Gamma-ray detector and mission design simulations

Abstract

Detectors for gamma-ray astronomy are complex: they often comprise multiple sub-systems and utilize new and/or custom-developed detector components and readout electronics. Gamma rays are typically not detected directly: ground-based detectors measure extensive air showers of charged particles initiated by cosmic gamma-rays, and even so-called "direct detection" experiments on balloons or satellites usually reconstruct the incoming gamma-ray photons' properties from the secondary particles produced in the detector. At the same time, there are few "standard candles" and no feasible terrestrial sources of high-energy and very-high-energy gamma rays that could be used to calibrate the detectors. Simulations of particles interacting in the atmosphere and/or with the instrument are thus ubiquitous in gamma-ray astronomy. These simulations are used in event reconstruction and data analysis, to characterize detector performance, and to optimize detector design. In this chapter, we give an overview of how and why simulations are used in gamma-ray astronomy, as well as their limitations. We discuss extensive air shower simulations, simulations of gamma rays and secondary particles interacting in the detector, and simulations of the readout electronics. We provide examples for software packages that are used for various aspects of simulations in gamma-ray astronomy. Lastly, we describe the performance metrics and instrument response functions that are generated from these simulations, which are critical to instrument design and data analysis.

arXiv commentTo be included in the "Handbook of X-ray and Gamma-ray Astrophysics", Ed. C. Bambi, A. Santangelo

References in corpus (23)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Fermi Large Area Telescope Second Source Catalog
• Observations of the Crab Nebula with H.E.S.S
• The major upgrade of the MAGIC telescopes, Part II: A performance study using observations of the Crab Nebula
• The Fermi Large Area Telescope On Orbit: Event Classification, Instrument Response Functions, and Calibration
• QGSJET-II: towards reliable description of very high energy hadronic interactions
• Observation of the Crab Nebula with the HAWC Gamma-Ray Observatory
• The major upgrade of the MAGIC telescopes, Part I: The hardware improvements and the commissioning of the system
• Simulation of Imaging Atmospheric Cherenkov Telescopes with CORSIKA and sim_telarray
• Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC
• On understanding the figures of merit for detection and measurement of x-ray polarization
• Impact of atmospheric parameters on the atmospheric Cherenkov technique
• Cosmic-Ray Background Flux Model based on a Gamma-Ray Large-Area Space Telescope Balloon Flight Engineering Model
• Background for a gamma-ray satellite on a low-Earth orbit
• MAGIC very large zenith angle observations of the Crab Nebula up to 100 TeV
• Monte Carlo Performance Studies for the Site Selection of the Cherenkov Telescope Array
• ROBAST: Development of a ROOT-Based Ray-Tracing Library for Cosmic-Ray Telescopes and its Applications in the Cherenkov Telescope Array
• Imaging the 511 keV positron annihilation sky with COSI
• Six years of VERITAS observations of the Crab Nebula
• A Run-Wise Simulation and Analysis Framework for Imaging Atmospheric Cherenkov Telescope Arrays
• The throughput calibration of the VERITAS telescopes
• The elusive Innermost Stable Circular Orbit: Now you see it, now you don't
• Extended Air Shower Simulations Based on EPOS

Cited by in corpus (1)

• H.E.S.S.: The High Energy Stereoscopic System