compute_siaf_pa_offset¶
- grizli.jwst_utils.compute_siaf_pa_offset(c1, c2, c2_pa=202.9918, swap_coordinates=True, verbose=False)[source]¶
Eq. 10 from Bonaventura et al. for the small PA offset based on the median catalog position
Seems to have a sign error relative to what APT calculates internally, used if
swap_coordinates=True- Parameters
- c1array-like
Catalog position (ra, dec).
- c2array-like
APT position (ra, dec).
- c2_pafloat
APT position angle (deg).
- swap_coordinatesbool
Swap the coordinates to agree with APT.
- verbosebool
Print messaging to the terminal.
- Returns
- new_pafloat
New position angle.
- dphifloat
Delta position angle.