You didn't think you would get through a Chandra/CIAO demo without seeing CasA, did you?
You have already seen this image before in the Introduction to X-ray Talk (or a version of it). What if you
needed to tweak the image for publication? You can Backup the state of ds9
and Restore it later.
Restore is not guaranteed to be back compatible.
If you want to make your own
download_chandra_obsid 4638 evt2
dmcopy acisf04638N003_evt2.fits"[x=3580.5:5072.5,y=3148.5:4640.5]" crop.evt
dmcopy "crop.evt[bin sky=4][energy=0:200]" outfile="0-p"
dmcopy "crop.evt[bin sky=4][energy=200:500]" outfile="1-r"
dmcopy "crop.evt[bin sky=4][energy=500:850]" outfile="2-o"
dmcopy "crop.evt[bin sky=4][energy=850:1000]" outfile="3-y"
dmcopy "crop.evt[bin sky=4][energy=1000:1200]" outfile="4-g"
dmcopy "crop.evt[bin sky=4][energy=1200:2000]" outfile="5-b"
dmcopy "crop.evt[bin sky=4][energy=2000:3500]" outfile="6-i"
dmcopy "crop.evt[bin sky=4][energy=3500:7000]" outfile="7-v"
dmcopy "crop.evt[bin sky=4][energy=7000:10000]" outfile="8-k"
cd BackupRestore;
/bin/ls -lRF | sed -e s,$USER,user, -e s,$GROUP,group,
.: total 312 -rw-rw-r-- 1 user group 35186 Dec 20 08:23 ds9.bck drwxrwsr-x 11 user group 4096 Dec 20 08:23 ds9.bck.dir/ -rw-r--r-- 1 user group 271092 Dec 27 08:21 ds9_07_backup_01.png ./ds9.bck.dir: total 108 -rw-rw-r-- 1 user group 6912 Dec 20 08:23 0_hotpink4.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 1_firebrick.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 2_darkorange.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 3_gold4.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 4_forestgreen.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 5_steelblue.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 6_mediumpurple4.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 7_orchid4.lut -rw-rw-r-- 1 user group 6912 Dec 20 08:23 8_khaki4.lut drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame1/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame2/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame3/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame4/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame5/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame6/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame7/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame8/ drwxrwsr-x 2 user group 4096 Dec 20 08:23 Frame9/ ./ds9.bck.dir/Frame1: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 0-p -rw-rw-r-- 1 user group 247 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame2: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 1-r -rw-rw-r-- 1 user group 250 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame3: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 2-o -rw-rw-r-- 1 user group 269 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame4: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 3-y -rw-rw-r-- 1 user group 251 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame5: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 4-g -rw-rw-r-- 1 user group 250 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame6: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 5-b -rw-rw-r-- 1 user group 250 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame7: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 6-i -rw-rw-r-- 1 user group 250 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame8: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 7-v -rw-rw-r-- 1 user group 250 Dec 20 08:23 ds9.reg ./ds9.bck.dir/Frame9: total 348 -rw-rw-r-- 1 user group 345600 Dec 20 08:23 8-k -rw-rw-r-- 1 user group 247 Dec 20 08:23 ds9.reg
ds9 -restore ds9.bck &
[1] 31578
import -window "SAOImage ds9" ds9_07_backup_01.png
display < ds9_07_backup_01.png
xpaset -p ds9 quit
[1]+ Done ds9 -restore ds9.bck