astrocut.fits_cut(input_files, coordinates, cutout_size, correct_wcs=False, drop_after=None, single_outfile=True, cutout_prefix='cutout', output_dir='.', verbose=False)[source]

Takes one or more fits files with the same WCS/pointing, makes the same cutout in each file, and returns the result either in a single fitsfile with one cutout per extension or in individual fits files.

Note: No checking is done on either the WCS pointing or pixel scale. If images don’t line up the cutouts will also not line up.


List of fits image files to cutout from. The image is assumed to be in the first extension.

coordinatesstr or SkyCoord object

The position around which to cutout. It may be specified as a string (“ra dec” in degrees) or as the appropriate SkyCoord object.

cutout_sizeint, array-like, Quantity

The size of the cutout array. If cutout_size is a scalar number or a scalar Quantity, then a square cutout of cutout_size will be created. If cutout_size has two elements, they should be in (ny, nx) order. Scalar numbers in cutout_size are assumed to be in units of pixels. Quantity objects must be in pixel or angular units.


Default False. If true a new WCS will be created for the cutout that is tangent projected and does not include distortions.


Default True. If true return all cutouts in a single fits file with one cutout per extension, if False return cutouts in individual fits files. If returing a single file the filename will have the form: <cutout_prefix>_<ra>_<dec>_<size x>_<size y>.fits. If returning multiple files each will be named: <original filemame base>_<ra>_<dec>_<size x>_<size y>.fits.


Default value “cutout”. Only used if single_outfile is True. A prefix to prepend to the cutout filename.


Defaul value ‘.’. The directory to save the cutout file(s) to.


Default False. If true intermediate information is printed.

responsestr or list

If single_outfile is True returns the single output filepath. Otherwise returns a list of all the output filepaths.