Dear ASCA users, An ASCA TOO observation of the new X-ray transient, XTE J1859+226, requested by M. McCollough was accepted. We allocate a 20-ksec observation of the source on October 23, by reducing the exposure time of the priority-C target, CTB 80 Shell, from 60 ksec to 40 ksec. I have tentatively assigned Drs. N. Kawai and Y. Ueda as Japanese CoIs. F. Nagase ----------------------------------------------------------------------------- A S C A WEEKLY OBSERVATION PLAN ----------------------------------------------------------------------------- #26: October 22 - November 4, 1999 ver. 2 (99/10/20) (ISAS contact scientist: Y. UEDA (ueda@astro.isas.ac.jp) ----------------------------------------------------------------------------- Date MNV Target Tag. Exp. Observation PI or start name Cat. (ks) Cat. Pri./TC ( PPI/Co-PI) ----------------------------------------------------------------------------- 10/22 14:00 WR 140 Star 20 US 1/n M. Corcoran 10/23 5:40 XTE J1859+226 Bin. 20 TOO 1/Y M. McCollough 10/23 16:40 CTB 80 Shell SNR 40 MUJ 3/n S.Safi-Harb /J. Hiraga 10/24 16:30 ER Vul Star 100 MUJ 1/Y A Brown /TBD 10/27 11:00 MCG-05-18-002 AGN 40 MUJ 1/n E. Moran /H. Awaki 10/28 14:20 G65.7+1.2 SNR 20 MUJ 2/n J. Hughes /M. Sakano 10/29 6:20 WR 133 N2 Star 20 USJ 2/n G. Garmire 10/29 19:00 24 Uma Star 20 ESJ 3/n M. Huensch 10/30 7:40 PG 2112+059 AGN 40 MUJ 3/n W. Brandt /N. Iyomoto 10/31 11:50 H1318+692 AGN 20 JPN 2/n Y. Ogasaka 11/ 1 0:50 0520-69.4 SNR 30 MUJ 2/n J. Hughes /M. Nishiuchi 11/ 1 18:10 SN1987A SNR 100 JPN 1/n M. Itoh (11/ 4 7:40 MNV to next target) ----------------------------------------------------------------------------- (Note) Obs. Cat. JPN: Japan time, US: US time, JUS: Japan-US Collaboration, USJ: US-Japan Collaboration, MJU: Merged Japan-US (PPI=Japan), MUJ: Merged US-Japan (PPI=US), ESJ: ESA-Japan Program, MOT: Observatory Time (Calibration, maintenance), and TOO: Target of Opportunity