V4006 SGR - NO NEW NOVA IN SGR Based on images obtained by B. Gary and J.D. West and received by the AAVSO, and as announced in IAU Circular 8115, the possible nova mentioned in IAUC 8113 and in AAVSO News Flash No. 1142 is, in fact, the variable star V4006 Sgr near maximum. V4006 Sgr is a Mira type variable with a 281-day period and an epoch at JD 2437846. This variable was discovered on photographic plates at Maria Mitchell Observatory (Nantucket, MA) and studied by Joan Lukas with results and a finder chart published in the Journ. AAVSO, Vol. 4, pg. 64; 1975-1976. V4006 Sgr appears in the field of the 1999 nova, 1801-27 V4444 Sgr. New 'd' and 'e' scale AAVSO charts for this variable have been posted on the AAVSO web site. These charts include a revised sequence, so please download and use the new charts to observe V4006 Sgr. http://charts.aavso.org/ ---------------------------------------------------------------------------- 0547-05 CN ORIONIS The dwarf nova type (Z CAM subclass) cataclysmic variable CN ORI is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 06.1215 15.40 CCDV GKA APR 10.0556 <13.7 TDB APR 06.2854 15.3 LMK APR 10.4139 13.6 MTH APR 09.4056 <13.7 MTH APR 10.4260 13.2 SRX APR 09.4190 <13.8 SRX ---------------------------------------------------------------------------- 0605+47 SS AURIGAE The dwarf nova type cataclysmic variable SS AUR appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.8920 15.5 PYG APR 10.0569 <14.6 TDB APR 08.8540 <14.0 MGH APR 10.0889 14.47 CCDV GKA APR 08.8900 <15.2 PYG APR 10.0896 14.3 SXN APR 09.9220 <14.6 PYG APR 10.1590 14.0 SXN ---------------------------------------------------------------------------- 0905+51 DI URSAE MAJORIS The dwarf nova type cataclysmic variable DI UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.0410 15.82 CCDV WGR APR 09.8910 <15.3 PYG APR 07.9060 <15.5 PYG APR 10.1729 15.0 SXN APR 08.9120 <15.3 PYG ---------------------------------------------------------------------------- 1102-55 V342 CENTAURI The dwarf nova type cataclysmic variable V342 CEN appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 05.4060 <15.0 SRX APR 09.4330 <14.6 SRX APR 06.4330 <14.8 SRX APR 10.4510 14.6 SRX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The eclipsing dwarf nova type cataclysmic variable EX DRA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 08.0250 15.5 PYG APR 10.2243 14.5 SXN APR 09.0340 <15.1 PYG ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: GKA - K. GRAHAM, USA SRX - R. STUBBINGS, AUSTRALIA LMK - M. LINNOLT, USA SXN - M. SIMONSEN, USA MGH - H. MCGEE, ENGLAND TDB - D. TAYLOR, CANADA MTH - H. MATSUYAMA, JAPAN WGR - G. WALKER, USA 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! 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! ____________________________________________________________________________