May 13, 2021 - Lensing through deflections

After some hiatus we come back to the project with the hopes of lensing the CIB map "properly", by deflecting the sources and then getting the lensed CIB maps from these.

We will be using the conventions from the paper "Lensed CMB simulation and parameter estimation" https://arxiv.org/pdf/astro-ph/0502469.pdf

There the lensed field [math]\displaystyle{ \tilde X(\hat n) }[/math] is equal to the unlensed field [math]\displaystyle{ X(\hat n') = X(\hat n + \nabla \psi) }[/math].

The relation connecting convergence and gravitational potential is

[math]\displaystyle{ \phi_{\ell m} = \frac{2\kappa_{\ell m}}{\ell(\ell+1)} }[/math]

Jason says that the kappa maps are in

/scratch/r/rbond/jasonlee/cib_lensing2020/kappa_maps/total/

and his code is

/scratch/r/rbond/jasonlee/cib_lensing2020/gal_catalog/mapmaker/project_galaxies_by_redshift_0545.py