Last modified: 24 September 2020

URL: https://cxc.cfa.harvard.edu/ciao/guides/dax.html

DAX: ds9 analysis extensions

or The CIAO Tools Analysis Menu in DS9


ds9 menu bar with Analysis menu circled

dax*, the Ds9 Analysis eXtensions, is a collection of CIAO tasks that have been integrated with SAOImage DS9 using ds9's analysis menu interface. dax provides users access to many CIAO tools and applications using a simplified graphical user interface.

ds9 menu bar with CIAO Tools (DAX) menu circled

With dax users can perform various image processing operations (eg adaptive and non-linear smoothing), compute net counts and fluxes, perform source detection, and even modeling and fitting of spectra and 2D images using Sherpa.

outline showing dax tasks

[New]The tasks outlined in red are new in the CIAO 4.12.4, September 2020, CIAO contributed scripts release. The existing tasks outlined in blue have significant updates. The tasks with a red-circle indicate tasks which either require or will use the regions drawn.

Additional Resources

The Chandra CIAO YouTube channel contains numerous videos showing how to use dax and ds9. [New] Twenty (20) new videos have been added as part of the CIAO 4.12.4 release to highlight new functionality and updates to the existing dax tasks.

We have also prepared a collection of slides (pdf), Jupyter notebooks, and sample data files (400Mb) describing how to use ds9 and dax.