Table 4
Archival X-ray fluxes of UCDs and UCD candidates extracted from the 4XMM-DR9 and CSC 2.0 catalogs.
| Gaia DR2 designation | eRASS1 flux (10−14 erg cm−2 s−1) | 4XMM name | fluxBand9 (10−14 erg cm−2 s−1) | CSC 2.0 name | fluxaper,b |
|---|---|---|---|---|---|
| (10−14 erg cm−2 s−1) | |||||
| 3200303384927512960 | 8.10 ± 2.62 | J044023.6−053005 | 9.10 ± 0.48 | ||
| 666988221840703232 | 45.25 ± 26.27 | J075224.1+161210 | 19.15±1.18 | ||
| 703790044252850688 | 40.88 ± 7.66 | J082948.1+264624 | 37.42 ± 0.55 | ||
| 5761985432616501376 | 14.24 ± 4.41 | 2CXO J085335.8−032934 | 1.35 ± 0.15 | ||
| 38755 6154 481785 8816 | 42.95 ± 21.29 | J102044.0+081422 | 24.10 ± 1.35 | 2CXO J102043.8+081421 | 57.94 ± 2.29 |
| 5201352936175160448 | 8.20 ± 6.43 | J111022.1−762513 | 0.83 ± 0.07 | ||
| 6224387727748521344 | 3.71 ± 1.40 | 2CXO J145637.8−280957 | 3.34 ± 0.21 | ||
| 3754497583659096320 | 4.71 ± 2.61 | J103958.3−120 357 | 0.43 ± 0.18 |
Notes. These fluxes are based on a power-law model (see text in Sect. 6.3).
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