- A Catalogue of INTEGRAL Sources
- Presents photographs and observation details of gamma-ray sources identified by the project.
- CNES: Integral
- Provides an overview of the project with photographs and descriptions of collaborators.
- ESA Science and Technology - Integral
- Relays technical data about the facility termed as International Gamma-Ray Astrophysics Laboratory. Includes specifications on its technical functions.
- ESA: INTEGRAL
- Portal for an overview of the mission, recent findings, spacecraft design, and multimedia.
- ESA: Integral operations
- Includes a description of spacecraft operations, ground systems, and the flight control team.
- NSSDC: INTEGRAL
- Compiles information about the launch, orbit, experiments, and data collected.
- SPI / INTEGRAL
- Describes an instrument on the gamma-ray observatory and results obtained.
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