humnaawan/cmblxlss

Analysis of cross-correlations between CMB lensing and LSS.

Goal: end-to-end simulation of LSST-LSS x SO-CMB Lensing cross-correlations.

We calculate the cross-correlations between CMB lensing reconstructions and a (correlated) galaxy density field. The lensing reconstructions currently account for (stacked) foregrounds and the LSST survey mask based on a depth-limited LSST footprint, while the correlated galaxy density field accounts for the LSST survey mask and modulation seen due to the systematics induced by the depth non-uniformities (with, without MW dust).

Analysis Details

[Need to be written out, once finalized]

Repo structure

• The code folder contains the working code. The notebooks folder contains some helper notebooks.
• The legacy folder contains code/docs from initial analyses/exploration. Specifically, in legacy-recent:
  • The main code is in two scripts: code/save_needed_alms.py calculates the various alms and saves them, while code/get_spectra.py reads in the saved alms to calculate and plot the spectra. These scripts which use the rest of the files in that folder.
  • scripts/run_analysis.sh runs the python scripts with specific inputs.
  • The code needed orphics, pixell, and falafel; all these have changed though.

Dependencies

The code needs basic packages: healpy, numpy, matplotlib.