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Last modified: 13 March 2017

Can I use a newer version of ds9 than the one packaged with CIAO?


In short, yes. There is a simple way to do so and a few important caveats associated with upgrading the imager, all of which are described in this FAQ.

When a CIAO release is being prepared, the most recent version of ds9 available is used in testing and then packaged with the software. Since updates to ds9 are released on a shorter timescale than CIAO, users may wish to upgrade independently of CIAO to take advantage of new features and bug fixes.

The $HOME/.ciaorc file is used to specify the path to a different installation of ds9. The default entry looks like this:

# Replace /usr/local/bin with path to ds9 to force use of local ds9
#DS9 /usr/local/bin

Uncomment the second line and change the path to the location of the newer imager on your system:

# Replace /usr/local/bin with path to ds9 to force use of local ds9
DS9 /your/ds9/path

Then restart CIAO so that the .ciaorc file is read. The new imager is now available to CIAO. To confirm that the new path is being used:

unix% echo $ASCDS_IMAGER_PATH
/your/ds9/path

Note: the command "which ds9" will continue to point to /soft/ciao/bin/ds9, which is a wrapper script for the application.

Caveats

For more general information on how to use ds9, refer to the Using SAOImage ds9 thread.



Last modified: 13 March 2017
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