calc_theta
- acstools.polarization_tools.calc_theta(q, u, detector, pav3)
Calculate the position angle of the electric field vector given Stokes Q and U. For ACS, it is also necessary to supply the position angle of the V3 axis of the telescope (PA_V3 in the primary header) and the name of the ACS detector used.
- Parameters:
- Returns:
theta – Position angle of the electric field vector in degrees.
- Return type: