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ASCA weekly



Dear ASCA users:

I am sending an ASCA observation schedule for the period of May 8 - 18.
The 29-ksec exposure of Cyg X-1 is a supplemental observation for the
XRT PSF (point spread function) calibration. A plan of ASCA calibration
observations hereafter during the AO3 period is attached below the weekly
shcedule. We also include an AO2 hold-over target, X2127+119.

I also attached a list of supplemental observation targets. This listing
is based on the observation journal recently released. I have searched 
targets real exposure time significantly smaller than the approved
time upto the end of February 1995with and listed those targets which 
need more than 5 ksec additional exposure (No supplement is planned for
time critical (coordinated simultaneous) observations even if the achieved 
exposure is significantly smaller than the approved exposure time).


F. Nagase

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A S C A     WEEKLY  OBSERVATION   PLAN
-----------------------------------------------------------------------------
 May 8 - 19,   1995;     	
(ISAS contact scientist:   M. ITOH     itoh@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)
-----------------------------------------------------------------------------
5/ 8 	13:30 	RX10131+505 p.3	AGN	40	JPN	1/n	A. Yamashita

5/ 9	13:20	Cyg X-1 (suppl)	Bin.	20	MOT	CAL	ASCA Team

5/10	 2:40	NGC 4151	AGN	100	JPN	2/n	T. Mihara

5/12	12:10	V444 Cyg  p.1	Star	15	JPN	1/Y	Y. Maeda

5/12	21:30	NGC7172		AGN	20	ESJ	1/n	R. Svensson

5/12	15:20	V444 Cyg  p.2	Star	10	JPN	1/Y	Y. Maeda
		
5/13	21:30	Cyg Loop East	SNR	20	ESJ	1/n	A. Decourchelle

5/14	13:40	V444 Cyg  p.3	Star	15	JPN	1/Y	Y. Maeda

5/14	23:00	NGC 3227	AGN	40	US	2/n	P. Serlemitsos

5/15	23:10	X2127+119	Bin.	40	MUJ	2/n	Smale/Dotani

5/17	 3:50	TY Pyx(HD77137) Star	40	US	1/Y	D. Huenemoerder

5/18	 2:20	TXFS 1011+144	AGN	40	US	1/n	W. Van Breugel

(5/19	 1:50	to next target)
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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 


----------------------------------
CALIBRATION PLAN DURING AO3 PERIOD
----------------------------------
	(Item)					(target)	(exposure)
------------------------------------------------------------------------------
(1) GIS PSF at extended tail (supplement)	Cyg X-1		20 ks

(2) XRT/GIS performance				Crab nebula	40 ks

(3) XRT contamination (soft X-ray reflectivity)	N132D or E0102	TBD

(4) SIS CTI for 4-CCD mode			Cas A		100 ks

(5) SIS CTI for 2-CCD mode			Cas A		60 ks

(6) SIS CTI for 1-CCD mode			Cas A		40 ks

(7) XRT/GIS extended PSF for soft X-rays	TBD		TBD

(8) XRT/SIS PSF (at r<11')			TBD		TBD
------------------------------------------------------------------------------


----------------------------------------
LIST OF SUPPLEMENTAL OBSERVATION TARGETS 
----------------------------------------
------------------------------------------------------------------------------
Seq No.   Obs.       Target name      Exposure     PI  or    Pri  Appr. Suppl.
          Date                        GIS   SIS   (PPI		  Time  Expo.
          yy mm dd                     (ksec)	   /Co-PI)	  (ks)  (ks)
------------------------------------------------------------------------------
41017010  94 04 26   LMC_X-4          20.0  12.2  Nagase      2   20	10  
						  /Clark       
82045000  94 08 20   ABELL_2204       20.2  17.6  White	      2   40	20   
72025000  94 09 03   ESO103-G35       21.3  18.8  K.Leighly   1   40	19  
52003010  94 11 15   CYGNUS_LOOP #7    4.3   4.3  E.Miyata    2   10	 6
          94 11 16   CYGNUS_LOOP #9    0.0   0.0  E.Miyata    2   10	10
72020000  94 11 19   RE1034+39        33.0  31.6  K.Pounds    1   40	 7
73078000  95 01 14   B1422+231        27.7  25.2  Bechtold    1   40	12
						  /Iwasawa    
43002000  95 01 31   GS1124-68        30.7  23.5  Y.Tanaka    1   40	 9  
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