Table 1: INTEGRAL payload: key parameters.
Parameter SPI IBIS
Energy range 18 keV-8 MeV 15 keV-10 MeV
Detector 19 Ge detectors, each ($6\times7$) cm 16384 CdTe dets, each ( $4\times4\times2$) mm
  cooled @ 85 K 4096 CsI dets, each ( $8.4\times8.4\times30$) mm
Detector area (cm2) 500 2600 (CdTe), 2890 (CsI)
Spectral resolution (FWHM) 3 keV @ 1.7 MeV 8 keV @ 100 keV
Continuum sensitivity 5.5 $\times$ 10-6 @ 100 keV 6 $\times$ 10-7 @ 100 keV
(photons cm-2 s-1 keV-1) 1.2 $\times$ 10-6 @ 1 MeV 5 $\times$ 10-7 @ 1 MeV
( $\Delta E = E/2$, 3$\sigma$, 106 s)    
Line sensitivity 3.3 $\times$ 10-5 @ 100 keV 1.9 $\times$ 10-5 @ 100 keV
(photons cm-2 s-1) 2.4 $\times$ 10-5 @ 1 MeV 3.8 $\times$ 10-4 @ 1 MeV
(3$\sigma$, 106 s)    
Field of view (fully coded) 16$^{\circ}$ (corner to corner) 9$^{\circ}$ $\times$ 9$^{\circ}$
Angular resolution (FWHM) 2.5$^{\circ}$ (point source) 12$^{\prime}$
Source location (radius) $\leq$1.3$^{\circ}$ (depending on source strength) $\leq$1$^{\prime}$ (for 10$\sigma$ source)
Absolute timing accuracy (3$\sigma$) $\leq$200 $\mu$s $\leq$200 $\mu$s
Mass (kg) 1309 746
Power [max/average] (W) 385/110 240/208
Parameter JEM-X OMC
Energy range 4 keV-35 keV 500 nm-600 nm
Detector Microstrip Xe/CH4-gas detector (1.5 bar) CCD + V-filter
Detector area (cm2) 500 for each of the two JEM-X detectorsa CCD: (2061 $\times$ 1056) pixels
    Imaging area (1024 $\times$ 1024) pixels
Spectral resolution (FWHM) 2.0 keV @ 22 keV -
Continuum sensitivityb 1.2 $\times$ 10-5 @ 6 keV -
(photons cm-2 s-1 keV-1) 1.3 $\times$ 10-5 @ 30 keV -
(3$\sigma$, 106 s)    
Line sensitivityb 1.9 $\times$ 10-5 @ 6 keV -
(photons cm-2 s-1) 8.5 $\times$ 10-5 @ 30 keV -
(3$\sigma$, 106 s)    
Limiting magnitude (mag) - 17.8
(3$\sigma$, 5000 s)    
Field of view (fully coded) 4.8$^{\circ}$ 5$^{\circ}$ $\times$ 5$^{\circ}$
Angular resolution (FWHM) 3$^{\prime}$ 25$^{\prime}$$^{\prime}$
10$\sigma$ source location (radius) $\leq$30$^{\prime}$$^{\prime}$ 6$^{\prime}$$^{\prime}$
Absolute Timing accuracy (3$\sigma$) $\leq$200 $\mu$s $\geq $1 s
Mass (kg) 65 17
Power [max/average] (W) 50/37 20/17
$\textstyle \parbox{16.3cm}{ $^a$\space At the moment, only one of the two JEM-X detectors is being operated.\\ $^b$\space Assumes operation of both detectors.}$

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