ExoSim

What is ExoSim?

ExoSim is an open-source, end-to-end time domain simulator of exoplanet transit spectroscopy and photometry. In other words, it outputs a time series of images of an exoplanet’s transit, just like a real observation. It is completely modular, so it can simulate data for any instrument and detector by modifying the XML configuration file and providing parameter files for the instrument and detector.

What does it do?

• ExoSim simulates a complete time domain transit spectroscopic or photometric observation including:
  • The astrophysical scene with planet primary transit or secondary eclipse
  • Modulation of the signal through the telescope, instrument and detector
  • Addition of multiple noise sources and time dependent systematics

What is the current status of ExoSim?

As a part of my undergraduate thesis, I have developed the necessary capabilities for ExoSim to simulate all of Webb’s exoplanet instruments and modes, including:

• Multiple spectral traces
• Curved spectral traces
• Capability to use WebbPSF point spread functions
• JWST readout patterns