Fedora and Imtool

[Guest]

Hi, this is Glen Williams at Central Michigan University. We just
purchased a new PC workstation for running IRAF. The operating system
is the newest version of Fedora Linux. We are not able to get Imtool to
work, apparently because Fedora is 24-bit and Imtool is 8-bit. I am
told that you are working on a new version of Imtool that will be
24-bit. Do you have any suggestions on what we can do in the mean time
to get IRAF running? Is DS9 an option? Our computer person tells me
that DS9 could display the images, but he thinks that it runs
independently of IRAF. Thanks.

Glen Williams
Professor of Astronomy, CMU




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[Guest]

Hi Glen,
DS9 will work as a display server for IRAF in the same way that
XImtool will. The main difference is that DS9 doesn't make use of all f
the information IRAF sends during the display and so the pixel and WCS
readout you see are approximations. If you load the image into DS9
directly using the File menu you'll see the proper values and coords.
For 24-bit display this is your only option, I'll append some old notes
on using XImtool workarounds. Hope this helps.

Cheers,
Mike Fitzpatrick

-------------------

> The BadMatch means that your X server is using something other
> than an 8-bit PseudoColor default visual. Unfortunately the only workaround
> for this is to start an 8-bit server using a command such as
>
> % startx -- -bpp 8
> % startx -- -depth 8 (for XFree86 V4 systems like RedHat 7)
>
> or for Sun systems:
>
> % Xsun :0 -dev /dev/fb defclass PseudoColor defdepth 8
>
> (note the command will vary depending on the platform).
>
> (For PC systems using XFree86):
>
> If you don't have an 8-bit visual defined the Xconfigurator command will let
> you set one up. You can switch back to 24-bits when you don't need ximtool.
> If you don't want to log out of X to switch there is another more complicated
> way, see
>
> http://tdc-www.harvard.edu/software/saoimage/saoimage.16bit.html
>
> This starts another X server on an alternate virtual console, it takes a
> bit more memory but works like another virtual desktop.
> Another workaround is to use VNC, see details at
>
> http://sparky.rice.edu/~hartigan/vnc.html
>
> (For most other systems):
>
> Lastly, the successor to SAOtng (which is based on XImtool) is
> called DS9 and work was recently completed to add the IIS display
> protocol to it so it can be used as an image display server for IRAF,and
> DS9 *will* work in 24-bit visuals. For more information about this or to
> get the program see sao-ftp.harvard.edu:/pub/rd/ds9 or contact
> saord@cfa.harvard.edu. They also have a web page with more information at
> http://hea-www.harvard.edu/RD/ds9/.




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