[Date Prev][Date Next][Thread Prev][Thread Next][Search]
[Main Index]
[Thread Index]
[HEASARC Archives]
ASCA Weekly
Dear ASCA users:
I am sending an ASCA observation schedule for the week of November
22-29. In this week, we allocate a Cygnus X-1 observation for long exposure
time of 130 ksec to get precise calibration of PSF at the extended tail beyond
6 arcminutes as functions of energy and position. This in-flight calibration of
PSF at extended part is especially important for the analysis of extended
source (see reports by Takahashi, Markevitch et al. and by Kunieda and Awaki).
Unfortunately, it seems to be difficult at present to prepare such a well
calibrated and reliable PSF timely from the pre-flight calibration data and
lay tracing. Hence I decided to perform this in-flight calibration and
appreciate your consent to this extra-allocation for PSF calibration, even
though this push further a few days the timeline of GO-2 observations.
F. Nagase
-----------------------------------------------------------------------------
A S C A WEEKLY OBSERVATION PLAN
-----------------------------------------------------------------------------
November 22 - 29, 1994:
(ISAS contact scientist: M. Markevitch maxim@astro.isas.ac.jp)
-----------------------------------------------------------------------------
Date MNV Target Tag. Exp. Observation PI or
start name Cat. (ks) Cat. Pri./TC ( PPI/Co-PI)
-----------------------------------------------------------------------------
11/22 8:00 A 773 CG 40 JPN 1/n S. Miyoshi
11/23 8:10 Cyg X-1 Bin. 130 MOT Cal ASCA team
11/26 19:10 A 959 CG 35 JUS 1/n T. Tsuru
11/27 15:50 MRC 0625-536 AGN 20 ESJ 2/n W. Brinkman
11/28 7:40 GS 0834-430 Bin. 20 USJ 2/n L. Bildsten
11/28 19:00 A 754 CG 20 US 2/n M. Henriksen
(11/29 7:50 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: Manager's observatory time