Table 3
Some key performance parameters of the eROSITA MAs as calibrated on ground: the on-axis angular resolution (HEW [arcsec]) is corrected for the detector resolution.
| TM1 | TM2 | TM3 | TM4 | TM5 | TM6 | TM7 | |
|---|---|---|---|---|---|---|---|
| HEW Al-Kα at 1.49 keV | 16.0 ± 0.2 | 15.5 ± 0.2 | 16.5 ± 0.2 | 15.9 ± 0.2 | 15.5 ± 0.2 | 15.6 ± 0.2 | 17.0 ± 0.2 |
| FWHM Al-Kα at 1.49 keV | ~9.3 | ~7.0 | ~7.9 | ~7.6 | ~8.5 | ~7.9 | ~9.2 |
| HEW Cu-Kα at 8.04 keV | 14.5 ± 0.2 | 15.1 ± 0.2 | 15.6 ± 0.2 | 16.3 ± 0.2 | 15.1 ± 0.2 | 16.2 ± 0.2 | 14.7 ± 0.2 |
| FWHM Cu-Kα at 8.04 keV | ~7.9 | ~7.5 | ~6.5 | ~7.6 | ~6.6 | ~7.8 | ~5.7 |
| Eff. Area at Al-Kα at 1.49 keV | 391 ± 22 | 393 ± 16 | 388 ± 19 | 369 ± 25 | 378 ± 19 | 392 ± 25 | 392 ± 16 |
| Eff. Area at Cu-Kα at 8.04 keV | 24.9 ± 1.1 | 25.1 ± 1.2 | 24.1 ± 0.6 | 23.8 ± 0.9 | 25.1 ± 1.1 | 25.0 ± 0.9 | 24.8 ± 0.8 |
Notes. The PSF has been measured also at C-K but is omitted here because it is almost identical to Al-K. The FWHM [arcsec] is an approximate value of the mirror–detector combination. The on-axis effective areas [cm2 ] were measured using the standard setup. Errors are 1σ for PSF and3σ for effective areas.
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