Chen, Andrew W.Andrew W.ChenArgan, A.A.ArganBulgarelli, A.A.BulgarelliPittori, CarlottaCarlottaPittoriGiommi, PaoloPaoloGiommiLucarelli, FabrizioFabrizioLucarelliSantolamazza, P.P.SantolamazzaVerrecchia, FrancescoFrancescoVerrecchia2020-09-172020-09-172012-09-01https://hdl.handle.net/20.500.13025/2970Space Telescopes and Instrumentation 2012 Ultraviolet to Gamma Ray. Proceedings of the SPIE, Volume 8443, article id. 84434E, (2012).AGILE is a gamma/X-ray telescope which has been in orbit since 23 April 2007. The gamma-ray detector, AGILE-GRID, has observed Galactic and extragalactic sources, many of which were collected in the first AGILE Catalog. We present the calibration of the AGILE-GRID using in-flight data and updated Monte Carlo simulations, producing response matrices for the effective area, energy dispersion, and point spread dispersion as a function of pointing direction in instrument coordinates and energy. We performed Monte Carlo simulations in GEANT3 at different gamma-ray photon energies and incident angles, using Kalman filter-based photon reconstruction and on-board and on-ground filters. Long integrations of in-flight observations of the Vela, Crab and Geminga sources in broad and narrow energy bands were used to validateconference paper10.1117/12.926195http://www.aanda.org/articles/aa/abs/2013/10/aa21767-13/aa21767-13.html2012SPIE.8443E..4EC