cd Filter;
ds9 acisf19004N001_evt2.fits -scale log -bin to 4 &
[1] 26690
import -window "SAOImage ds9" ds9_03_filter_01.png
display < ds9_03_filter_01.png
xpaset -p ds9 bin filter 'energy=2000:7000'
xpaset -p ds9 smooth yes
xpaset -p ds9 smooth radius 4
xpaset -p ds9 cmap grey
xpaset -p ds9 cmap invert
import -window "SAOImage ds9" ds9_03_filter_02.png
display < ds9_03_filter_02.png
xpaset -p ds9 quit
[1]+ Done ds9 acisf19004N001_evt2.fits -scale log -bin to 4