PITAS

Power-spectrum In Tracts Algorithm on the Sphere

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PITAS is an agile routine to compute power spectrum of curved-sky in cylidrical projection (CAR, CEA). The core of the routine is the MASTER algorithm implemented by Thibaut Louis. And it contains an implementation of PURE-EB to compute unbiased CMB polarization spectra. As a part of package, it contains DR3JJ routine to compute Wigner 3j symbols.

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Installation

Core dependencies

1. pixell (https://github.com/simonsobs/pixell)

• In particular, PITAS requires curvedsky module.

2. your favorite FORTRAN compiler to compile PITAS!

Installation steps

  cd <path to pitas>/pitas
  export PITAS_COMP=<Compiler File> ! ex) export PITAS_COMP=nersc_cori
                                    ! Check pitas/compile_opts for more options
  make
  cd ..
  pip install -e . --user           ! install python module 

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Misc/Note

For a trial run, please take a look at test/simple_test.py.