Table 1
Summary of sensitivities for the different instruments on board INTEGRAL, related to the detection of an impulsive event as the counterpart of LVT151012.
| Instrument | Energy range | 3σ sensitivity | ||||
| θ > 120 deg | 120 deg > θ > 80 deg | 80 deg > θ > FoV | Field of view | On-axis | ||
| (erg cm-2) | (erg cm-2) | (erg cm-2) | (erg cm-2) | (erg cm-2) | ||
|
|
||||||
| JEM-X | 3–30 keV | N/A | N/A | N/A | 2.6 × 10-7, 9.2 × 10-7 | 4.5 × 10-8, 1.6 × 10-7 |
| ISGRI | 20–200 keV | N/A | N/A | 2.3 × 10-7, 1.1 × 10-6 | 8.3 × 10-8, 1.8 × 10-7 | 3.5 × 10-8, 7.5 × 10-8 |
| PICsIT | 260–2600 keV | N/A | N/A | 8.6 × 10-7, 2.4 × 10-6 | 9.7 × 10-7, 1.9 × 10-6 | 4.4 × 10-7, 8.7 × 10-7 |
| SPI | 25–8000 keV | N/A | N/A | N/A | 1.6 × 10-6, 2.3 × 10-6 | 3.9 × 10-7, 5.7 × 10-7 |
| SPI-ACS | 75–2000 keV | 3.6 × 10-7, 10-6 | 2.2 × 10-7, 6 × 10-7 | 2 × 10-7, 5.3 × 10-7 | 3.5 × 10-7, 9.5 × 10-7 | 4.2 × 10-7, 1.4 × 10-6 |
| IBIS/Veto | 100–2000 keV | 8.7 × 10-7, 7.6 × 10-7 | 2.1 × 10-6, 1.9 × 10-6 | 1.7 × 10-6 | 2.7 × 10-6, 2.8 × 10-6 | N/A |
|
|
||||||
| Fraction of the | 48% | 12% | 19–36% | 4–19% | ||
| LVT151012 localization | ||||||
Notes. Average 3σ sensitivity for prompt events in the different regions of the sky, assuming two types of the transients: short-hard and long-soft; respectively left and right numbers. A short-hard burst is assumed to be 1 s long and characterized by a typical hard GRB spectrum, characterized by a Comptonized model (a parametrization of cutoff power-law power, see Gruber et al. 2014) with parameters α = −0.5, Epeak = 600 keV. The long burst has a duration of 8 s and a typical soft GRB spectrum, i.e., a smoothly broken power law (Band model, Band et al. 1993) with parameters α = −1, β = −2.5, Epeak = 300 keV.
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