extract_ref

acstools.utils_calib.extract_ref(scihdu, refhdu)

Extract section of the reference image that corresponds to the given science image.

This only returns a view, not a copy of the reference image’s array.

Parameters:

• scihdu (obj) – Extension HDU’s of the science and reference image, respectively.

• refhdu (obj) – Extension HDU’s of the science and reference image, respectively.

Returns:

refdata – Section of the relevant reference image.

Return type:

array-like

Raises:

• NotImplementedError – Either science or reference data are binned.

• ValueError – Extracted section size mismatch.