Open Access
Table A.1
eROSITA DR1 Variability catalogue column description.
| IAUNAME | String containing the official IAU name of the source |
| DETUID | String unique detection ID |
| SKYTILE | Sky tile ID |
| ID_SRC | Source ID in each sky tile. Use SKYTILE+ID_SRC to identify the corresponding source products |
| UID | Integer unique detection ID. It equals CatID×1011+SKYTILE×105+ID_SRC, where CatID is 1 for the 1B detected Main and Supp catalogues and 2 for the 3B detected Hard catalogue. |
| UID_Hard | Hard catalogue eUID of the source with a strong association or -UID if the association is weak. 0 means no counterpart is found in the Hard catalogue. Only in the 1B Main and Supp. catalogues |
| UID_1B | Main or Supp catalogue UID of the source with a strong association, or -UID if the association is weak. 0 means no counterpart is found in the 1B catalogues. Only in the Hard catalogue |
| ID_CLUSTER | Group ID of simultaneously fitted sources |
| RA | Right ascension (ICRS), corrected. |
| DEC | Declination (ICRS), corrected. |
| RA_RAW | Right ascension (ICRS), uncorrected. |
| DEC_RAW | Declination (ICRS), uncorrected. |
| RA_LOWERR | 1-σ lower error of RA. |
| RA_UPERR | 1-σ upper error of RA. |
| DEC_LOWERR | 1-σ lower error of DEC. |
| DEC_UPERR | 1-σ upper error of DEC. |
| RADEC_ERR | Combined positional error, raw output from PSF fitting. |
| POS_ERR | 1-σ position uncertainty. |
| LII | Galactic longitude. |
| BII | Galactic latitude. |
| ELON | Ecliptic longitude. |
| ELAT | Ecliptic latitude. |
| MJD | Modified Julian Date of the observation of the source nearest to the optical axis of the telescope. |
| MJD_MIN | Modified Julian Date of the first observation of a source. |
| MJD_MAX | Modified Julian Date of the last observation of a source. |
| EXT | Source extent parameter. |
| EXT_ERR | 1-σ error of EXT. |
| EXT_LOWERR | 1-σ lower error of EXT. |
| EXT_UPERR | 1-σ upper error of EXT. |
| EXT_LIKE | Extent likelihood. |
| DET_LIKE | Detection likelihood. |
| ML_CTS | Source net counts. |
| ML_CTS_ERR | 1-σ combined counts error. |
| ML_CTS_LOWERR | 1-σ lower counts error. |
| ML_CTS_UPERR | 1-σ upper counts error. |
| ML_RATE | Source count rate. |
| ML_RATE_ERR | 1-σ combined count rate error. |
| ML_RATE_LOWERR | 1-σ lower count rate error. |
| ML_RATE_UPERR | 1-σ upper count rate error. |
| ML_FLUX | Source flux. |
| ML_FLUX_ERR | 1-σ combined flux error. |
| ML_FLUX_LOWERR | 1-σ lower flux error. |
| ML_FLUX_UPERR | 1-σ upper flux error. |
| FLAG_SP_SNR | Source may lie within an overdense region near a supernova remnant. |
| FLAG_SP_BPS | Source may lie within an overdense region near a bright point source. |
| FLAG_SP_SCL | Source may lie within an overdense region near a stellar cluster. |
| FLAG_SP_LGA | Source may lie within an overdense region near a local large galaxy. |
| FLAG_SP_GC_CONS | Source may lie within an overdense region near a galaxy cluster. |
| FLAG_NO_RADEC_ERR | Source contained no RA_DEC_ERR in the pre-processed version of the catalogue. |
| FLAG_NO_CTS_ERR | Source contained no ML_CTS_0_ERR in the pre-processed version of the catalogue. |
| FLAG_NO_EXT_ERR | Source contained no EXT_ERR in the pre-processed version of the catalogue. |
| NDATA | Number of data points in the light curve. |
| AMPL | Maximum Amplitude variability (see Sect. 4.2). |
| e_AMPL | Uncertainty on Maximum Amplitude Variability (see Sect. 4.2). |
| s_AMPL | The ratio between AMP and e_AMP (see Sect. 4.2). |
| NEV | Normalised excess variance (see Sect. 4.2). |
| e_NEV | Uncertainty on Normalised excess variance (see Sect. 4.2). |
| s_NEV | The ratio between NEV to e_NEV (see Sect. 4.2). |
| SCATT | σbexvar (see Sect. 4.2). |
| SCATT_LO | lower 10% quantile of σbexvar (see Sect. 4.2). |
| SCATT_HI | higher 10% quantile of σbexvar (see Sect. 4.2). |
| 4XMM_SourceID | Corresponding ID in the 4XMM catalogue. |
| 4XMM_RAJ2000 | Rigth Ascension of the source in the 4XMM catalogue. |
| 4XMM_DEJ2000 | Declination of the source in the 4XMM catalogue. |
| Sep_eRO_4XMM | Separation between the eROSITA source and the corresponding 4XMM source. |
| 2SXPS_ID | Numerical unique source identifier within 2SXPS. |
| 2SXPS_RAJ2000 | Right Ascension (J2000) of the source in the 2SXPS catalogue. |
| 2SXPS_DEJ2000 | Declination (J2000) of the source in the 2SXPS catalogue. |
| Sep_eRO_2SXPS | Separation between the eROSITA source and the corresponding 2SXPS source. |
| 2RXS_SourceID | Numerical unique source identifier within ROSAT/2RXS. |
| 2RXS_RAJ2000 | Right Ascension (J2000) of the source in the ROSAT/2RXS catalogue. |
| 2RXS_DEJ2000 | Declination (J2000) of the source in the ROSAT/2RXS catalogue. |
| Sep_eRO_2RXS | Separation between the eROSITA source and the corresponding ROSAT/2RXS source. |
| CSC2p1_SourceID | Numerical unique source identifier within CSC2.1 catalogue. |
| CSC2p1_RAJ2000 | Right Ascension (J2000) of the source in the CSC2.1 catalogue. |
| CSC2p1_DEJ2000 | Declination (J2000) of the source in the CSC2.p catalogue. |
| Sep_eRO_CSC2p1 | Separation between the eROSITA source and the corresponding CSC2.1 source. |
| Hamstar_SourceID | Corresponding Gaia DR3 in the Hamstar catalogue. |
| CSC2p1_RAJ2000 | Rigth Ascension of the Hamstar source in the Gaia DR3 catalogue. |
| CSC2p1_DEJ2000 | Declination of the Hamstar source in the Gaia DR3 catalogue. |
| Sep_eRO_Hamstar | Separation between the eROSITA source and the corresponding Gaia DR3 in the Hamstar catalogue. |
| GDR3_SourceID | CCorresponding ID from Salvato et al 2025 in Gaia DR3 catalogue. |
| GDR3_RAJ2000 | Rigth Ascension of the source in the Gaia DR3 catalogue. |
| GDR3_DEJ2000 | Declination of the source in the Gaia DR3 catalogue. |
| Sep_eRO_GDR3 | Separation between the eROSITA source and the corresponding Gaia DR3 in the Salvato et al 2025 catalogue. |
| BSC5_SourceID | CCorresponding ID from Salvato et al 2025 in BSC5 catalogue. |
| BSC5_RAJ2000 | Rigth Ascension of the source in the Gaia DR3 catalogue. |
| BSC5_DEJ2000 | Declination of the source in the Gaia DR3 catalogue. |
| Sep_GDR3_BSC5 | Separation between the Gaia GDR3 counterpart of the eROSITA source and the corresponding BSC5 source. |
| VV_SourceID | CCorresponding ID from Salvato et al 2025 in the Veron & Veron catalogue. |
| VV_RAJ2000 | Rigth Ascension of the source in the Veron & Veron catalogue. |
| VV_DEJ2000 | Declination of the source in the Veron & Veron catalogue. |
| Sep_GDR3_VV | Separation between the Gaia GDR3 counterpart of the eROSITA source and the corresponding Veron & Veron source. |
| LMXB_SourceID | CCorresponding ID from Salvato et al 2025 in the LMXB catalogue. |
| LMXB_RAJ2000 | Right Ascension of the source in the LMXB catalogue. |
| LMXB_DEJ2000 | Declination of the source in the LMXB catalogue. |
| Sep_GDR3_LMXB | Separation between the Gaia GDR3 counterpart of the eROSITA source and the corresponding LMXB source. |
| HMXB_SourceID | CCorresponding ID from Salvato et al 2025 in the HMXB catalogue. |
| HMXB_RAJ2000 | Right Ascension of the source in the LMXB catalogue. |
| HMXB_DEJ2000 | Declination of the source in the HMXB catalogue. |
| Sep_GDR3_HMXB | Separation between the Gaia GDR3 counterpart of the eROSITA source and the corresponding HMXB source. |
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