On Thu, 8 Oct 2009, Edward Chapin wrote:
> I seem to have encountered a GAIA bug.
>
> Please download this tarball (BLAST observations of Cas-A supernova remnant):
>
> http://www.physics.ubc.ca/~echapin/cadc/blast05/BLASTcasa2005-06-12.tar.gz
>
> Inside is a file called
>
> BLASTcasa2005-06-12_250_decon_2008-12-22.fits
>
> HDU 1 is a 2d image
>
> HDU 2 is a 3d cube (first 2 dims are angular, last dim enumerates iteration
> number from a lucy-richardson deconvolution).
>
> In the FITS HDU dialogue I can click on HDU2 and in the main GAIA window it
> shows me the first plane of the cube. However, if I then select File -> Open
> Cube it seems to have problems. The slider (using Axis 3) runs from 1 to 100
> (there are only 10 planes), and moving it has no effect on the main image
> window.
>
> I tried loading in HDU 2 with IDL and it looked OK, so I think it's just a
> GAIA issue.
Hi Ed,
when you open HDU 2 using the default HDU browser, what you get is just an
image, so that's why the cube toolbox isn't moving between the slices. For
technical reasons it isn't possible to make this particular toolbox open
a cube (related to the way that I generate the slice), so I added a new
set of features for "browsing" FITS extension when you need to load a cube
and the primary HDU contains an image.
So to open a cube when there's an image in the primary extension you need
to "browse" to it. So select "Choose file..." in the cube toobox, then
select the FITS file in the dialog that appears, and then choose "Browse",
finally select the extension to load the cube. This also works using the
"File->Open..." dialog in the main window (the other ability you get from
browsing is opening catalogues in extensions).
Alternatively just do:
gaia BLASTcasa2005-06-12_250_decon_2008-12-22.fits -hdu 2
to open it from the command-line.
Sorry about this wart.
Peter.
--
Peter W. Draper, http://astro.dur.ac.uk/~pdraper
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