DAX : ds9 Analysis eXtensions

dax is a collection of ds9 analysis scripts which allows users to perform some simple CIAO tasks directly from within ds9 with minimal inputs. Many of the dax tasks are specific to Chandra data analysis; however, some tasks are generic.

Data

download_chandra_obsid 635 evt1,asol,pbk,bias,flt,fov,stat,mtl,msk,dtf,bpix
chandra_repro 635 out=./
In [1]:
cd Dax
In [2]:
# In notebook the ots/bin/ds9 is in PATH first.  Need to run wrapper explicitly

$ASCDS_INSTALL/bin/ds9 acisf00635_repro_evt2.fits -bin factor 4 -scale log -scale limits 0 100 &

[1] 27563
In [3]:
import -window "SAOImage ds9" -resize 50% dax_01.png 
display < dax_01.png










    




























The Analysis menu (right hand side) contains a lot of functionality.


At the bottom will be the CIAO sub-menu.  This is dax.













In [4]:



    


# Tear off Analysis menu
sleep 5

import -window "Analysis" -resize 50% dax_02.png 
display < dax_02.png



    















    















    




























The dax tasks are divided into several groups


    

  • Statistics : Number of counts, centroid
    • 

  • Histograms : Spectra, Lightcurves
    • 

  • Coords : Convert to Chandra specific coordinate systems
    • 

  • Detect : Source detection tools
    • 

  • Regions : Different ways to create regions
    • 

  • Sherpa : Spectral fitting and 2D image fitting
    • 

  • Image Processing : Generic image processing tools (smoothing, threshold)
    • 














In [5]:



    


# Open, Tear Off CIAO menu
sleep 2

import -window "CIAO" -resize 50% dax_02.png 
display < dax_02.png



    















    















    




























Statistics














Net Counts












In [6]:



    


xpaset -p ds9 regions command "circle(3814,3466,45)"



    













In [7]:



    


xpaset -p ds9 analysis task '{Net Counts}'
sleep 5
# Resize window

import -window "Net Counts" -resize 50% dax_04.png 
display < dax_04.png



    















    















    


























In [8]:



    


xpaset -p ds9 regions command "{circle(3878,3742,80) # background}"



    













In [9]:



    


xpaset -p ds9 analysis task '{Net Counts}'
sleep 5
# Resize window

import -window "Net Counts" -resize 50% dax_05.png 
display < dax_05.png



    















    















    




























Source Fluxes












In [10]:



    


xpaset -p ds9 regions select all

xpaset -p ds9 analysis task '{Photometry (srcflux)}'



    













In [11]:



    


# Wait for srcflux ~1min

# Resize window
sleep 3

import -window 'Photometry (srcflux)' -resize 50% dax_05a.png
display < dax_05a.png



    















    















    




























Plots












In [12]:



    


xpaset -p ds9 analysis task '{G-L Vary}'



    













In [13]:



    


sleep 2

# Click on chips window
import -resize 50% dax_06.png
display < dax_06.png



    















    















    


























In [14]:



    


# Right Click
# Show GUI
# Click on Histogram

sleep 5
import -window 'ChIPS GUI Panel' -resize 50% dax_07.png
display < dax_07.png



    















    















    




























Sherpa












In [15]:



    


# Tear Open and Tear off Sherpa menu 
sleep 5

import -window 'Sherpa' -resize 50% dax_08.png
display < dax_08.png



    















    















    




























Spectral Fit












In [16]:



    


xpaset -p ds9 regions select all



    













In [17]:



    


xpaset -p ds9 analysis task '{Spectral Fit}'



    













In [18]:



    


# Wait for fit to complete ~ 20 sec

import -window 'Spectral Fit' -resize 50% dax_09.png
display < dax_09.png



    















    















    


























In [19]:



    


# Click on Chips Window
sleep 3

import -resize 50% dax_10.png
display < dax_10.png



    















    















    




























2D Image Fit












In [20]:



    


xpaset -p ds9 analysis task '{2D Image Fit}'



    













In [22]:



    


xpaset -p ds9 tile 

import -window "SAOImage ds9" -resize 50% dax_11.png
display < dax_11.png



    















    















    


























In [23]:



    


import -window "2D Image Fit" -resize 50% dax_12.png
display < dax_12.png



    















    















    


























In [24]:



    


xpaset -p ds9 quit



    















    
























In [ ]: