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: 1801-27C NOVA? SAGITTARII 200 No. 1142 0206+57A TZ PER April 9, 2003 0207-63 WX HYI 0910+09 GZ CNC 1010+72 CI UMA 1556+33 VW CRB ---------------------------------------------------------------------------- 1801-27C NOVA? SAGITTARII 2003 - POSSIBLE NOVA IN SAGITTARIUS We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 8113) that Hideo Nishimura, Kakegawa, Shizuoka-ken, Japan, discovered a possible nova in Sagittarius on April 8.792 UT at photographic magnitude 9.8, using a 200-mm f/4 camera lens and T-Max 400 film. R. Kushida, Yatsugatake South Base Observatory, Japan, who observed it on Apr. 9.704 UT at 7.6 CCD, gives the following precise position for the object: R.A.= 18h 07m 20.38s Decl. = -27o 24' 31.6" (2000.0) This object may be the Mira variable V4006 Sgr at maximum. There is a discrepancy between the published coordinates for V4006 Sgr and its location shown in the finder chart in the discovery article (J. Lukas, JAAVSO, 4, 2, 64 (1975-1976)). The coordinates given in the fourth edition of the General Catalogue of Variable Stars (GCVS) do not match the location plotted in Lukas. However, the plotted position of V4006 Sgr in Lukas does match the coordinates of the object reported by Nishimura. This situation is being investigated. For now, please use the AAVSO 'd' scale Preliminary chart of 1801-27 V4444 Sgr (date for 5/99) that shows V4006 Sgr to observe the object. The position indicated for V4006 Sgr is that of the object reported as probable nova; what is uncertain is whether the object is actually V4006 Sgr or a new object. Chart information: for web browser printable images http://www.aavso.org/cgi-bin/shrinkwrap.pl?path=/charts/SGR/V4444_SGR/V4444SGR-D.GIF ** IMPORTANT ** Please report your observations of this object as 1801-27C N? SGR 03 and SEND THEM IN AN EMAIL TO THE AAVSO ACCOUNT (aavso@aavso.org) AND NOT TO THE OBSERVATIONS ACCOUNT until we can can clarify if the new object is V4006 Sgr or a nova. DO NOT UPLOAD OBSERVATIONS TO THE QUICK-LOOK FILE USING WEBOBS OR EMAILOBS. If you have a CCD image please send it as an attachment with your report. ---------------------------------------------------------------------------- 0206+57A TZ PERSEI The dwarf nova type (Z CAM subclass) cataclysmic variable TZ PER appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 02.8720 14.3 PYG APR 07.8560 13.8 PYG APR 03.0847 <14.0 DLA APR 08.8610 13.5 PYG APR 05.8440 <14.1 PYG ---------------------------------------------------------------------------- 0207-63 WX HYDRI The dwarf nova type (SU UMA subclass) cataclysmic variable WX HYI appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 04.4130 <14.0 SRX APR 06.4120 <14.0 SRX APR 05.4080 <14.0 SRX APR 09.4210 13.4 SRX ---------------------------------------------------------------------------- 0910+09 GZ CANCRI The dwarf nova type cataclysmic variable GZ CNC may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.8847 <13.5 OJR APR 08.8880 <14.7 PYG APR 07.8850 <15.0 PYG APR 09.4380 13.3 SRX APR 08.3250 <14.9 LMK ---------------------------------------------------------------------------- 1010+72 CI URSAE MAJORIS The dwarf nova type cataclysmic variable CI UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 07.1000 <14.1 CGF APR 08.9140 14.0 PYG APR 07.9080 <15.3 PYG APR 09.0450 14.3 PYG ---------------------------------------------------------------------------- 1556+33 VW CORONAE BOREALIS The dwarf nova type cataclysmic variable VW CRB may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials APR 06.0285 <14.6 GCO APR 08.0060 <15.5 PYG APR 06.9069 <14.0 OJR APR 09.0190 14.4 PYG APR 07.9306 <14.0 OJR ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: CGF - G. CHAPLE JR., USA OJR - J. OSORIO, SPAIN DLA - A. DILL, USA PYG - G. POYNER, ENGLAND GCO - C. GUALDONI, ITALY SRX - R. STUBBINGS, AUSTRALIA LMK - M. LINNOLT, 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! ____________________________________________________________________________