This package is deprecated. Please use https://github.com/me-manu/gammaALPs/
- Introduction
The python scripts included in this package can be used to compute the oscillation probability of photons into axion-like particles in different settings of the ambient magnetic field.
If you use any of the packages, please give a reference to the following papers:
- Horns et al., 2012, Physical Review D, vol. 86, Issue 7
- Meyer et al., 2013, Physical Review D, vol. 87, Issue 3, id. 035027
- Prerequisites
The scripts require further packages written available at https://github.com/me-manu/ namely the packages eblstud, gmf, and a running version of the modified NE2001 code (Cordes & Lazio, 2001), also available at the above repository. The latter two packages are only required for conversion calculations in the Galactic magnetic field of the Milky Way. Download the packages and the add the paths to your PYTHONPATH variable.
You will also need the following python packages:
- numpy
- scipy
- matplotlib
- astropy
- yaml
- iminuit (if you are using the iminuit_fit script, see below)
- Package contents:
- README.md: the file you are currently reading
- init.py: init the python packages
- conversion.py:photon-ALP conversions in the intergalactic medium
- conversion_ICM.py: photon-ALP conversions in the intracluster medium
- conversion_GMF.py: photon-ALP conversions in Galactic magnetic field
- conversion_Jet.py: photon-ALP conversions in AGN Jet
- iminuit_fit.py: Power law and log parabola fit of spectrum corrected for ALP effect (Jet/ICM + GMF only so far)
- deltas.py: auxilliary functions to calculate the delta (momentum difference) parameters
- example.py: example script
- yaml/PG1553.yaml: example config file to be run with example.py script
- Usage
Test the installation with
python example.py -c yaml/PG1553.yaml
This calculates and plots the photon survival probability for gamma rays originating from the blazar PG1553+113. Both the script and the yaml file are extensively commented to explain the usage.
- License
PhotALPsConv is distributed under the modified BSD License.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
- Neither the name of the PhotALPsConv developers nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PHOTALPSCONV DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.