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Table 1
ART-XC characteristics.
| ART-XC key parameters | |
|---|---|
| Telescope mass | 350 kg |
| Dimensions | 3.5 × ⊘0.9 m |
| Power | 150 Watts |
| Energy range | 4–30 keV |
| Effective area for pointed observations | 385 cm2 at 8.1 keV(*) |
| Field of view | ~0.3 deg2 (⊘ = 36’) |
| Grasp | 43.8 cm2 deg2 at 8.1 keV |
| Angular resolution (FWHM) in the survey mode | |
| (limited by detector pixel size) | 53′′ |
| Detector efficiency | 50% at 4.6 keV, 86% at 8.1 keV |
| Energy resolution | 9% at 13.9 keV(**) |
| Time resolution | 23 μs |
| Dead time | 0.77 ms |
| ART-XC optics | |
| Number of MSs | 7 |
| Nominal focal length | 2700 mm |
| Defocusing | − 7 mm |
| Number of nested mirror shells | 28 |
| Form of shell | Wolter-I |
| Diameters of shells (intersection) | 49–145 mm |
| Thickness of shells | 0.25–0.35 mm |
| Material of shells | Ni/Co |
| Mirror coating | Ir (90% bulk density) |
| Entrance filter | 18.5 μm Mylar film with 0.11 μm Al layer |
| HPD on-axis, arcsec | 30–35″(***) |
| ART-XC detectors | |
| Detector type | CdTe Schottky Diode double sided strip |
| (Acrorad, Japan) | |
| CdTe crystal size | 29.95 × 29.95 × 1.00 mm |
| Working area | 28.56 × 28.56 mm |
| Number of strips | 48 × 48 |
| Strip width | 520 μm |
| Inter-strip distance | 75 μm |
| ASIC, 2 pcs. | VA64TA1 (Ideas, Norway) |
| Working energy range | 4–120 keV |
| Entrance window | Be, ⊘ 30 mm, thickness of 100 μm |
Notes. (*) Calibration Cu line, (**) Calibration 237Ne line, (***) See Table 3.
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