Container Images

OCI-compatible container images are available for simtools users and support both application and development use cases. Runtimes such as Docker, Podman, or Apptainer can be used. Apptainer users should pull the OCI image with a docker:// reference.

Pre-built Images

Below is an overview of the most-relevant pre-built container images available from the simtools package registry.

All images use almalinux:9.8 or almalinux:9.8-minimal. The simtools production and development images use Python 3.14.

Simtools for Production

• registry page: simtools-prod

• Docker file: Dockerfile-simtools-prod

image tag	simtools	CORSIKA	sim_telarray	remarks
v0.27.0-v78010-v2025-11-30-rc-generic, avx2, avx512f, sse4	v0.27.0	v78010	v2025-11-30-rc	no QGSJet2/3 tables included

The generic image is compatible with ARM and x86_64 CPUs, all other images are for x86_64 CPUs only.

No separate Apptainer images are published. To use an image with Apptainer, pull the matching OCI image from the GitHub Container Registry with apptainer pull docker://... and run the resulting local SIF file.

Simtools for Developers

• registry page: simtools-dev

• Docker file: Dockerfile-simtools-dev

image tag	simtools	CORSIKA	sim_telarray	remarks
v0.27.0	v0.27.0	v7.8010	v2025-11-30-rc	includes QGSJet3 tables

Images are compatible with ARM and x86_64 CPUs.

CORSIKA7

• registry page: corsika7

• Docker file: Dockerfile-corsika7

image tag	CORSIKA	high-/low-energy interaction models	compile configuration	optimization patches	IACT/ATMO
v78010-generic, avx2, avx512f, sse4	v7.8010	QGSJet-II/URQMD; QGSJet-III/URQMD; EPOS/URQMD	CTAO corsika7-config	v1.1.0	1.69

The generic image is compatible with ARM and x86_64 CPUs, all other images are for x86_64 CPUs only.

The CORSIKA images include QGSJet-II/URQMD executables for flat and curved atmospheres. Select QGSJet-II with corsika_he_interaction=qgs2 (for example, with --corsika_he_interaction qgs2 when using the simtools command-line applications).

Important

Container images do not include the interaction tables required by CORSIKA. Follow the CORSIKA documentation for the current table set and installation instructions.

sim_telarray Images

• registry page: sim_telarray

• Docker file: Dockerfile-sim_telarray

Image tag	sim_telarray	hessio version	stdtools version
v2025-11-30-rc	v2025-11-30-rc)	v2025-12-01-rc	v2025-06-16-rc

Note: Version names should be replaced with actual version numbers when releases are available.