save_stacked_fits()
Saves the stacked data and error map to a new FITS file.
filename (str) – The output path for the new FITS file.
data (np.ndarray) – The 2D stacked image data.
error_map (np.ndarray) – The 2D standard error map.
original_header (fits.Header) – The header from the original image.
zeropoint (float) – The magnitude zeropoint for this band.