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.. _hstwcs_ui:
**************************************
HSTWCS UI Examples
**************************************
- Create an HSTWCS object using a pyfits HDUList and an extension number
fobj = pyfits.open('some_file.fits')
w = wcsutil.HSTWCS(fobj, 3)
- Create an HSTWCS object using a qualified file name.
w = wcsutil.HSTWCS('j9irw4b1q_flt.fits[sci,1]')
- Create an HSTWCS object using a file name and an extension number.
w = wcsutil.HSTWCS('j9irw4b1q_flt.fits', ext=2)
- Create an HSTWCS object from WCS with key 'O'.
w = wcsutil.HSTWCS('j9irw4b1q_flt.fits', ext=2, wcskey='O')
- Create a template HSTWCS object for a DEFAULT object.
w = wcsutil.HSTWCS(instrument='DEFAULT')
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