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dstndstn / astrometry.net

Astrometry.net -- automatic recognition of astronomical images
http://astrometry.net
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`--crpix-center` sets `CRPIX` to zero instead of center when verifying #174

Closed mwcraig closed 4 years ago

mwcraig commented 4 years ago

When I run astrometry.net (local installation) on an image that already contains a WCS and specify --crpix-center on the command line, the resulting WCS actually has CRPIX at [0, 0].

I see the same behavior with release 0.72 and when I build from source at commit 59afe904e2c095d0b755648b7df975c274272231.

To reproduce:

  1. Grab this fits file (32MB): https://www.dropbox.com/s/6dfct0mvo5o4mtn/TIC_83210867.01-S001-R089-C001-rp.fts?dl=0
  2. Run solve-field on it; the key option is --crpix-center: solve-field --obj 100 --scale-low 0.5 --scale-high 0.6 --scale-units arcsecperpix --no-remove-lines --uniformize 0 --use-sextractor --no-plot --corr none --rdls none --match none --wcs none --crpix-center TIC_83210867.01-S001-R089-C001-rp.fts
  3. The fits file output by solve-field has crpix at [0, 0]:
CRPIX1  =                    0 / X reference pixel
CRPIX2  =                    0 / Y reference pixel

The original FITS file had CRPIX at the center of the image.

Note: This may be related to #79

dstndstn commented 4 years ago

Possibly fixed by c7b776c1d0506e3b78f080ba55ee6931136a3655

mwcraig commented 4 years ago

This bug is gone in master but was still present in 0.80 -- thanks for the fix!

mwcraig commented 4 years ago

Closing, because this has been fixed in the recent release -- thanks!