ds9
works with both FITS binary tables, ie Event files, as well as images.
When ds9
reads an event file, it automatically bins the table into an image based on the Bin parameters.
Users can Zoom or Block images.
cd Basics;
ds9 acisf14022N001_evt2.fits -scale log -pan to 3760 4290 physical -bin factor 2 &
sleep 5
[1] 26218
xpaset -p ds9 bin factor 8
import -window "SAOImage ds9" ds9_02_bbz_01.png
display < ds9_02_bbz_01.png
xpaset -p ds9 bin factor 0.5
import -window "SAOImage ds9" ds9_02_bbz_02.png
display < ds9_02_bbz_02.png
Applies to image or table. Resamples image array, ie Zoom by 2, displays each row & column twice. Zoom by 0.5 only displays every other row and column.
xpaset -p ds9 bin factor 1
xpaset -p ds9 zoom to 8
import -window "SAOImage ds9" ds9_02_bbz_03.png
display < ds9_02_bbz_03.png
xpaset -p ds9 zoom to 0.5
import -window "SAOImage ds9" ds9_02_bbz_04.png
display < ds9_02_bbz_04.png
Applies to images & tables. Combines pixel pixel values.
Block by 2, sums (or averages) pixels in 2x2 grid. Block by 0.5 leaves 1-pixel gap between pixels.
xpaset -p ds9 zoom to 1
xpaset -p ds9 block to 8
import -window "SAOImage ds9" ds9_02_bbz_05.png
display < ds9_02_bbz_05.png
xpaset -p ds9 block to 0.5
import -window "SAOImage ds9" ds9_02_bbz_06.png
display < ds9_02_bbz_06.png
xpaset -p ds9 quit
[1]+ Done ds9 acisf14022N001_evt2.fits -scale log -pan to 3760 4290 physical -bin factor 2