External maps

Set the potential profile to the type external maps

This potential takes parameters as parameter int filename

parameter can take the following values: kappamap: a convergence map gamma1map: a shear map (x-axis projection) gamma2map: a shear map (y-axis projection) dplxmap: a displacement map along the x direction. dplymap: a displacement map along the y direction. potenmap: a potential map

All maps should be provided as FITS format (filename), have the same WCS, and be normalised at DLS/DS=1 (apart from potenmap).

int: only read maps if non-zero. Value should be 3 for usual WCS formats (RA—TAN / DEC–TAN).

In addition the redshift of the plane is provided by the z_lens parameter.