MAGnetar Polarisation, Intensity and Spectroscopy code.
This code will generate synthetic X-ray lightcurves, spectra, phased-resolved spectrocopy plots and polarisation plots for given configuration of magnetosphere and surface thermal maps for neutron stars. Photons are scattered in magnetosphere due to the inverse Compton scattering and their trajectories are solved using the Monte Carlo techniques.
The code development is in progress and current version of the code does not have the full functionality.
To compile the code run:
make
The magnetosphere has to be solved first. In order to solve the equation for the twisted magnetosphere run:
python3 solve_twisted_magnetosphere.py 20 0.97
where the first parameter is the degree of trigonometric polynomial used to expand the solution and the second parameter is p.
The code should produce a photon list with phases. Current (simplified) version of the code can be ran as:
./magpies.out
This simple run should create file photon_list.txt which contains the following: (1) theta, (2) phi and (3) final energy of photon only for photons which leave the system and reaches the observer
The spectral information is stored in the file photon_list.txt. This information is used by python script plot_spectra.py:
python3 plot_spectra.py
Should produce the spectra as the following.
Fernandez & Thompson (2007), ApJ, 660, 615
Nobili, Turolla & Zane (2008), MNRAS, 386, 1527
Pavan, Turolla, Zane & Nobili (2009), MNRAS, 395, 753
Thompson, Lyutikov & Kulkarni (2002), ApJ, 574, 332