eROSITA Technical Performance
Basic parameter of the eRosita instruments | ||
number of mirror systems | 7 | |
number of nested mirror shells | 54 | |
HEW (Half energy Width) | 16" (on axis) to ~28" (survey) at 1 keV | |
energy range | 0.3 - 10 KeV | |
diameter of 1 mirror system | 358 mm | |
focal length | 1600 mm | |
material of mirror shells | nickel | |
mirror coating | gold | |
detector principle | framestore pn-CCD | |
size | 28.8 x 28.8 mm (61 arcmin diameter) | |
Pixel size | 75 x 75 μm | |
exposure time per frame | 50 msec | |
energy resolution | 138 eV at 6 keV | |
total weight of instrument | 810 kg | |
Size (diameter / length) | 1.3 m / 2.6 m | |
power consumption | 550 Watt | |
mission lifetime | > 7 years |

Red Curve: the PSF HEW as function of the offaxis angle in pointing mode.
Blue Curve: the PSF HEW within an encircled off-axis angle during a scan. Basically the value at 30′, is the cumulative PSF in the survey.
Blue Curve: the PSF HEW within an encircled off-axis angle during a scan. Basically the value at 30′, is the cumulative PSF in the survey.

The grasp of eROSITA compared with ROSAT-PSPC and XMM-Newton.

Predicted exposure map after the 4-years survey, based on the current mission scenario
eROSITA response matrices based on ground calibration measurements.
eROSITA background document.
© High-Energy Astrophysics Group at MPE