Table 1
List of the most variable eRASS1 sources, sorted by the larger value between NEVσ and AMPσ.
| ID | IAU name | NEV a | NEVσb | AMPc | ![$\[\mathrm{AMP}_\sigma^d\]$](/articles/aa/full_html/2025/08/aa49355-24/aa49355-24-eq13.png) |
SCATT f | mcrg | object ID |
|---|---|---|---|---|---|---|---|---|
| 1e | 1eRASS J170249.4–484724 | 0.10 ± 0.01 | 12.4 | 433.2 ± 25.8 | 16.77 | 0.20(0.15, 0.27) | 588.4 | GX 339–4 LMXB |
| 2 | 1eRASS J090831.3–702611 | 21.09 ± 1.57 | 13.4 | 22.8 ± 4.0 | 5.77 | 0.49(0.43, 0.57) | 1.84 | GRB 200120A |
| 3 | 1eRASS J112114.4–603720 | 0.33 ± 0.03 | 11.7 | 130.5 ± 9.9 | 13.21 | 0.50(0.42, 0,61) | 83.73 | Cen X–3 HMXB |
| 4 | 1eRASS J011704.4–732630 | 0.11 ± 0.01 | 7.9 | 72.6 ± 5.6 | 12.84 | 0.60(0.47, 0.80) | 80.41 | SMC X–1 HMXB |
| 5 | 1eRASS J142756.0–002218 | 6.41 ± 0.50 | 12.8 | 35.7 ± 3.7 | 9.52 | 0.64(0.51, 0.83) | 0.23 | G 124–44, Eruptive Variable |
| 6 | 1eRASS J040940.7–075329 | 0.48 ± 0.05 | 9.3 | 78.3 ± 6.2 | 12.62 | 0.30(0.22, 0.42) | 59.55 | EI Eri, RS CVn |
| 7 | 1eRASS J034012.2–520708 | 17.65 ± 1.48 | 11.9 | 25.0 ± 5.0 | 5.03 | 0.53(0.45, 0.63) | 0.73 | UCAC4 190-003482, Star |
| 8 | 1eRASS J125736.7–691713 | 0.24 ± 0.02 | 11.2 | 123.4 ± 17.0 | 7.24 | 0.53(0.44, 0.65) | 94.04 | GR Mus, LMXB |
| 9 | 1eRASS J152039.9–570955 | 0.12 ± 0.01 | 8.6 | 173.5 ± 15.6 | 11.15 | 0.23(0.17, 0.31) | 162.33 | Cir X–1 HMXB |
| 10 | 1eRASS J121002.8+121512 | 2.97 ± 0.38 | 7.7 | 21.8 ± 2.4 | 9.01 | 0.83(0.61, 1.21) | 12.52 | Gaia DR3 3918904293185534080 |
| 11 | 1eRASS J121314.8–645231 | 0.99 ± 0.11 | 9.0 | 22.0 ± 3.2 | 6.89 | 0.55(0.46, 0.68) | 17.47 | 1ES 1210-64.6, HMXB |
| 12 | 1eRASS J165648.5–390539 | 0.90 ± 0.14 | 6.4 | 26.5 ± 3.0 | 8.86 | 0.42(0.32, 0.58) | 22.91 | CD-38 11343, Eruptive Variable |
Notes. a Normalised excess variance and corresponding error (NEVe). b Normalised excess variability in units of NEVe. c Maximum amplitude variability and corresponding error (AMPe). d Maximum amplitude variability in units of AMPe. e The variability is probably affected by pile-up (see Sect. 5.5.2). f SCATT_LO value and the 1 σ lower and upper values. g mean count rate in units: counts s−1.
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