eFEDS value-added catalogue
Description
The LOFAR-eFEDS value added catalogue (Igo et al. 2024) contains the 36,631 LOFAR 144-MHz detected radio sources in the eROSITA/eFEDS field (only 'inArea90', i.e. where the vignetted exposure time exceeds 500s). Legacy Survey DR9 optical counterparts are available, as well as host galaxy information from the GAMA09 survey (e.g. spectroscopic redshift, stellar mass, star formation rate) for those sources with counterparts in these catalogues. All (mass-complete) radio AGN in the GAMA09 field (flagged as 'G9_radioAGN') have been visually inspected to verify their counterpart association and their radio morphology. This subsample forms the basis of the work in Igo et al. 2024. 'FRII_flag' can be used to identify sources with FRII morphology; 'GRG_flag' can be used to identify giant radio galaxies. 'G9_radioXray_sources' mark the subset of radio sources which also have an eROSITA/eFEDS X-ray counterpart. For further information, see Appendix A of Igo et al. 2024.
Column descriptions
| Column | Units | Description |
|---|---|---|
| LOFAR_Source_id | Unique number that identifies the source | |
| LOFAR_RA | degrees | Right ascension of the source (for the equinox of the image) |
| LOFAR_DEC | degrees | Declination of the source (for the equinox of the image) |
| LOFAR_Total_Flux | Jy | Total, integrated Stokes I flux density of the source at the reference frequency |
| LOFAR_E_Total_Flux | Jy | 1σ error on the total flux density of the source |
| LOFAR_Peak_Flux | Jy/beam | Peak Stokes I flux density per beam of the source |
| LOFAR_E_Peak_Flux | Jy/beam | 1σ error on the peak flux density per beam of the source |
| LOFAR_Maj | degrees | FWHM of the major axis of the source |
| LOFAR_pos_err | degrees | Positional error |
| LOFAR_scodeS_flag | bool | True if LOFAR_S_code=S, i.e. fit with only a single Gaussian by PyBDSF |
| LOFAR_fluxratio_flag | bool | True if LOFAR_Total_Flux/LOFAR_Peak_Flux <3.6 |
| LOFAR_maj_flag | bool | True if LOFAR_Maj <19.1 arcsec |
| LOFAR_isolated_flag | bool | True if no nearest neighbours within 45 arcsec |
| LOFAR_compact_flag | bool | True: compact source; all four flags above are True. False: complex source. |
| LS9_UNIQUE_OBJID | Unique source identifier: BRICKID_OBJID (RELEASE=9010 for sources present here) | |
| LS9_TYPE | Morphological model | |
| LS9_RA | degrees | Right ascension at equinox J2000 |
| LS9_DEC | degrees | Declination at equinox J2000 |
| LS9_pos_err | degrees | Positional error |
| LS9_mag_g_dered | mag | De-reddened g-band magnitude |
| LS9_mag_r_dered | mag | De-reddened r-band magnitude |
| LS9_mag_z_dered | mag | De-reddened z-band magnitude |
| LS9_mag_W1_dered | mag | De-reddened W1-band magnitude |
| LS9_mag_W2_dered | mag | De-reddened W2-band magnitude |
| LS9_mag_W3_dered | mag | De-reddened W3-band magnitude |
| LS9_mag_W4_dered | mag | De-reddened W4-band magnitude |
| CTP_Separation | arcsec | Separation between LOFAR source and best-match LS9 counterpart |
| p_i | Probability for the counterpart to be the correct one | |
| p_any | Probability for a source to have any counterpart in the search region. Optimal: p_any >0.06 | |
| uberID | Unique GAMA ID of object | |
| CATAID | Unique numeric GAMA object identifier | |
| RAcen | degrees | Right Ascension of flux-weighted centre (ICRS) |
| Deccen | degrees | Declination of flux-weighted centre (ICRS) |
| Z | Spectroscopic redshift | |
| StellarMass_50 | solMass | Median stellar mass from MCMC chain |
| StellarMass_16 | solMass | 16th percentile stellar mass from MCMC chain |
| StellarMass_84 | solMass | 84th percentile stellar mass from MCMC chain |
| SFR_50 | solMass/year | Median SFR from MCMC chain |
| SFR_16 | solMass/year | 16th percentile SFR from MCMC chain |
| SFR_84 | solMass/year | 84th percentile SFR from MCMC chain |
| SC | Science sample class. SC >=6 is used here | |
| radioAGN_flag | bool | True if LOFAR source (with SNR > 5, p_any >0.06) fulfils radio-excess criterion |
| vis_inspected | bool | True if source has been visually inspected |
| G9_radioAGN | bool | Final sample of mass-complete G9 radio AGN, with visual inspection results applied |
| FRII_flag | FRII_flag =1, 0.5, 0: secure, likely, unlikely FRII-morphology, respectively | |
| GRG_flag | bool | Giant radio galaxy flag (largest linear size >0.7 Mpc) |
| G9_radioXray_sources | bool | True if the LOFAR source has an X-ray match in eROSITA eFEDS |
| special_flag | bool | True if source required special cross-matching and/or property estimation |