Upload FITS file as mosaic

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Maria Mastropietro

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Jun 10, 2025, 2:43:27 PMJun 10
to astrometry
Hi Austin,

When I open a FITS file directly in DS9, it only displays one extension by default. However, if I choose “open as mosaic”, DS9 loads all the extensions and displays the full mosaic.
The same happens on astrometry.net. It uploads only a single extension. I would like to upload the entire mosaic, so that astrometry.net returns the WCS file for the full image, which I can then use to update the WCS in my original file.

Is there a way to upload the full mosaic?

Thank you.
Maria

Dustin Lang

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Jun 10, 2025, 3:23:39 PMJun 10
to Maria Mastropietro, astrometry
Hi,

Sorry, the astrometry.net web service only understands single-HDU FITS files.  You will have to manipulate the FITS file to pull out and upload single HDUs.

Best wishes,
dustin


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