The Roman Coronagraph Community Participation Program: “corgisim” — a simulation suite for the Nancy Grace Roman Space Telescope Coronagraphic Instrument

NASA’s Roman Space Telescope will feature a pathfinder Coronagraph Instrument to demonstrate advanced high-contrast imaging from space. Roman Coronagraph could obtain imaging and spectroscopy of Jupiter analogs in reflected visible light for the first time. We present the work of developing an open-source simulation package “corgisim” as part of the Roman Coronagraph Community Participate Program. Built on established optical propagation libraries such as PROPER and CGISim, corgisim provides a publicly available Python framework for end-to-end simulations of Roman-CGI observations. The package produces high-fidelity, format-compliant data for pre-launch calibration, pipeline testing, and community applications such as target planning and selection and observation planning. We will give an overview of corgisim’s infrastructure, and current implementation across planned imaging, polarimetry, and spectroscopy modes. We will also provide guidance on how users can employ the software.