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Дата изменения: Mon Jul 9 04:25:10 2007
Дата индексирования: Sat Dec 22 09:51:00 2007
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XMM-Newton Science Analysis System


espfilt (espfilt-0.8.2) [xmmsas_20070708_1801-7.1.0]

Meta Index / Home Page

Algorithm

   subroutine espfilt
      Read parameters.	
       Call method
        if (method .eq. corner) then 
	 call corner
	 subroutine corner:
	  task evselect (to create object image)
	  task evselect (to create object light curve)
	  task evselect (to create corners image)
	  task evselect (to create corners light curve)
	  call clean_lc
	  subroutine clean_lc:
	   extract columns TIME, RATE from object LC
	   extract columns TIME, RATE from corners LC
	   bin TIME, RATE columns from object LC
	   bin TIME, RATE columns from corners LC
	   smooth RATE column from object LC
	   smooth RATE column from corners LC
	   create histogram from object 
	    find peak of the distibution
	   call gauss_fit 
	   subroutine gauss_fit:
	    find best paramater fit using Marquardt routines:
	    MQM  maximum likelyhood fitting routine 
	    MRQ  compute the matrix elements for Marquard method
	    GFUNCS calculate gaussian function distribution
	    return best fit
	   call write_qdp_fit
	   subroutine write_qdp_fit
	    open QDP output file
	    write header, title information
	    write out count rate histogram
	     overlay selection and fit limits
	    write out FOV lightcurve
	     overlay GTIs
	    write out Corner lightcurve
	     overlay GTIs
	    open ASCII gti.txt file
	     write out GTIs
	   task gtibuild create GTI fits file
	   task evselect create object filtered event list
	   task evselect create object filtered image
	   task evselect create corners filtered event list
	   task evselect create corners filtered image

	Filtered event list, lightcurves, nice qdp plot are generated.
   end espfilt