AGILESim: Monte Carlo Simulation of the AGILE Gamma-Ray Telescope
Autor: | A. Rappoldi, A. Argan, Andrea Bulgarelli, I. Donnarumma, A. W. Chen, Alessio Aboudan, M. Galli, S. Sabatini, Francesco Longo, N. Parmiggiani, Valentina Fioretti, A. Giuliani, Marco Tavani, Martino Marisaldi, P. W. Cattaneo |
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Přispěvatelé: | Fioretti, V., Bulgarelli, A., Tavani, M., Sabatini, S., Aboudan, A., Argan, A., Cattaneo, P. W., Chen, A. W., Donnarumma, I., Longo, F., Galli, M., Giuliani, A., Marisaldi, M., Parmiggiani, N., Rappoldi, A. |
Jazyk: | angličtina |
Rok vydání: | 2020 |
Předmět: |
010504 meteorology & atmospheric sciences
Astrophysics::High Energy Astrophysical Phenomena Pipeline (computing) Gamma-ray telescopes Monte Carlo method FOS: Physical sciences Astronomy simulations 01 natural sciences Astronomical instrumentation Computational science Spitzer Space Telescope 0103 physical sciences Angular resolution Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics 0105 earth and related environmental sciences Physics Detector Astrophysics::Instrumentation and Methods for Astrophysics Astronomy and Astrophysics Kalman filter Astronomical simulations Space and Planetary Science Astrophysics - Instrumentation and Methods for Astrophysics Energy (signal processing) Fermi Gamma-ray Space Telescope |
Popis: | The accuracy of Monte Carlo simulations in reproducing the scientific performance of space telescopes (e.g. angular resolution) is mandatory for a correct design of the mission. A brand-new Monte Carlo simulator of the Astrorivelatore Gamma ad Immagini LEggero (AGILE)/Gamma-Ray Imaging Detector (GRID) space telescope, AGILESim, is built using the customizable Bologna Geant4 Multi-Mission Simulator (BoGEMMS) architecture and the latest Geant4 library to reproduce the instrument performance of the AGILE/GRID instrument. The Monte Carlo simulation output is digitized in the BoGEMMS postprocessing pipeline, according to the instrument electronic read-out logic, then converted into the onboard data handling format, and finally analyzed by the standard mission on-ground reconstruction pipeline, including the Kalman filter, as a real observation in space. In this paper we focus on the scientific validation of AGILESim, performed by reproducing (i) the conversion efficiency of the tracker planes, (ii) the tracker charge readout distribution measured by the on-ground assembly, integration, and verification activity, and (iii) the point-spread function of in-flight observations of the Vela pulsar in the 100 MeV - 1 GeV energy range. We measure an in-flight angular resolution (FWHM) for Vela-like point sources of $2.0^{+0.2}_{-0.3}$ and $0.8^{+0.1}_{-0.1}$ degrees in the 100 - 300 and 300 - 1000 MeV energy bands, respectively. The successful cross-comparison of the simulation results with the AGILE on-ground and in-space performance validates the BoGEMMS framework for its application to future gamma-ray trackers (e.g. e-ASTROGAM and AMEGO). |
Databáze: | OpenAIRE |
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