eFEDS_c001_main_ctp_clus_v2\.1\.fitsContent of the page.
Column Description of the catalog. First 17 columns are based on the input X-ray catalog (see Brunner+21) used for the searched for optical counter parts. Note "RA_CORR", "DEC_CORR" are the X-ray coordinates used for counter part search. Starting with "F_CONT_BEST_COMB" all following entries are related to the optical follow-up and are described in Klein+21 as well. Note "MASSPROX_BEST_COMB" is only a mass proxy based on the the count rate (ML_RATE), a bias and a redshift trend to true halo mass can be safely assumed. Note this table does not contain the additional X-ray quantities derived in Liu+21.
| Key | Value | Type | Comment |
|---|
| Name | Type | Unit | Description |
|---|---|---|---|
| Name | char[22] | None | Name |
| ID_SRC | int32 | None | Source ID |
| RA_CORR | float64 | None | Corrected RA (deg) |
| DEC_CORR | float64 | None | Corrected Dec (deg) |
| RADEC_ERR_CORR | float64 | None | Combined positional uncertainty (arcsec), corrected |
| EXT | float32 | arcsec | Source extent (arcsec) |
| EXT_ERR | float32 | arcsec | Extent error (arcsec) |
| EXT_LIKE | float32 | None | Extent likelihood |
| ML_CTS | float32 | None | Source net counts measured from count rate |
| ML_CTS_ERR | float32 | None | 1 sigma counts error |
| ML_RATE | float32 | count /s | Source count rate measured by PSF-fitting (counts/s) |
| ML_RATE_ERR | float32 | count /s | 1 sigma count rate error (counts/s) |
| ML_FLUX | float32 | erg /cm**2 /s | Source flux converted from count rate (erg/cm^2/s) |
| ML_FLUX_ERR | float32 | erg /cm**2 /s | 1 sigma flux error (erg/cm^2/s) |
| DET_LIKE | float32 | None | Detection likelihood measured by PSF-fitting |
| ML_BKG | float32 | count /arcmin**2 | Background flux at the source position (counts/arcmin^2) |
| ML_EXP | float32 | s | Vignetted exposure value (seconds) |
| inArea90 | bool | None | True if in the 0.2-2.3keV exp>500s region, which comprises 90% area |
| F_CONT_BEST_COMB | float64 | None | f_cont for the best counter part. Manually added groups have -1 (good) and -2 (less good) |
| Z_BEST_COMB | float64 | None | Photometric redshift of best counter part |
| SIGMA_Z_BEST_COMB | float64 | None | Uncertainty of the photometric redshift |
| LAMBDA_BEST_COMB | float64 | None | Richness of best counter part |
| ELAMBDA_BEST_COMB | float64 | None | Uncertainty on richness |
| SURV_BEST_COMB | int16 | None | Survey used: -1 group catalog, 1 LS, 2 HSC |
| RA_OPTCEN_BEST_COMB | float64 | None | Ra of optical center of best counter part |
| DEC_OPTCEN_BEST_COMB | float64 | None | Same but DEC |
| SPEC_Z_BEST_COMB | float64 | None | Spec-z |
| N_SPEC | float64 | None | Number of redshifts used for spec-z |
| MASSPROX_BEST_COMB | float64 | M_sol/h 10^14 | approx. M_500 used in MCMF |
| F_CONT_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| Z_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| LAMBDA_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| ELAMBDA_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| SIGMA_Z_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| SURV_2BEST_COMB | int16 | None | similar to *_BEST_COMB but for 2nd best candidate |
| MASSPROX_2BEST_COMB | float64 | M_sol/h 10^14 | approx. M_500 used in MCMF |
| FLAG_OPTICAL_X_POS | int16 | None | Value of the optical footprint map at X-ray position |
| MASKFRAC_3_FOOT | float64 | None | Fraction of the area not int the optical footprint within a 3' radius |
| MASKFRAC_3_FLAGGED | float64 | None | Similar but including flagged area due to bright star masks |
| MASKFRAC_R500_FOOT_BEST_COMB | float64 | None | Same as MASKFRAC_3_FOOT but for a r_500 sized region |
| MASKFRAC_R500_FLAGGED_BEST_COMB | float64 | None | Same as MASKFRAC_3_FLAGGED but for a r_500 sized region |
| MASKFRAC_R500_FOOT_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| MASKFRAC_R500_FLAGGED_2BEST_COMB | float64 | None | similar to *_BEST_COMB but for 2nd best candidate |
| RA_GDMAP_2BEST_COMB | float64 | None | Optical centre based on galaxy density map for 2nd best cand. |
| DEC_GDMAP_2BEST_COMB | float32 | None | Optical centre based on galaxy density map for 2nd best cand. |
| Alpha | float64 | None | Dynamical state estimator alpha |
| Delta | float64 | None | Dynamical state estimator delta |
| Beta | float64 | None | Dynamical state estimator beta |
| Ellip | float64 | None | Dynamical state estimator: model ellipticity |
| Centershift | float64 | None | Shift of the centre of the 2D density model with respect to X-ray position |
| DIST_NEXT_OPT_R500 | float64 | None | Distance to next optical structure in the galaxy density map in R_500 |
| DISTNEXT_XCLUST_MPC | float64 | None | Distance to next extent selectect eFEDS cluster in MPC |
| DISTNEXT_XCLUST_R500 | float64 | None | Distance to next extent selectect eFEDS cluster in R_500 |
| MCMF_NWAY_SECTOR | char[2] | None | Sector in f_cont vs P_any plane. See paper Sect. 5.4 |
The entries related the optical follow-up (e.g. redshifts, confirmation and dynamical state) are described in Klein et al. 2021(submitted)
The X-ray data and catalog creation is described in Brunner et. al. 2021(submitted)
The X-ray analysis of the extent selected sample that makes use of the redshift and providing additional X-ray information is described in Liu et al. 2021 (submitted)
The eROSITA data model structure for catalogues was branched from the SDSS data model for value added catalogues.