eROSITA – “extended ROentgen Survey with an Imaging Telescope Array” is a X-ray telescope designed by MPE, Germany, the main SRG scientific instrument.
PI of the telescope – Dr. Peter Predehl, MPE, Germany.
More information are available on official eROSITA site.
Main scientific objectives of eROSITA
- Perform all-sky survey in soft 0.5-2 keV and hard 2-10 keV bands with unprecedented sensitivity
- Discover and study about 100 thousands galactic clusters, bringing out all massive galactic clusters in observable Universe
- Unveil 3 millions active galactic nuclei, providing large samples for statistical studies and also making visible the three-dimensional structure of Universe
- Explore properties of peculiar Galactic sources: single neutron stars, supernova remnants, X-ray binaries, coronal active stars and protostars.
Main parameters
| Number of mirror modules | 7 |
| Number of mirror shells per each module | 54 |
| Mirror shell diameter | 76–358 mm |
| Mirror shell length | 300 mm |
| Angular resolution (HEW, Half energy Width) | 18″ (on-axis) to ~28″ (survey) at 1 keV |
| Field of view | 0.81 sq. degrees |
| Energy range | 0.3–11 keV |
| Focal length | 1600 mm |
| Mirror mater | nickel |
| Mirror coating | gold |
| Detectors | PNCCD, Si |
| Detector dimensions, mm | 28.8 x 28.8 mm |
| Pixel size | 75 x 75 µm |
| Energy resolution | 138 eV at 6 keV |
| Mass | 815 kg |
| Telescope diameter/length | 1.3 m / 2.6 m |
| Power | 405 W |
| Detector operating temperature | -95 C |
Scientific information of the Russian consortium
Science with eROSITA