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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

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