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: 1012+41 SN 1999gi 1918+04 V1494 AQL No. 543 0058+40 RX AND 2025-56 TT IND December 10, 1999 0750-24 BX PUP 1841+37 AY LYR ---------------------------------------------------------------------------- 1012+41 SUPERNOVA 1999gi IN NGC 3184 We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular 7329 - http://cfa-www.harvard.edu/iau/cbat.html) that S. Nakano, Sumoto, Japan, reports that Reiki Kushida, Yatsugatake South Base Observatory (YSBO), Japan, discovered a supernova in NGC 3184 on Dec. 9.82 UT at CCD unfiltered magnitude 14.5, using a 0.40-m reflector. A precise position of SN 1999gi, which is 3.5" west and 60.5" north of the center of the galaxy, was obtained by Y. Kushida, YSBO, from R. Kushida's CCD image and reported by Nakano (IAU Circular 7329) as: R.A. = 10h 18m 16.66s Decl.= +41 degrees 26' 28.2" (Equinox 2000.0) For more information and a chart please see AAVSO Alert Notice 267 which will be avaialable later today through the AAVSO web site at the follwing address: http://www.aavso.org Congratulations to Reiki Kushida on her latest discovery! ---------------------------------------------------------------------------- 0058+40 RX ANDROMEDAE The dwarf nova type (Z CAM subclass) cataclysmic variable RX AND is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 07.823 13.9 MUY DEC 08.9618 <13.3 MDP DEC 07.904 13.7 PYG DEC 08.9910 14.2 BRJ DEC 08.0715 13.4 KB DEC 09.75 <13.1 RCH DEC 08.0757 13.6 MKJ DEC 09.854 13.7 MUY DEC 08.1840 13.8 SXN DEC 09.9979 13.5 BRJ DEC 08.8438 14.0 DPV DEC 10.0618 13.0 KB DEC 08.96 13.2 DGP DEC 10.0965 13.4 MKJ ---------------------------------------------------------------------------- 0750-24 BX PUPPIS The dwarf nova type (Z CAM subclass) cataclysmic variable BX PUP may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 05.6813 <14.8 SRX DEC 09.5514 14.4 SRX ---------------------------------------------------------------------------- 1841+37 AY LYRAE The dwarf nova type (SU UMA subclass) cataclysmic variable AY LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 07.734 <15.0 PYG DEC 09.0201 <13.9 SXN DEC 07.8111 <15.3 JCN DEC 09.9688 12.9 BRJ DEC 08.0625 <14.2 KB DEC 09.98 13.5 DGP DEC 08.7639 <14.2 DPV DEC 10.0556 13.0 KB DEC 08.97 <14.6 BRJ ---------------------------------------------------------------------------- 1918+04 V1494 AQUILAE The recent bright nova V1494 AQL continues to fade very slowly, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 07.6264 5.9 GJJ DEC 09.7375 5.4 JCN DEC 07.7027 5.6 GJJ DEC 09.751 6.0 PYG DEC 07.7167 5.9 GJJ DEC 09.766 5.8 PLI DEC 07.7729 6.2 GJJ DEC 09.9100 5.9 TYS DEC 07.9458 5.4 MTM DEC 09.9306 6.2 DPL DEC 08.6771 6.4 GJJ DEC 09.9493 5.9 MKJ DEC 08.705 5.9 AGI DEC 09.9493 5.8 MTM DEC 08.7278 6.3 GJJ DEC 09.9548 6.0 MGQ DEC 08.7590 6.2 GJ DEC 09.9583 5.8 KS DEC 08.9583 5.8 KS DEC 09.9583 5.9 MHI DEC 08.9742 5.7 MTM DEC 09.9646 6.0 BRJ DEC 08.9854 5.8 MKJ DEC 09.9771 5.8 BVE DEC 09.0000 5.8: AWI DEC 09.9875 6.0 BRJ DEC 09.0069 5.7 SXN DEC 09.9929 5.8 WEO DEC 09.0100 5.8 PFJ DEC 10.0000 5.9: AWI DEC 09.474 5.9 GUS DEC 10.0100 6.0 PFJ DEC 09.649 6.0 TUB DEC 10.0153 6.0 BRJ DEC 09.6576 5.6: KMI DEC 10.0243 6.0 DLA DEC 09.6646 6.0 SBX DEC 10.0486 5.9 KB DEC 09.69 6.1 BLP DEC 10.0799 5.9 JRA DEC 09.694 6.0 TUB DEC 10.125 6.1 LMK DEC 09.6970 5.9 BXA DEC 10.69 6.1 BLP DEC 09.73 6.2 CMH DEC 09.733 6.1 FMC ---------------------------------------------------------------------------- 2025-56 TT INDI The dwarf nova type (Z CAM subclass) cataclysmic variable TT IND may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials DEC 01.45 <14.6 WPX DEC 09.5368 13.0 SRX DEC 06.4694 <14.0 SRX ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: *** KMI - M. KUZMIN, RUSSIA AGI - G. ARCURI, ITALY KS - J. KNOWLES, USA AWI - W. ANTHONY, USA LMK - M. LINNOLT, USA BLP - P. BRLAS, HUNGARY MDP - P. MCDONALD, CANADA BRJ - J. BORTLE, USA MGQ - G. MENALI, USA BVE - E. VAN BALLEGOY, NETHERLANDS MHI - H. MENALI, USA BXA - A. BARANSKY, UKRAINE MKJ - J. MCKENNA, USA CMH - M. CHAPELET, FRANCE MUY - E. MUYLLAERT, BELGIUM DGP - G. DYCK, USA PFJ - F. PRICE, USA DLA - A. DILL, USA PLI - L. PARMEGGIANI, FRANCE DPL - P. DOMBROWSKI, USA PYG - G. POYNER, ENGLAND DPV - P. DUBOVSKY, SLOVAKIA RCH - C. RAMILLON, FRANCE FMC - M. FRANGEUL, FRANCE SBX - A. SONKA, ROMANIA GJ - J. GOEHRING, USA SRX - R. STUBBINGS, AUSTRALIA GJJ - J. GRNJA, YUGOSLAVIA SXN - M. SIMONSEN, USA GUS - S. GURYANOV, RUSSIA TUB - V. TUBOLY, HUNGARY JCN - C. JONES, ENGLAND TYS - R. TYSON, USA JRA - R. JOHNSON, USA WEO - E. WAAGEN, USA KB - W. KAMINSKI, USA WPX - P. WILLIAMS, NEW ZEALAND 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! ____________________________________________________________________________