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The CASTOR image simulator, a Python GalSim package-based script capable of generating mock CASTOR images from an input catalogue

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CASTOR Image Simulator

FORECASTOR Team - 2022-2024

This repository contains code developed to make mock astrophysical images for CASTOR using the GalSim python package, as presented in the manuscript "FORECASTOR -- II. Simulating Galaxy Surveys with CASTOR". Also included are the scripts used to make comparison images for LSST and GALEX.

This repository also includes preliminary estimates for the CASTOR bandpasses and PSFs, for use in these simulations.

These codes and files are also hosted on CANFAR, for ease of use. The code is designed to be used with simulated light-cones from the Santa Cruz Semi-Analytic Model, which are proprietry and not publicly available. The mock lightcones are available on CANFAR for members of the CASTOR team for the sole purpose of creating simulated images for CASTOR science planning. These codes can be adapted for use with other lightcones/input galaxy catalogues, for those external to the CASTOR team.

Please contact Madeline Marshall at madeline_marshall@outlook.com or Tyrone Woods at Tyrone.Woods@umanitoba.ca for questions about access.

To use on CANFAR:

  1. Ensure you have a Canadian Astronomy Data Centre account (or request one if you do not have one yet), with membership to the CASTOR project.
  2. Go to CANFAR and sign in to the Science Portal. If you cannot access this, then you must send an email to support@canfar.net requesting access to the Science Portal.
  3. Inside the Science Portal, click the "+" icon to launch a new session. Under "type", select "notebook". If multiple castor_etc versions are available, you can select the specific version you would like to use under the "container image" field; these codes were designed to work on versions 1.2.8 and above.
  4. Click the blue "Launch" button to start your new castor_etc notebook session.
  5. These codes are set up to work "out of the box" within this JupyterLab environment. The codes can be found at /arc/projects/CASTOR/MockPhotometry, alongside the mock lightcones which are found in /arc/projects/CASTOR/Simulations.

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The CASTOR image simulator, a Python GalSim package-based script capable of generating mock CASTOR images from an input catalogue

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