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: 1040-51 N VEL 99 1723-46 AT ARA No. 441 0854-24 VZ PYX 1804+67 EX DRA May 24, 1999 0939+52 ER UMA 1831+38 LL LYR 1344+08 CR BOO 1848+26 CY LYR 1612-54 HP NOR ---------------------------------------------------------------------------- 1040-51 N VEL 99 We have been informed by the Central Bureau for Astronomical Telegrams (IAU Circular Numbers 7176 and 7177) that a bright nova was independently discovered by Peter Williams, Heathcote, New South Wales (via S. Lee and A. Pearce), at a visual magnitude of 3.1 on May 22.396 UT and by Alan C. Gilmore, Mount John University Observatory on May 22.451. The coordinates for the nova are R.A. = 10h44m48s.39, Decl. = -52o25'30".7 (equinox 2000). An AAVSO Alert Notice and chart(s) for observing this nova will be issued. The following observations of N VEL 99 have been submitted to the AAVSO: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 20.5 <5.1 FMX MAY 23.054 2.9 VHC MAY 22.3958 3.1 WPX MAY 23.0694 2.8 NTA MAY 22.423 3.0 PEX MAY 23.1042 2.8 VHC MAY 22.435 3.0 PEX MAY 23.1111 2.9 NTA MAY 22.446 3.0 PEX MAY 23.1236 2.9 VHC MAY 22.460 3.0 PEX MAY 23.1562 2.9 NTA MAY 22.469 3.0 PEX MAY 23.240 2.7 DAH MAY 22.4880 3.0 WPX MAY 23.2465 2.9 GAJ MAY 22.4880 3.0 WPX MAY 23.258 2.8 BIV MAY 22.490 3.0 PEX MAY 23.2757 2.9 GAJ MAY 22.519 3.0 PEX MAY 23.3909 2.8 WPX MAY 22.535 2.9 PEX MAY 23.416 2.5 FMX MAY 22.563 2.9 PEX MAY 23.4208 2.8 WPX MAY 22.582 2.9 PEX MAY 23.431 2.9 PEX MAY 22.608 2.9 PEX MAY 23.4458 2.8 WPX MAY 22.625 2.9 FMX MAY 23.482 2.7 PEX MAY 22.637 2.9 PEX MAY 23.508 2.6 PEX MAY 22.652 2.8 PEX MAY 23.551 2.6 PEX MAY 22.692 2.9 PEX MAY 23.616 2.7 PEX MAY 22.720 2.9 PEX MAY 23.632 2.6 MMZ MAY 22.770 3.1 OB MAY 23.632 2.6 MMZ MAY 22.9375 2.7 PLA MAY 23.8924 2.8 AAA MAY 22.9479 3.1 NTA MAY 23.8958 3.0 VHC MAY 22.9792 2.8 PLA MAY 23.9167 2.9 NTA MAY 22.985 2.8 VHC MAY 23.962 3.0 PLA MAY 22.9965 2.5 NTA MAY 23.976 3.0 VHC MAY 23.011 2.5 VHC MAY 24.004 2.9 AAA MAY 23.0208 2.8 PLA MAY 24.0451 3.0 NTA MAY 23.033 2.8 VHC MAY 24.087 3.0 VHC MAY 23.038 2.9 VHC MAY 24.1076 3.1 LCS MAY 23.047 3.0 VHC MAY 24.1345 3.0 AAA ---------------------------------------------------------------------------- 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 MAY 17.3931 15.2 SRX MAY 19.41 <14.4 WPX MAY 17.4138 14.2 WPX MAY 23.4173 13.1 WPX ---------------------------------------------------------------------------- 0939+52 ER URSAE MAJORIS The dwarf nova type (SU UMA subclass) cataclysmic variable ER UMA appears to be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 21.1028 14.0 BRJ MAY 22.2229 12.8 BTH MAY 21.2306 13.2 BTH MAY 23.2097 12.3 BTH ---------------------------------------------------------------------------- 1344+08 CR BOOTIS The magnetic variable CR BOO appears to be active, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 16.904 <15.1 PYG MAY 18.919 13.8 MUY MAY 16.972 13.9 MGH MAY 22.903 13.9: MUY MAY 16.972 13.9 MGH ---------------------------------------------------------------------------- 1612-54 HP NORMAE The dwarf nova type (Z CAM subclass) cataclysmic variable HP NOR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 19.3806 <14.5 SRX MAY 21.4042 13.0 SRX MAY 19.43 <14.5 WPX MAY 21.810 12.9 PEX MAY 19.704 14.2 PEX MAY 22.668 12.7 PEX ---------------------------------------------------------------------------- 1723-46 AT ARAE The dwarf nova type (SS CYG subclass) cataclysmic variable AT ARA is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 19.0 <13.5 OB MAY 21.928 12.8 MLF MAY 19.4444 14.0 WPX MAY 22.678 12.2 PEX MAY 19.8007 14.0 SRX MAY 23.117 12.0 OB MAY 20.706 13.0 PEX MAY 23.128 12.2 OB MAY 21.4319 13.0 SRX MAY 23.4444 12.2 WPX MAY 21.822 12.9 PEX ---------------------------------------------------------------------------- 1804+67 EX DRACONIS The dwarf nova type (UG+E subclass) 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 MAY 21.2333 16.5 CCDV ZRE MAY 22.938 13.0 MUY MAY 22.893 13.1 MUY MAY 23.917 12.8 MUY MAY 22.906 <13.4 MUY ---------------------------------------------------------------------------- 1831+38 LL LYRAE The dwarf nova type (UG subclass) cataclysmic variable LL LYR is in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.2060 18.09 CCDV ZRE MAY 22.965 14.0 MUY MAY 18.937 <14.4 MUY MAY 22.965 14.0 MUY MAY 19.94 <14.3 KTO MAY 23.3021 13.5 CCDV COO MAY 21.2920 17.31 CCDV ZRE MAY 23.921 13.9 MUY ---------------------------------------------------------------------------- 1848+26 CY LYRAE The dwarf nova type (UG subclass) cataclysmic variable CY LYR may be in outburst, as indicated by the following observations: AAVSO Observer AAVSO Observer UT Mag. Initials UT Mag. Initials MAY 18.2340 16.76 CCDV ZRE MAY 21.94 <13.6 KTO MAY 19.92 <14.2 KTO MAY 23.926 13.5 MUY ---------------------------------------------------------------------------- We thank the following contributors for the data that they have provided for this News Flash: BRJ - J. BORTLE, USA OB - M. OVERBEEK, SOUTH AFRICA BTH - T. BURROWS, USA PEX - A. PEARCE, AUSTRALIA COO - L. COOK, USA PYG - G. POYNER, ENGLAND KTO - T. KINNUNEN, FINLAND SRX - R. STUBBINGS, AUSTRALIA MGH - H. MCGEE, ENGLAND WPX - P. WILLIAMS, NEW ZEALAND MLF - L. MONARD, SOUTH AFRICA ZRE - R. ZISSELL, USA MUY - E. MUYLLAERT, BELGIUM Please monitor these and other variable stars closely and phone-in, fax, or e-mail your observations to the AAVSO. Good observing! Kerriann Malatesta, 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! ____________________________________________________________________________