October 1st, 2018

Code Details and Software Installation

Connor Bevington's GitHub repository is here: [1] This repository contains .ini files for input to the Cosmology Object Oriented Package (COOP): [2] I have installed COOP in my CITA computing account. COOP requires several other packages to run; many of the most recent versions of these packages were incompatible with COOP. The versions that have worked for me are:

• Healpix V3.31
• gcc/5.4.0
• openmpi/2.0.0-gcc-5.4.0
• gsl/2.2.1-gcc-5.4.0
• cfitsio/3.390

All of the above can be loaded as modules on the CITA system except for Healpix, which can be downloaded from here: [3].

The basic structure to run the stacking codes is to first run a program to find peaks, and then run a second program to stack on those peaks. These programs are run in COOP/mapio. For example, this might look like:

./GetPeaks planck_tt_max_random.ini

./Stack planck_tt_max_random_stack.ini

Naming conventions for the files are found on Connor's GitHub READMEs. "GetPeaks" produces a list of points to stack on, depending what the .ini file defines as a peak. "Stack" does the actual stacking and produces a .txt file that can be converted to a .pdf image by the following (ran in COOP/mapio):

python ../utils/pypl.py myfigure.txt myfigure.pdf

This did not work with me when the COOP required modules were loaded, but I had success after unloading the current gcc and Python and instead loading:

• gcc/7.3.0
• Python 2.7.3

The images displayed below are from this pre-made COOP plotting function. "Stack" also produces a FITS file that can be manually plotted or loaded in saods9, instead of using the previous command.

Maps

== <tSZ | tSZ>

Peaks in Planck tSZ map stacked onto each other

Random orientation:

File:Planck tt max random stack.pdf

QU orientation:

File:Planck tt max QU stack.pdf