GRI: The Gamma-Ray Imager mission

TL;DR

The GRI mission aims to significantly enhance gamma-ray astronomy by providing improved sensitivity and resolution, enabling detailed studies of high-energy astrophysical phenomena and advancing our understanding of the universe's most energetic processes.

Contribution

This paper introduces the Gamma-Ray Imager (GRI) mission, a new gamma-ray observatory utilizing advanced Laue diffraction technology for superior imaging capabilities.

Findings

Enhanced gamma-ray detection sensitivity expected.

Improved angular resolution for gamma-ray sources.

Potential to uncover new astrophysical phenomena.

Abstract

With the INTEGRAL observatory, ESA has provided a unique tool to the astronomical community revealing hundreds of sources, new classes of objects, extraordinary views of antimatter annihilation in our Galaxy, and fingerprints of recent nucleosynthesis processes. While INTEGRAL provides the global overview over the soft gamma-ray sky, there is a growing need to perform deeper, more focused investigations of gamma-ray sources. In soft X-rays a comparable step was taken going from the Einstein and the EXOSAT satellites to the Chandra and XMM/Newton observatories. Technological advances in the past years in the domain of gamma-ray focusing using Laue diffraction have paved the way towards a new gamma-ray mission, providing major improvements regarding sensitivity and angular resolution. Such a future Gamma-Ray Imager will allow studies of particle acceleration processes and explosion physics in unprecedented detail, providing essential clues on the innermost nature of the most violent and most energetic processes in the Universe.