apply_grav_lens¶

simcado.source.apply_grav_lens(image, x_cen=0, y_cen=0, r_einstein=None, eccentricity=1, rotation=0)[source]¶

Apply a singular isothermal ellipsoid (SIE) gravitational lens to an image

Parameters

imagenp.ndarray
x_cen, y_cenfloat: [pixel] centre of the background image relative to the centre of the field of view
r_einsteinfloat: [pixel] Einstein radius of lens. If None, r_einstein = image.shape[0] // 4
eccentricityfloat: [1..0] The ratio of semi-minor to semi-major axis for the lens
rotationfloat: [degrees] Rotation of lens ccw from the x axis

Returns