Table 2.
Properties of the two targets from eRASS:4.
| Target | RA | Dec | Error (a) |
 (b) |
b | Flux (c) | HR1(d) | HR2(d) | HR3(d) |
|---|---|---|---|---|---|---|---|---|---|
| eRASSU | [°] | [°] | [″] | [1020 cm−2] | [°] | ||||
| J065715.3+260428 | 104.3140 | 26.0746 | 1.3 | 8.3 | 12.75 | 2.21(26) | 0.33(11) | −0.79(9) | −1.00(26) |
| J131716.9−402647 | 199.3204 | −40.4462 | 0.9 | 6.7 | 22.16 | 4.52(28) | 0.42(6) | −0.83(4) | −0.92(18) |
Notes.
The listed positional accuracy was computed adding the combined statistical 1σ positional error (rc), estimated from maximum likelihood point spread function fitting (Brunner et al. 2022), with a systematic error of 0.6″ and a stretching factor of 1.1 via the equation 
. The later two values were estimated by cross-matching the eRASS:4 catalogue with the ‘astrometric selection’ sample derived from the Gaia DR3 qso_candidates table (Gaia Collaboration 2023a) and fitting the offset distribution with a Rayleigh function.
Galactic line-of-sight hydrogen column density (HI4PI Collaboration 2016).
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