ExoSim (Exoplanet Observation Simulator) is a generic time-domain simulator of exoplanet transit spectroscopy.
We recommend setting up a virtual environment for ExoSim to avoid package conflicts. Using conda the following command line instruction will do all this for you producing a stable environment for this version:
conda create -n exosim python=3.8.5 matplotlib=3.3.1-0 setuptools=49.6.0 numpy=1.19.1
Then activate this environment. Depending on the system the activation command may be any one of the following:
source activate exosim
or
conda activate exosim
or
activate exosim
There is currently no setup.py file for this version so please install the following additional packages using pip inside your virtual environment.
pip install pytransit==2.1.1
pip install scipy==1.5.2
pip install astropy==4.0.1
pip install quantities==0.12.4
pip install emcee==3.0.2
pip install seaborn==0.10.1
pip install uncertainties==3.1.4
pip install tqdm==4.48.2
pip install lxml==4.5.2
pip install photutils==1.0.1
pip install exodata
Next, download the ExoSim repository from github and unzip on your computer.
Next, download the following databases.
Phoenix BT-Settl database (Allard F., Homeier D., Freytag B., 2012, Philos. Trans. Royal Soc. A, 370, 2765). Then move the folder into exosim/data/ .
In the input configuration file exosim_defaults.xml change the StarSEDPath val entry to val= "your path to the folder".
Open Exoplanet Catalogue. Then move the folder into exosim/data/ .
In the input configuration file exosim_defaults.xml change the OpenExoplanetCatalogue val entry to val= "your path to the systems folder".
If running from the terminal you will need to add exosim to the PYTHONPATH
PYTHONPATH=$PYTHONPATH:/....your path to.../ExoSimPublic-master
export PYTHONPATH
ExoSim should now be ready to run. Run from the terminal with:
python runexosim.py
FITS files with the image time series are deposited in the folder ExoSimOutput which will appear in your home directory.
If you use ExoSim in your research, please cite: Sarkar, S., Pascale, E., Papageorgiou, A. et al. ExoSim: the Exoplanet Observation Simulator. Exp Astron (2021). https://doi.org/10.1007/s10686-020-09690-9