====== Gamma-ray telescopes ======

^ Telescope Name ^ Location ^ Frequency Range ^ Number of Antennas ^ Key Scientific Objectives ^ Notable Features ^
| **Fermi Gamma-ray Space Telescope (formerly GLAST)** | Space (NASA mission) | 8 keV–300 GeV | Space telescope | Gamma-ray bursts, active galactic nuclei, cosmic rays | Large Area Telescope (LAT) and Gamma-ray Burst Monitor (GBM) for high sensitivity across a wide energy range |
| **HESS (High Energy Stereoscopic System)** | Namibia | 100 GeV–100 TeV | Ground-based, imaging atmospheric Cherenkov telescope | Supernova remnants, pulsars, black holes | Array of telescopes providing very high energy gamma-ray imaging with stereoscopic capabilities |
| **VERITAS (Very Energetic Radiation Imaging Telescope Array System)** | Arizona, USA | 50 GeV–50 TeV | Ground-based, imaging atmospheric Cherenkov telescope | Active galactic nuclei, pulsars, gamma-ray bursts | High-resolution gamma-ray imaging; focuses on transient and high-energy sources |
| **MAGIC (Major Atmospheric Gamma Imaging Cherenkov Telescopes)** | La Palma, Canary Islands, Spain | 30 GeV–100 TeV | Ground-based, imaging atmospheric Cherenkov telescope | Gamma-ray bursts, black holes, dark matter | Sensitive to very high-energy gamma rays; dual-telescope system for improved sensitivity |
| **INTEGRAL (INTErnational Gamma-Ray Astrophysics Laboratory)** | Space (ESA mission) | 15 keV–10 MeV | Space telescope | Gamma-ray bursts, black holes, neutron stars | Combines gamma-ray, X-ray, and optical detectors; high spectral and angular resolution |
| **SWIFT BAT (Burst Alert Telescope)** | Space (NASA mission) | 15–150 keV | Space telescope | Gamma-ray bursts, transient events, supernovae | Rapid response and localization for gamma-ray bursts, multi-wavelength follow-up capabilities |
| **AGILE (Astro-rivelatore Gamma a Immagini Leggero)** | Space (ASI mission, Italy) | 30 MeV–50 GeV | Space telescope | Gamma-ray bursts, pulsars, black holes | High-resolution gamma-ray imaging, rapid alert system for transient events |
| **CTA (Cherenkov Telescope Array)** | Under construction (Chile and Spain) | 20 GeV–300 TeV | Ground-based, imaging atmospheric Cherenkov telescope | Dark matter, cosmic rays, supernova remnants | Next-generation gamma-ray observatory, array of 100+ telescopes for ultra-high sensitivity |
| **COMPTEL (Compton Telescope on CGRO)** | Space (NASA mission, decommissioned in 2000) | 0.75–30 MeV | Space telescope | Galactic sources, gamma-ray bursts, cosmic rays | First telescope to map the gamma-ray sky at MeV energies; part of Compton Gamma Ray Observatory (CGRO) |
| **LAT (Large Area Telescope on Fermi)** | Space (part of Fermi mission) | 20 MeV–300 GeV | Space telescope | Active galactic nuclei, gamma-ray bursts, cosmic rays | High sensitivity and wide field of view; maps the gamma-ray sky with excellent angular resolution |