ASCA weekly

[Fumiaki NAGASE <nagase@astro.isas.ac.jp>]

Dear ASCA users,

I am sending an ASCA short-term observation schedule for the period of
May 1 to May 11.

On April 5 we have met with a two-bit error on one of the on-borad CPU that 
controls GIS sensors (CPU2 of GIS) during SAA passage of ASCA. Unfortunately,
this arised effect to destroy data handling parameters in the memory 
and caused mulfunction in the software that controls GIS data handling.  
By this trouble, data of GIS2 sensor became unusable (GIS3 was all right)
after that time for two days from Saturday to Sunday. During the KSC 
aquisitions of ASCA on April 7 (Sunday night to Monday morning) the  
software for the GIS CPU was reloaded from on-board buffer memory and the 
data handling system for GIS2 has started to function normally after the 
third pass of ASCA at KSC. Details of this event and the correspondence were 
reported by Tashiro and the GIS team (in Japanese). Observations with SIS 
and GIS3 were normally performed and data were obtained during the period.
After the third pass on April 7 all GIS and SIS sensors have been functioning
normally.

F. Nagase


-----------------------------------------------------------------------------
A S C A     WEEKLY  OBSERVATION   PLAN
-----------------------------------------------------------------------------
April  8 - 19	 ver-1 (96/04/3)
(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)
-----------------------------------------------------------------------------
5/ 1	 1:30	Mkn 509  #1	GN	10	JUS	2/Y	M. Matsuoka

5/ 1	12:50	WZ SGE		CV	40	MUJ	2/n	J. Patterson
								 /P. Saraswat
5/ 2	16:10	M82 #7		AGN	10	JPN	2/n	T. Tsuru

5/ 2	22:30	AD Leo #1	Star	20	JUS	2/Y	T. Watanabe

5/ 3	12:10	Mkn 509  #2	AGN	10	JUS	2/Y	M. Matsuoka

5/ 3	20:50	AD Leo #2	Star	60	JUS	2/Y	T. Watanabe

5/ 5	12:40	Mkn 509  #3	AGN	10	JUS	2/Y	M. Matsuoka

5/ 5	19:00	IRAS 20181-224	AGN	50	JPN	1/n	T. Nakagawa

5/ 7	 9:10	Abell 990	CG	40	ESJ	1/n	I. McHardy

5/ 8	10:20	Mkn 509  #4	AGN	10	JUS	2/Y	M. Matsuoka

5/ 8	17:10	PG 1114+445	AGN	50	US	1/n	I. George

5/10	 3:50	RXJ 0658-5557	CG	40	MJU	2/n	Y.Tanaka
								/W.Tucker
5/11	 7:00	Mkn 509  #5	AGN	10	JUS	2/Y	M. Matsuoka

5/11	13:50	M82 #8		AGN	10	JPN	2/n	T. Tsuru

(5/ 1	 1:30	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