grid.py : python program to generate grid files uses sherpa under ciao ver 4.3 e.g. this will generate a grid file in the fits format (output.qgrid.fits) and sherpa script used to calculate grid for reference (sherpa_grid.sph). grid.py \ --rmf=example.rmf \ --arf=example.arf \ --fits=output.qgrid.fits \ --model="xsphabs.A*xspowerlaw.B" \ --par1=A.nH:0.01,0.1,0.4,1,4,10:200 \ --par2=B.PhoIndex:0,1,2,3,4:200 \ --etcp=B.norm:1.0 --range=0.3,8.0 example.pro : an idl program to plot grids using qdplot2.pro (warning: not polished yet)