Ubertini, P., Bazzano, A., Natalucci, L., Lebrun, F., Goldwurm, A., Laurent, P., Mirabel, I. F., Vigroux, L., Di Cocco, G., Caroli, E., Labanti, C., Bassani, L., Bird, A. J., Broenstad, K., Denis, M., Reglero, V., Sabau, L., Sacco, B., and Staubert, R.
ABSTRACT The Imager on-Board INTEGRAL Satellite (IBIS) is the high resolution Gamma-Ray imaging telescope on board INTEGRAL. Its scientific goal is to address, complemented by the high resolution Spectrometer (SPI), astrophysical processes from celestial sources and diffuse regions in the X and Gamma-ray domain. IBIS is an essential element with its powerful diagnostic capabilities of fine imaging source identification and spectral sensitivity to both continuum and broadened lines. It will observe, simultaneously with the other instruments on board INTEGRAL, celestial objects of all classes ranging from the most compact galactic systems to extragalactic objects. The telescope features a coded aperture mask and a novel large area (∼,3,000 cm²) multilayer detector which utilises both Cadmium Telluride (16,384 detectors) and Caesium Iodide elements (4,096 detectors) to provide the fine angular resolution ∼12 arcmin , wide spectral response (20 keV to 10 MeV), high resolution timing (60 µs) and spectroscopy (6% at 100 keV) required to satisfy the mission's imaging objectives. [ABSTRACT FROM AUTHOR]