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IBIS/PICsIT in-flight performances

G. Di Cocco·E. Caroli·E. Celesti·L. Foschini·F. Gianotti·C. Labanti·G. Malaguti·A. Mauri·E. Rossi·F. Schiavone·A. Spizzichino·J. B. Stephen·A. Traci·M. Trifoglio
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Abstract

PICsIT (Pixellated Imaging CaeSium Iodide Telescope) is the high energy detector of the IBIS telescope on-board the INTEGRAL satellite. PICsIT operates in the gamma-ray energy range between 175 keV and 10 MeV, with a typical energy resolution of 10% at 1 MeV, and an angular resolution of 12 arcmin within a \~100 square degree field of view, with the possibility to locate intense point sources in the MeV region at the few arcmin level. PICsIT is based upon a modular array of 4096 independent CsI(Tl) pixels, ~0.70 cm^2 in cross-section and 3 cm thick. In this work, the PICsIT on-board data handling and science operative modes are described. This work presents the in-flight performances in terms of background count spectra, sensitivity limit, and imaging capabilities.

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G. Di Cocco, E. Caroli, E. Celesti, L. Foschini, F. Gianotti, C. Labanti, G. Malaguti, A. Mauri, E. Rossi, F. Schiavone, A. Spizzichino, J. B. Stephen, A. Traci, M. Trifoglio. 2003-09-08. IBIS/PICsIT in-flight performances. https://doi.org/10.1051/0004-6361%3A20031346

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