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Table 1
Overview parameters of the SRG observatory and its telescopes.
| Observatory | ||
|---|---|---|
| Orbit | Halo orbit around L2 point | |
| of the Sun–Earth system | ||
| Total mass | 2712 kg | |
| Power consumption | 1700 W | |
| Telemetry rate | 512 Kbit s−1 | |
| Pointing accuracy | 4′′ | |
| Observation modes: | a) all-sky survey | |
| b) scanning (up to 150 sq. deg) | ||
| c) triaxial pointing | ||
| Planned mission duration | 4 yr all-sky survey and | |
| >2 yr pointed/scanning obs. | ||
| Telescope | eROSITA | ART-XC |
| Energy range | 0.2–8 keV | 4–30 keV |
| Energy resolution | ~80 eV at 1.5 keV | 9% at 13.9 keV |
| FoV (FWZI) | ⊘ = 62′ | ⊘ = 36′ |
| Angular resolution | 30′′ HEW | 53′′ FWHM |
| (during survey) | ||
| Pixel angular size | 9.6′′ | 45′′ |
| Sensitivity | <μCrab | ~100μCrab |
| (4-yr all-sky survey) | ||
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