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ASCA Weekly 941019-29 revised
Dear ASCA users;
An outburst of the ultrasoft BHC source, EXO 1846-031 was reported from the
GRO BASTE observation (IAUC 6096). Since the source is now in declining
phase and it is now at the very end of the ASCA visible window, we install the
observation of EXO 1846-031 on October 22 for about 10 ksec, by shifting the
previously allocated target S50836+715 (JPN, PI: M. Matsuoka) to the week after
November 10. Although we use the 20 ksec span for S50836+715, the visibility
for EXO 1846-031 is worse at this period and we may get exposure time of
only about 12 ksec. The sun-source angle is also not good (about 75 deg)
and the quality of SIS data will be limitted.
F. Nagase
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A S C A WEEKLY OBSERVATION PLAN
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October 19 - 29 1994:
(ISAS contact scientist: K. Mitsuda, Mitsuda@astro.isas.ac.jp)
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Date MNV Target Tag. Exp. Observation PI or
start name Cat. (ks) Cat. Pri./TC ( PPI/Co-PI)
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10/19 22:20 CF Tuc Star 20 ESJ 2/n M. Kurster
10/20 7:40 U Gem CV 30 US 1/n P. Szkody
10/21 4:20 SN1993J SNR 50 JPN 1/n Y. Tanaka
10/22 7:40 EXO 1846-031 Bin 12 JPN TOO F. Nagase
10/22 18:50 W50 West (P2) SNR 10 JPN 2/n N. Kawai
10/23 3:00 MRC 2019+098 AGN 20 ESJ 2/n W. Brinkman
10/23 18:50 QQ Vul CV 20 USJ 2/n K. Mukai
10/24 11:00 MG 2016+112 CG 80 JPN 2/n T. Takeshima
10/26 17:00 PKS 2149-306 AGN 20 JPN 1/n M. Matsuoka
10/27 6:00 IRAS 20460+192 AGN 40 JPN 2/n Inoue/Ogasaka
10/28 7:40 SS 433 (N1) Bin. 10 JPN 1/Y N. Kawai
10/28 16:50 NGC 6251 AGN 40 US 1/n M. Birkinshow
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(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: Manager's observatory time