# cosmicPAHmfit

version : 1.0

Authors : Louan de Bentzmann (CNRS, IRAP), Karine Demyk (CNRS, IRAP), Axel Pérignon (CNRS, IRAP), Vincent Marty (CNRS, IRAP), Jean-Michel Glorian (CNRS, IRAP), Christine Joblin (CNRS, IRAP)

Licence : [GPLv3](https://gitlab.in2p3.fr/ovgso/cosmic-pah/cosmic-pah-mfit/-/blob/main/LICENSE)

## Description

CosmicPAHmfit is a python fitting tool. It performs a multi-component fit of the selected spectral feature using pseudo-Voigt functions (linear combination of a Gaussian curve and of a Lorentzian curve possibly modified by an asymmetry factor). It has a graphical interface to select the spectral feature of interest as well as the number of components to be included in the fit. For each component, it provides the evolution of the position, width (FWHM) and integrated intensity as a function of temperature.

User manual is available through [User manuel](https://gitlab.in2p3.fr/ovgso/cosmic-pah/cosmic-pah-mfit/-/wikis/uploads/e15e6afc169937235e6060f1bdc3e518/Manuel_d_utilisation_CosmicPAH-1.pdf)

Full code is available from [gitlab](https://gitlab.in2p3.fr/ovgso/cosmic-pah/cosmic-pah-mfit)

## Citation

[How to cite cosmicPAHmfit](https://gitlab.in2p3.fr/ovgso/cosmic-pah/cosmic-pah-mfit/-/blob/main/CITATION.cff)

## Installation

```

pip install cosmicPAHmfit

python3 cosmicPAHmfit

```

-It is recommanded to use a virtual environment copy/paste The pyenv version can be above 3.12 if preferred. (On windows pyenv is not working, proceed to installation of a compatible python (3.12-3.15). A virtual environment is not mandatory.)

```

pyenv install 3.12.3

pyenv virtualenv 3.12.3 venv

pyenv activate venv

```

If the previous lines doesn't work. Install pyenv:

-On Linux To create a pyenv virtualenv for running an other python in a venv run the following blocks (copy/paste);

```

curl https://pyenv.run | bash

echo 'export PYENV_ROOT=“$HOME/.pyenv”' » ~/.bashrc

echo 'bin && export PATH=“$PYENV_ROOT/bin:$PATH”' » ~/.bashrc

echo 'eval “$(pyenv init -)”' » ~/.bashrc

exec “$SHELL”

sudo apt-get update; sudo apt-get install -y build-essential libssl-dev zlib1g-dev libbz2-dev \

libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev \

xz-utils tk-dev libffi-dev liblzma-dev python3-openssl git

echo 'eval “$(pyenv virtualenv-init -)”' » ~/.bashrc

```

-On MAC if the previous install doesn't work copy/paste the following:

```

brew install pyenv-virtualenv

export PYENV_ROOT=“$HOME/.pyenv”

command -v pyenv >/dev/null || export PATH=“$PYENV_ROOT/bin:$PATH”

eval “$(pyenv init –path)”

eval “$(pyenv init -)”

```

## Usage

Run the following line

```

pyenv activate venv; python3 cosmicPAHmfit

```

to exit the pyenv venv you must use:

```

pyenv deactivate

```

If (venv) appears in the terminal, the pyenv venv is running. To run the application you can use directly:

```

python3 cosmicPAHmfit

```