TTM/COMIS is a wide-angle camera that uses a coded aperture mask to determine source location. It covers the energy range 2-30 keV with a 7.8 deg x 7.8 deg field of view FWHM. The geometric area is 655 sq-cm. It can achieve an angular resolution of 2 arcminutes and a time resolution of 1 s. The Galactic center region was imaged withthe TTM demonstrating the efficiency of coded mask telescopes observations in hard X-rays.
HEXE, or High Energy X-ray Experiment, employs a phoswich of sodium iodide and cesium iodide. It covers the energy range 15-200 keV with a 1.6 deg x 1.6 deg field of view FWHM. Each of the 4 identical detectors has a geometric area of 200 sq-cm. The maximum time resolution is 0.3-25 ms.
GSPC, also called Sirene 2, is a gas scintillation proportional counter. It covers the energy range 2-100 keV with a 3 deg x 3 deg field of view FWHM. The detector geometric area is 300 sq-cm. The instrument has a maximum time resolution of 1.25-2.5 ms.
Pulsar X-1 consists of 4 phoswich detectors which covers the energy range 50-800 keV with a 3 deg x 3 deg field of view FWHM. Each of the 4 identical detectors has 314 sq-cm geometric area. The maximum time resolution is 10 s.
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