Open Access
Table B.1
Description of the columns in the published catalog
| Column | Unit | Description |
|---|---|---|
| ERO_IAUNAME | IAU name of the eRASS1 source (IAUNAME) | |
| ERO_MJD | modified julian date | Epoch of the observation of the eRASS1 source (MJD) |
| ERO_POS_ERR | arcsec | Positional uncertainty of the eRASS1 source (POS_ERR) |
| CTP_RANK | Rank of the counterpart that increase for less likely alternative counterparts | |
| CTP_ID | Identifier of the counterpart (source_id if Gaia source, otherwise combination of TYC1, TYC2, TYC3) | |
| CTP_SEP | arcsec | Proper motion corrected angular separation between eRASS1 source and counterpart |
| p_coronal | Probability of the eRASS1 source to be coronal | |
| p_ij | Probability of the counterpart to be associated to the eRASS1 source | |
| CTP_RA | deg | Proper motion corrected right ascension of the counterpart |
| CTP_DEC | deg | Proper motion corrected declination of the counterpart |
| Fx | erg cm-2 s-1 | X-ray flux in the 0.2 – 2.3 keV band assuming a coronal spectrum |
| G | mag | G band magnitude of the counterpart |
| BP_RP | mag | BP–RP color of the counterpart |
| PLX | mas | Parallax of the counterpart |
| SIMBAD_NAME | Name of the Simbad identification if available | |
| SIMBAD_OTYPE | Classification in the Simbad database if available | |
| TRAIN_SET | True if counterpart to an eRASS:4 training-set source | |
| CORONAL | False if the properties are untypical for coronal X-ray emitters | |
| OB_STAR | True for likely reddened OB stars | |
| FLAG_OPT | True if source is affected by optical loading, adopted from the eRASS1 catalog | |
| NWAY_DIFFCTP | True if NWAY provides a different best counterpart |
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