Broadband continuum sensitivity (ΔE = E/ 2) of the different instruments on board INTEGRAL as a function of energy for an on-axis detection of a 1 s impulsive event at 3σ confidence level during the time interval spanning from T0−30 s to T0 + 30 s. Dashed curves correspond to the case of an event at 1 Gpc featuring a spectral energy distribution typical of a hard GRB (Comptonized model with parameters α = −0.5, Epeak = 600 keV) and releasing a total of 3 × 1049 erg, 1050 erg, and 3 × 1050 erg in the 75–2000 keV energy band.
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