Open Access
Table 1
Overview of software tools, input parameters, and selection criteria.
| Level | Tool/criterion | Parameters |
|---|---|---|
| Observation | download_chandra_obsid | evt2, asol, bpix, msk |
| fluximage | energy range 0.3–2 keV | |
| encircling counts fraction = 0.393 | ||
| wavdetect | [1 2 4 6 8 12 16 24 32] (default) | |
| sigthresh = 10−6 (default) | ||
| ≥3σ significance threshold | ||
| Sources | dmextract | energy range 0.5–7 keV |
| 3σ region wavdetect, bkg annulus (2-3)rmax | ||
| specextract | 3σ region wavdetect, bkg annulus (2–3)rmax | |
| Criteria | NED cross-matching | 3″ radius; excluding star-like types |
| SIMBAD cross-matching | 3″ radius; excluding star-like object types | |
| Gaia cross-matching | 3″ radius | |
| STONKS cross-matching | 3″ radius | |
| eRASS1 cross-matching | 3″ radius | |
| Cumulative distribution | μupper > μlower + 0.5 + 0.2 | |
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