cora - Cosmology in the Radio Band

A package for simulating skies for 21cm Intensity Mapping, with a lot of bonus utility code for dealing with Healpix maps, spherical co-ordinates etc.

Installation

This package has many dependencies. The following are essential:

• Python <http://www.python.org/> 3.10 or later
• Numpy <http://numpy.org/> (version 1.24 or later)
• Scipy <http://scipy.org/>
• Cython <http://cython.org/>

It is strongly recommended that you use optimized versions of Numpy and Scipy compiled against a multithreaded BLAS library such as the Intel MKL <http://www.intel.com/software/products/mkl/> or for AMD chips ACML <http://developer.amd.com/libraries/acml>.

For full functionality there are other packages which are required:

• Healpy <https://github.com/healpy/healpy> (version 1.17 or later)
• h5py <http://www.h5py.org/>

If you are building healpy yourself, you will also the following libraries:

• pkg-config
• HEALPix
• cfitsio

See https://healpy.readthedocs.io/en/latest/install.html#building-against-external-healpix-and-cfitsio for more information about building healpy.

As there are several Cython modules which need to be built the setup.py must be run in some form. The recommended way to do this is ::

$ pip install [-e] .

If you just need to recompile any Cython modules ::

$ python setup.py build_ext --inplace

Referencing

If you use this package in published scientific work, please cite the corresponding Zenodo listing (https://zenodo.org/records/13181020), along with the two papers that describe various aspects of the simulation implementation: https://arxiv.org/abs/1302.0327 and https://arxiv.org/abs/1401.2095.