WCS via AstroImageJ

[tgkd...@gmail.com]

I think I have two problems. Most important: after a plate solution, I click on "new-image.fits" to download it. I get the following error message:

image2pnm.py failed: out Dirs: ['/home/nova/nova/util', '/home/nova/nova/util'] , err ERROR: Image type not recognized: Unknown image type "['ASCII text', 'data']"

I think this is a file with the necessary wcs data that AIJ will use to determine RA/DEC of objects in the field (?).

Less important: whenever I try to submit an image to the plate solver using AIJ, it returns an error to the effect that the submission failed, (not the plate solution). When I look my account at astrometry.net, the image is there with a successful plate solution. Thanks, -tim

[Dustin Lang]

Instead of new-image.fits (which is supposed to be the image file with the new WCS header), try wcs.fits .

As for the other issue, you should contact the AIJ author (who is not here).

cheers,

--dustin

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[tgkd...@gmail.com]

Neither AIJ nor AIP4WIN recognize the wcs.fit file. Neither will open it. Can you recommend a program that will open it and take advantage of the plate solution? i.e. click on an object and the program returns RA/DEC?  I do appreciate your time. -tim

[Dustin Lang]

The wcs.fits file is only a *header* -- it's just a specially-formatted text description of the WCS.

If you look on the nova.astrometry.net site's results page for an image, the "new-image.fits" link is your image plus that new header.  Programs like "SAOImage ds9" will open it and give you RA,Dec at your cursor position.

cheers,

--dustin

[Ravi Gupta]

You can open just the WCS FITS header using astropy if you like:

```

from astropy.io import fits
wcs = fits.getheader('wcs.fits')

```

[tgkd...@gmail.com]

This was my original understanding. Not sure why it didn't work before. I reinstalled AIJ and it works now. Thanks & venerations. -tim

[tgkd...@gmail.com]

I think I figured out the original difficulty, which may be an AstroImageJ  problem. When I submit an image via the astrometry.net web interface, I get a solution page with a link to the new-image.fits file. I click on it, and it downloads into my windows "download" folder.  

When I submit it from AstroImageJ, it gives me solution page I've come to know and love, but when I click on the new-image.fits file I get this error message:

image2pnm.py failed: out Dirs: ['/home/nova/nova/util', '/home/nova/nova/util'] , err ERROR: Image type not recognized: Unknown image type "['ASCII text', 'data']"

-tim

[Dustin Lang]

Oh, I bet AIJ doesn't upload your image, it uploads a text x,y list of star positions, which we can't make into a new image (because it's not an image).

--dustin

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