# cut the image to a smaller size, otherwise the PSF image will be # calculated over an entire 8192x8192 grid. % dmcopy infile="acisf04469_000N002_repro_evt2.fits[bin x=4115.5:4164.5:1,y=4077.5:4126.5:1]" outfile=4469.img % arfcorr infile=4469.img outfile=4469_arfcorr_psf_2.3keV.img x=4140.045 y=4102.3095 energy=2.3 region="circle(4140.045,4102.3095,8)"