Table 2.
Properties of the selected candidates.
| Source | RA | Dec | Error (a) | b | Pno-match(b) | Separation (c) | HR1 (d) | HR2 (d) | HR3 (d) | CTS (e) | Texp(f) | Magnitude (g) | Filter (h) | fX/fopt(i) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| eRASSU | [°] | [°] | [″] | [°] | [%] | [″] | [s] | limit [mag] | ||||||
| J052152.0−503812 | 80.467 | −50.6369 | 1.16 | −34.58 | 100 | 5.81″(5.01σ) | 0.44(0.08) | −0.37(0.08) | −0.96(0.07) | 232 | 3226 | 25.48 | r | 449 |
| J062748.5−260240 | 96.9523 | −26.0446 | 1.50 | −16.41 | 60 | 2.99″(2.00σ) | 0.3(0.14) | −0.52(0.15) | −1.0(0.15) | 64 | 964 | 21.73 | r | 14 |
| J065715.3+260428 (j) | 104.314 | 26.0746 | 1.31 | 12.75 | 100 | 15.15″(11.6σ) | 0.33(0.11) | −0.79(0.09) | −1.0(0.26) | 88 | 659 | 22.21 | r | 859 |
| J071828.7+141044 | 109.62 | 14.1789 | 2.05 | 12.31 | 84 | 5.32″(2.59σ) | 1.0(0.4) | 0.55(0.17) | −1.0(0.05) | 27 | 630 | 22.16 | r | 118 |
| J072302.3−194225 | 110.7599 | −19.7071 | 1.62 | −2.21 | 83 | 5.50″(3.40σ) | −0.22(0.15) | −0.98(0.12) | 0.7(1.3) | 53 | 764 | 21.93 | r | 22 |
| J072635.8−001642 | 111.6496 | −0.2785 | 2.52 | 7.69 | 91 | 6.24″(2.48σ) | 0.85(0.26) | 0.47(0.17) | −1.0(0.13) | 36 | 652 | 21.92 | r | 24 |
| J080701.3+023823 | 121.7558 | 2.6398 | 1.76 | 17.99 | 54 | 6.17″(3.51σ) | 0.52(0.16) | −0.23(0.17) | −0.85(0.28) | 47 | 598 | 24.50 | r | 512 |
| J080717.2−182019 | 121.8217 | −18.3387 | 1.95 | 7.53 | 52 | 2.90″(1.49σ) | 0.6(0.15) | −0.56(0.15) | −1.0(0.15) | 47 | 697 | 22.00 | r | 17 |
| J081952.1−131930 | 124.9672 | −13.3251 | 1.38 | 12.76 | 100 | 8.56″(6.21σ) | −0.88(0.07) | −1.0(0.23) | 1.0(5.0) | 78 | 677 | 22.99 | r | 146 |
| J083039.8+353102 | 127.6661 | 35.5172 | 1.96 | 34.67 | 100 | 7.79″(3.98σ) | 0.56(0.24) | 0.14(0.22) | −1.0(0.12) | 29 | 574 | 24.12 | r | 263 |
| J084046.2−115222 | 130.1926 | −11.873 | 1.65 | 17.82 | 79 | 7.18″(4.34σ) | −0.39(0.13) | −1.0(0.09) | 1.0(2.7) | 51 | 622 | 22.12 | r | 36 |
| J085257.5+270013 | 133.2399 | 27.0039 | 1.92 | 37.45 | 100 | 9.45″(4.91σ) | 0.58(0.19) | −0.14(0.18) | −0.95(0.11) | 40 | 577 | 24.56 | r | 425 |
| J085351.2+272536 | 133.4634 | 27.4268 | 2.42 | 37.75 | 86 | 7.57″(3.13σ) | 1.0(0.4) | 0.72(0.14) | −0.73(0.14) | 32 | 585 | 24.51 | r | 1217 |
| J090421.1−383956 | 136.0882 | −38.6656 | 1.60 | 5.50 | 100 | 7.09″(4.44σ) | 1.0(0.04) | −0.42(0.13) | −1.0(0.13) | 63 | 919 | 23.64 | r | 67 |
| J093317.6−251252 | 143.3236 | −25.2147 | 1.28 | 19.17 | 62 | 3.99″(3.13σ) | 0.42(0.13) | −0.22(0.13) | −0.84(0.13) | 94 | 695 | 22.35 | r | 75 |
| J100957.4+125914 | 152.4893 | 12.9873 | 2.92 | 49.75 | 50 | 6.71″(2.30σ) | 0.43(0.21) | −0.43(0.21) | −0.7(0.4) | 29 | 525 | 24.62 | r | 154 |
| J101110.9+083329 | 152.7957 | 8.5582 | 1.86 | 47.85 | 58 | 6.43″(3.45σ) | 0.42(0.21) | −0.16(0.2) | −1.0(0.1) | 36 | 542 | 24.63 | r | 223 |
| J103951.1+323442 | 159.9631 | 32.5785 | 2.35 | 61.07 | 100 | 11.40″(4.86σ) | 0.35(0.25) | 0.04(0.23) | −0.8(0.23) | 27 | 609 | 24.35 | r | 338 |
| J110240.2−250706 | 165.6678 | −25.1184 | 1.33 | 31.55 | 99 | 5.17″(3.88σ) | 0.35(0.11) | −0.47(0.12) | −0.78(0.2) | 104 | 815 | 24.65 | r | 606 |
| J113351.2−522712 | 173.4634 | −52.4535 | 1.18 | 8.63 | 80 | 2.96″(2.51σ) | 0.55(0.1) | −0.75(0.09) | −0.8(0.4) | 99 | 1672 | 23.37 | r | 55 |
| J121826.7+071144 | 184.6113 | 7.1956 | 2.28 | 68.59 | 56 | 4.52″(1.98σ) | 0.38(0.24) | 0.0(0.2) | −0.89(0.16) | 35 | 715 | 24.69 | r | 170 |
| J122150.6−193438 | 185.4611 | −19.5774 | 1.40 | 42.75 | 99 | 5.31″(3.79σ) | 0.6(0.12) | −0.38(0.12) | −0.9(0.13) | 85 | 1083 | 24.48 | r | 207 |
| J125214.5−591759 | 193.0606 | −59.2999 | 1.04 | 3.57 | 85 | 0.59″(0.57σ) | 0.47(0.08) | −0.84(0.06) | −0.7(0.4) | 164 | 1802 | 23.32 | r | 77 |
| J130406.1−533816 | 196.0256 | −53.6379 | 1.13 | 9.19 | 99 | 3.75″(3.32σ) | 0.44(0.08) | −0.86(0.06) | −0.7(0.4) | 147 | 1735 | 23.24 | r | 63 |
| J130821.3+130319 | 197.0891 | 13.0555 | 1.69 | 75.38 | 100 | 7.42″(4.39σ) | 0.58(0.15) | −0.13(0.15) | −1.0(0.13) | 75 | 1060 | 24.63 | r | 206 |
| J131716.9−402647 (j) | 199.3205 | −40.4464 | 0.83 | 22.16 | 100 | 5.16″(6.21σ) | 0.42(0.07) | −0.85(0.04) | −1.0(0.28) | 415 | 1464 | 24.88 | r | 10 801 |
| J133355.8−665647 | 203.4828 | −66.9466 | 0.81 | −4.42 | 65 | 1.64″(2.03σ) | 0.79(0.04) | −0.73(0.04) | −1.0(0.026) | 468 | 1836 | 23.31 | r | 188 |
| J134725.4−363415 | 206.8561 | −36.5709 | 1.31 | 24.95 | 99 | 4.50″(3.42σ) | −0.26(0.12) | −1.0(0.1) | 100 | 1376 | 25.00 | r | 381 | |
| J174858.8−510951 | 267.245 | −51.1642 | 0.92 | −11.83 | 100 | 5.60″(6.10σ) | 0.19(0.07) | −0.84(0.05) | −1.0(0.12) | 256 | 920 | 21.21 | g | 31 |
| J175415.0−740127 | 268.5625 | −74.0244 | 1.58 | −22.20 | 84 | 4.43″(2.81σ) | 0.41(0.15) | −0.27(0.15) | −0.83(0.19) | 66 | 1198 | 24.84 | r | 194 |
| J175532.5−503748 | 268.8858 | −50.6301 | 1.47 | −12.48 | 77 | 4.89″(3.33σ) | 0.72(0.09) | −0.87(0.07) | −1.0(0.5) | 82 | 846 | 21.33 | g | 11 |
| J183349.6−353707 | 278.4569 | −35.6188 | 2.18 | −12.12 | 56 | 4.49″(2.06σ) | 0.55(0.2) | −0.13(0.19) | −0.92(0.19) | 42 | 666 | 20.89 | g | 17 |
| J214920.9−443050 | 327.3374 | −44.514 | 1.77 | −49.85 | 53 | 4.29″(2.42σ) | 0.7(0.21) | 0.09(0.19) | −0.79(0.15) | 38 | 673 | 25.24 | r | 298 |
Notes. During the observations, eROSITA was operated in SURVEY mode.
1σ positional accuracy. Calculated as described in Table 2 of Kurpas et al. (2023).
Probability from the ARCHES cross-match that the eROSITA source has no counterpart in any of the wide area optical or IR catalogues.
Hardness ratio values. HR1 is computed between the 0.2–0.5 keV and 0.5–1 keV bands, HR2 between the 0.5–1 keV and 1–2 keV bands, and HR3 between the 1–2 keV and 2–5 keV bands.
Passband of the local magnitude limit. The term r refers to the Pan-STARRS, Legacy Survey, or DeCAPS2 r-band, whereas g marks magnitudes in the Gaia g-band. All magnitudes are given in the AB system.
The X-ray-to-optical flux ratio, in relation to the V-band, was computed via 
, with FX as the X-ray flux and m the local magnitude limit. See Sect. 3.4 for more details.
We list the derived properties for J06571 and J13171 also in this table, although they were already published in Kurpas et al. (2023) and Kurpas et al. (2024).
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