gen_new_wcs#

niriss_tools.isophotal.gen_new_wcs(ref_path, ref_hdu_index=0, resolution=0.04, padding=100)[source]#

Generate a new WCS for a given reference image.

The new WCS is North-aligned, and can optionally take on a specified pixel scale. Padding is applied relative to the minimal extent of the reference image (ignoring NaNs).

Parameters:

ref_pathPathLike: The path of the reference image, to which all other images will be cropped.
ref_hdu_indexint, optional: The index of the HDU containing the reference image, by default 0.
resolutionfloat | Quantity, optional: The pixel scale used in the new WCS. If a float is supplied, the units are assumed to be arcseconds. By default 0.04.
paddingint | tuple[int, int], optional: The padding to apply around the reference image in pixels, by default 100. If a tuple is supplied, the values are applied in the order (axis2, axis1).

Returns:

new_wcsWCS: The new WCS, as calculated from the input parameters.
new_shape(int, int): The shape of the array required to cover the reproject reference image, and the associated padding.