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.
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

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