add_astrometry

msumastro.header_processing.astrometry.add_astrometry(filename, overwrite=False, ra_dec=None, note_failure=False, save_wcs=False, verify=None, try_builtin_source_finder=False, custom_sextractor=False, odds_ratio=None, astrometry_config=None, camera='', avoid_pyfits=False)

Add WCS headers to FITS file using astrometry.net

Parameters

overwritebool, optional

Set True to overwrite the original file. If False, the file astrometry.net generates is kept.

ra_declist or tuple of float or str

(RA, Dec) of field center as either decimal or sexagesimal; also limits search radius to 1 degree.

note_failurebool, optional

If True, create a file with extension “failed” if astrometry.net fails. The “failed” file contains the error messages genreated by astrometry.net.

try_builtin_source_finderbool

If true, try using astrometry.net’s built-in source extractor if sextractor fails.

save_wcs :

verify :

See call_astrometry()

camerastr, one of [‘celestron’, ‘u9’, ‘cp16’], optional

Name of camera; determines the pixel scale used in the solved. Default is to use ‘u9’.

avoid_pyfitsbool

Add arguments to solve-field to avoid calls to pyfits.BinTableHDU. See https://groups.google.com/forum/#!topic/astrometry/AT21x6zVAJo

Returns

bool

True on success.

Notes

Tries a couple strategies before giving up: first sextractor, then, if that fails, astrometry.net’s built-in source extractor.

It also cleans up after astrometry.net, keeping only the new FITS file it generates, the .solved file, and, if desired, a “.failed” file for fields which it fails to solve.

For more flexible invocation of astrometry.net, see call_astrometry()