J/A+A/698/A132 eFEDS. X-ray sources SDSS spectroscopic obs. (Aydar+, 2025)
The eROSITA Final Equatorial Depth Survey (eFEDS).
SDSS spectroscopic observations of X-ray sources.
Aydar C., Merloni A., Dwelly T., Comparat J., Salvato M., Buchner J.,
Brusa M., Liu T., Wolf J., Anderson S.F., Andonie C.P., Bauer F.E.,
Blanton M.R., Brandt W.N., Diaz Y., Hernandez-Garcia L., Kim D.-W.,
Miyaji T., Morrison S., Musiimenta B., Negrete C.A., Ni Q., Ricci C.,
Schneider D.P., Schwope A., Shen Y., Waddell S.G.H., Arcodia R., Bizyaev D.,
Burchett J.N., Chakraborty P., Covey K., Gaensicke B.T., Georgakakis A.,
Green P.J., Ibarra H., Ider-Chitham J., Koekemoer A.M., Kollmeier J.A.,
Krumpe M., Lamer G., Malyali A., Nandra K., Pan K., Pizarro C.R.,
Sanchez-Gallego J., Trump J.R., Urrutia T.
<Astron. Astrophys. 698, A132 (2025)>
=2025A&A...698A.132A 2025A&A...698A.132A (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Redshifts ; Spectroscopy ; Active gal. nuclei
Keywords: techniques: spectroscopic - catalogs - galaxies: active -
galaxies: evolution - quasars: emission lines
Abstract:
We present one of the largest uniform optical spectroscopic surveys of
X-ray selected sources to date observed as a pilot study for the Black
Hole Mapper survey (BHM). The BHM program of the Sloan Digital Sky
Survey (SDSS)-V is designed to provide optical spectra for hundreds of
thousands of X-ray selected sources from the SRG/eROSITA all-sky
survey, significantly improving our ability to classify and
characterize the physical properties of large statistical populations
of X-ray emitting objects. Our sample consists of 13079 sources in
the eROSITA eFEDS performance verification field, among which 12011
provide reliable redshifts from 0<z<5.8. The vast majority of
these objects were detected as point-like sources (X-ray flux limit
F0.5-2keV>6.5x1015erg/s/cm2) and observed, over about
twenty years, with fiber-fed SDSS spectrographs. After including all
available redshift information for the eFEDS sources from the
dedicated SDSS-V plate programme and archival data, we visually
inspected the SDSS optical spectra to check the reliability of these
redshift measurements, as well as the performance of the SDSS
pipeline. The visual inspection allowed both the recovery of reliable
redshifts (for 99% of SNR> 2 spectra) and the assignment of classes to
the sources, where we confirm that the vast majority of our sample
consists of active galactic nuclei (AGN), with only ∼3% of the
eFEDS/SDSS sources being Galactic objects. We analyse the completeness
and purity of the spectroscopic redshift catalogue, with the
spectroscopic completeness rising from 48% (full sample) to 81% for a
cleaner, brighter (rAB<21.38) sample defined considering high X-ray
detection likelihood, reliable counterpart association, and optimal
sky coverage. We also showcase the diversity of the optical spectra of
the X-ray-selected AGN, and provide high signal-to-noise ratio
spectral stacks in various sub-samples of different redshift and
optical broad-band colours. Our AGN sample contains optical spectra of
(broad-line) quasars, narrow-line galaxies, and optically passive
galaxies, showing considerable diversity in colours and levels of
nuclear obscuration.
Description:
The file catalog.dat is a compilation of the works by Brunner et al.
(2022, Cat. J/A+A/661/A1), Salvato et al. (2022, Cat. J/A+A/661/A2),
Liu et al. (2022, Cat. J/A+A/661/A5), and Almeida et al.
(2023ApJS..267...44A 2023ApJS..267...44A), with the data that was considered for the plots
of Aydar et al. (2025). It contains data from 27369 sources detected
with eROSITA-DE Brunner et al. (2022, J/A+A/661/A1), their optical
counterparts from public photometric data (Salvato et al. 2022, Cat.
J/A+A/661/A2) and the results for the eROSITA X-ray analysis for the
AGN in the sample (Liu et al. 2022, J/A+A/661/A5). The SDSS data is
described in Almeida et al. (2023ApJS..267...44A 2023ApJS..267...44A) and previous data
release papers of SDSS. Additionally, we include information from the
visual inspection of the data, as described in Aydar et al. (2025).
The file spectra.dat contains the eFEDS spectroscopic compilation,
with information about the SDSS observations, the photometric
counterparts, and the assessment of redshift, class and quality of the
visual inspection for each object.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 2148 27369 X-ray, photometric counterpart, optical spectra,
and visual inspection results for the
point-like X-ray selected sources at eFEDS
spectra.dat 498 334258 Spectroscopic compilation and visual inspection
results for the eFEDS sample
--------------------------------------------------------------------------------
See also:
J/A+A/661/A1 : The eFEDS X-ray catalogs (V7.4) (Brunner+, 2022)
J/A+A/661/A2 : Galaxy clusters and groups in eFEDS (Liu+, 2022)
J/A+A/661/A3 : eFEDS counterparts to point-like sources (Salvato+, 2022)
J/A+A/661/A5 : The eFEDS AGN catalog (Liu+, 2022)
J/A+A/661/A7 : X-ray properties of eFEDS clusters and groups (Bahar+, 2022)
J/A+A/661/A8 : eFEDS catalogue of variable X-ray sources (Boller+, 2022)
J/A+A/661/A10 : eFEDS galaxy clusters and groups in disguise (Bulbul+, 2022)
J/A+A/661/A11 : eFEDS. Masses of galaxy clusters and groups (Chui+, 2022)
J/A+A/661/A14 : Properties of eFEDS shear-selected clusters (Ramos-Ceja+, 2022)
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- Name eROSITA official source Name
(ERO_Name) (1)
24- 28 I5 --- ID-SRC ?=- ID of eROSITA source in the
Main Sample (EROIDSRC) (1)
30- 44 F15.11 deg RAcdeg Right Ascension (J2000) of eROSITA
source (corrected)
(ERORACORR) (1)
46- 60 F15.11 deg DEcdeg Declination (J2000) of eROSITA
source (corrected)
(ERODECCORR) (1)
62- 70 F9.6 arcsec ePosc eROSITA positional uncertainty
(corrected)
(ERORADECERR_CORR) (1)
72- 83 E12.6 mW/m2 MLFlux 0.2-2.3 keV source flux
(EROMLFLUX) (1)
85- 96 E12.6 mW/m2 e_MLFlux ?=- 0.2-2.3 keV source flux error
(1 sigma) (EROMLFLUX_ERR) (1)
98- 109 E12.6 --- DetLike 0.2-2.3 keV detection likelihood
via PSF-fitting (ERODETLIKE) (1)
111- 121 A11 --- CtpLS8 LS8 unique id for ctp to the
eROSITA source
(CTPLS8UNIQUE_OBJID) (2)
123- 137 F15.11 deg RALdeg Right Ascension (J2000) of the LS8
counterpart (CTPLS8RA) (2)
139- 153 F15.11 deg DELdeg Declination (J2000) of the best
LS8 counterpart (CTPLS8DEC) (2)
155- 163 F9.6 arcsec DistLE Separation between ctp and eROSITA
position (DistCTPLS8_ERO) (2)
165 I1 --- CtpQuality Counterpart quality: 4=best,
3=good,2=secondary, 1/0=unreliable
(CTP_quality) (2)
167 I1 --- Nzsp ?=- Total number of spec-z
associated with this lsdr9 object
(SPECZ_N)
169- 183 F15.11 deg RAzdeg ?=- Coordinate of spec-z,
propagated if necessary to epoch
J2000 (SPECZ_RAJ2000)
185- 199 F15.11 deg DEzdeg ?=- Coordinate of spec-z,
propagated if necessary to epoch
J2000 (SPECZ_DEJ2000)
201 I1 --- Nzspsel ?=- Number of spec-z selected to
inform result for this object
(SPECZ_NSEL)
203- 211 F9.6 --- zsp ?=- Final redshift determined for
this object (SPECZ_REDSHIFT)
213- 214 I2 --- spzNormQ ?=- Final normalised redshift
quality associated with this
object (SPECZ_NORMQ)
216- 222 A7 --- spzNormC Final normalised classification
determined for this object
(SPECZ_NORMC)
224 I1 --- spzHasVi True if best spec-z for this object
has a visual inspection
(SPECZ_HASVI)
226- 234 A9 --- spzCatCode Catalogue code of best spec-z for
this object (SPECZ_CATCODE)
236- 241 I6 --- spzBitMask ?=- Bitmask encoding catalogues
containing spec-z for this object
(SPECZ_BITMASK)
243- 247 I5 --- spzSelBitMask ?=- Bitmask encoding catalogues
containing informative spec-z for
object (SPECZSELBITMASK)
249 I1 --- spzFlags ?=- Bitmask encoding quality flags
for this object (SPECZ_FLAGS)
251- 252 I2 --- spzSelNormQMax ?=- Highest NORMQ of informative
spec-z for this object
(SPECZSELNORMQ_MAX)
254- 255 I2 --- spzSelNormQMean ?=- Mean NORMQ of informative
spec-z for this object
(SPECZSELNORMQ_MEAN)
257- 265 F9.6 --- spzSelzmean ?=- Mean REDSHIFT of informative
spec-z for this object
(SPECZSELZ_MEAN)
267- 275 F9.6 --- spzSelzmed ?=- Median REDSHIFT of informative
spec-z for this object
(SPECZSELZ_MEDIAN)
277- 284 F8.6 --- spzSelzstddev ?=- Standard deviation of REDSHIFTs
for informative spec-z for object
(SPECZSELZ_STDDEV)
286- 300 F15.11 deg RAOdeg ?=- Coordinate associated with
individual spec-z measurement
(SPECZORIGRA)
302- 316 F15.11 deg DEOdeg ?=- Coordinate associated with
individual spec-z measurement
(SPECZORIGDEC)
318- 323 F6.1 --- EpochO ?=- Coordinate epoch associated
with individual spec-z measurement
(SPECZORIGPOS_EPOCH)
325- 332 F8.6 arcsec spzO-LSsep ?=- Distance from spec-z to lsdr9
photometric ctp (corrected for pm)
(SPECZORIGLS_SEP)
334 I1 --- spzOLSGT1ctp Can spec-z be associated with >1
possible lsdr9 counterpart?
(SPECZORIGLS_GT1CTP)
336 I1 --- spzOLSctpRank ?=- Rank of ctp out of all
possibilities for this spec-z
(1=closest)
(SPECZORIGLSCTPRANK)
338- 366 A29 --- spzOID1 Orig. value of ID of individual
spec-z measurement (as a string)
(SPECZORIGID_1)
368- 376 F9.6 --- zpzOz ?=- Orig. redshift value of
individual spec-z measurement
(SPECZORIGREDSHIFT)
378- 385 A8 --- q_zpzOz Orig. redshift quality value of
individual spec-z measurement
(SPECZORIGQUAL)
387- 388 I2 --- zpzOnormQ ?=- Orig. redshift quality of
individual spec-z measurement -
normalised (SPECZORIGNORMQ)
390- 404 A15 --- zpzOClass Orig. classification label of
individual spec-z measurement
(SPECZORIGCLASS)
406 I1 --- zpzOHasVi True if individual spec-z has a
visual inspection from our team
(SPECZORIGHASVI)
408- 414 A7 --- zpzONormC Normalised classification code of
individual spec-z measurement
(SPECZORIGNORMC)
416- 430 F15.11 deg RAUdeg ?=- Adopted coordinate of specz
when matching to Salvato et al.
(2022, Cat. J/A+A/661/A3)
counterpart (SPECZRAUSED)
432- 446 F15.11 deg DEUdeg ?=- Adopted coordinate of specz
when matching to Salvato et al.
(2022, Cat. J/A+A/661/A3)
counterpart (SPECZDECUSED)
448- 455 F8.6 arcsec Sepspz-ctp ?=- Dist. from CTPLS8RA,
CTPLS8DEC to SPECZRAspecz,
SPECZDECspecz
(SeparationSPECZCTP)
457 I1 --- has-specz Does this Salvato et al. (2022,
Cat. J/A+A/661/A3) counterpart
have a spec-z? (has_specz)
459 I1 --- good-ctp [0/1] Has good counterpart?
(good_ctp)
461 I1 --- dl10 [0/1] Has LS-DR10 images? (dl10)
463 I1 --- zspSDSS [0/1] Has SDSS zsp? (sdss_specz)
465 I1 --- zspOther [0/1] Has other zsp? (others_specz)
467 I1 --- goodz [0/1] Has good zsp? (goodz)
469- 479 A11 --- NWAYCtpLS8 LS8 Unique OBJECTID of the best LS8
counterpart from NWAY
(CTPNWAYLS8UNIQUEOBJID)
481- 495 F15.11 deg RANdeg Right Ascension (J2000) of the best
LS8 counterpart from NWAY
(CTPNWAYLS8_RA)
497- 511 F15.11 deg DENdeg Declination (J2000) of the best LS8
counterpart from NWAY
(CTPNWAYLS8_DEC)
513- 522 F10.6 --- NWAYdbayfac Logarithm of ratio between prior
and posterior, from separation,
positional error and number
density (see Appx. in Salvato et
al 2018 for clarifications)
(CTPNWAYdist_bayesfactor)
524- 531 F8.6 --- NWAYdistpo Distance posterior probability
comparing this association vs. no
association (see Appx. in Salvato
et al 2018 for clarifications)
(CTPNWAYdist_post)
533- 540 F8.6 --- NWAYpsingle Same as dist_post, but weighted by
the prior (CTPNWAYp_single) (3)
542- 549 F8.6 --- NWAYpany For each entry in the X-ray
catalogue, the probability that
there is a counterpart in LS8
(CTPNWAYp_any) (3)
551- 558 F8.6 --- NWAYpi Relative probability of the
eROSITA/LS8 match
(CTPNWAYp_i) (3)
560- 568 F9.6 arcsec DistNWAYLE Separation between the Xray
position and the best LS8
counterparts from NWAY
(DistNWAYLS8_ERO)
570- 588 I19 --- GaiaEDR3 ?=-99 ID in Gaia EDR3 source
catalog (GaiaEDR3_ID)
590- 599 F10.6 mas plx ?=- Parallax from Gaia EDR3
(GaiaEDR3_parallax)
601- 606 F6.4 mas e_plx ?=- Parallax error from Gaia EDR3
(GaiaEDR3parallaxerror)
608- 619 E12.6 --- RPlx ?=- Parallax/Parallax error.
ratio >5 SECURE GALACTIC
(GaiaEDR3parallaxover_error)
621- 631 F11.6 mas/yr pmRA ?=- Proper motion in RA from Gaia
EDR3 (GaiaEDR3_pmra)
633- 637 F5.3 mas/yr e_pmRA ?=- Error on Proper motion in RA
from Gaia EDR3
(GaiaEDR3pmraerror)
639- 649 F11.6 mas/yr pmDE ?=- Proper motion in Dec from Gaia
EDR3 (GaiaEDR3_pmdec)
651- 655 F5.3 mas/yr e_pmDE ?=- Error on Proper motion in Dec
from Gaia EDR3
(GaiaEDR3pmdecerror)
657- 664 F8.5 mag Gmag ?=- G band magnitude (VEGA) from
Gaia EDR3
(GaiaEDR3photgmeanmag)
666- 673 F8.6 mag e_Gmag ?=- Error G band magnitude from
Gaia EDR3
(GaiaEDR3photgmeanmag_error)
675- 682 F8.5 mag BPmag ?=- BP band magnitude (VEGA) from
Gaia EDR3
(GaiaEDR3photbpmeanmag)
684- 691 F8.6 mag e_BPmag ?=- Error BP band magnitude from
Gaia EDR3
(GaiaEDR3photbpmeanmag_error)
693- 700 F8.5 mag RPmag ?=- RP band magnitude (VEGA) from
Gaia EDR3
(GaiaEDR3photrpmeanmag)
702- 709 F8.6 mag e_RPmag ?=- Error BP band magnitude from
Gaia EDR3
(GaiaEDR3photrpmeanmag_error)
711- 717 F7.4 mag FUV ?=- Galex Far UV magnitude (AB)
(FUV)
719- 724 F6.4 mag e_FUV ?=- Galex Far UV magnitude error
(FUV_ERR)
726- 732 F7.4 mag NUV ?=- Galex Near UV magnitude (AB)
(NUV)
734- 741 F8.6 mag e_NUV ?=- Galex Near UV magnitude error
(NUV_ERR)
743- 749 F7.4 mag uKiDS ?=- KiDS u-band magnitude (AB)
(KiDS_u)
751- 758 F8.6 mag e_uKiDS ?=- KiDS u-band magnitude error
(KiDSuERR)
760- 766 F7.4 mag gKiDS ?=- KiDS g-band magnitude (AB)
(KiDS_g)
768- 775 F8.6 mag e_gKiDS ?=- KiDS g-band magnitude error
(KiDSgERR)
777- 783 F7.4 mag rKiDS ?=- KiDS r-band magnitude (AB)
(KiDS_r)
785- 792 F8.6 mag e_rKiDS ?=- KiDS r-band magnitude error
(KiDSrERR)
794- 800 F7.4 mag iKiDS ?=- KiDS i-band magnitude (AB)
(KiDS_i)
802- 809 F8.6 mag e_iKiDS ?=- KiDS i-band magnitude error
(KiDSiERR)
811 I1 mag omegacz ? OmegaCAM z-band magnitude (AB)
(ALWAYS EMPTY) (omegac_z)
813 I1 mag e_omegacz ? OmegaCAM z-band magnitude error
(ALWAYS EMPTY) (omegaczERR)
815- 821 F7.4 mag gHSC ?=- HSC g-band cmodel magnitude
(AB) (HSC_g)
823- 832 F10.6 mag e_gHSC ?=- HSC g-band cmodel magnitude
error (HSCgERR)
834- 840 F7.4 mag rHSC ?=- HSC r-band cmodel magnitude
(AB) when images are mostly from
r-filter (HSC_r) (4)
842- 849 F8.6 mag e_rHSC ?=- HSC r-band cmodel magnitude
error (HSCrERR)
851- 857 F7.4 mag r2HSC ?=- HSC r2-band cmodel magnitude
(AB) when images are mostly from
r2-filter (HSC_r2) (4)
859- 866 F8.6 mag e_r2HSC ?=- HSC r2-band cmodel magnitude
error (HSCr2ERR)
868- 874 F7.4 mag iHSC ?=- HSC i-band cmodel magnitude
(AB) when images are mostly from
i-filter (HSC_i) (4)
876- 883 F8.6 mag e_iHSC ?=- HSC i-band cmodel magnitude
error (HSCiERR)
885- 891 F7.4 mag i2HSC ?=- HSC i2-band cmodel magnitude
(AB) when images are mostly from
i2-filter (HSC_i2) (4)
893- 900 F8.6 mag e_i2HSC ?=- HSC i2-band cmodel magnitude
error (HSCi2ERR)
902- 908 F7.4 mag zHSC ?=- HSC z-band cmodel magnitude
(AB) (HSC_z)
910- 917 F8.6 mag e_zHSC ?=- HSC z-band cmodel magnitude
error (HSCzERR)
919- 925 F7.4 mag YHSC ?=- HSC Y-band cmodel magnitude
(AB) (HSC_Y)
927- 935 F9.6 mag e_YHSC ?=- HSC Y-band cmodel magnitude
error (HSCYERR)
937- 943 F7.4 mag zVISTA ?=- VISTA/VIKING z-band magnitude
(AB) (VISTA_z)
945- 953 F9.6 mag e_zVISTA ?=- VISTA/VIKING z-band magnitude
error (VISTAzERR)
955- 961 F7.4 mag YVISTA ?=- VISTA/VIKING Y-band magnitude
(AB) (VISTA_Y)
963- 971 F9.6 mag e_YVISTA ?=- VISTA/VIKING Y-band magnitude
error (VISTAYERR)
973- 979 F7.4 mag JVISTA ?=- VISTA/VIKING J-band magnitude
(AB) (VISTA_J)
981- 989 F9.6 mag e_JVISTA ?=- VISTA/VIKING J-band magnitude
error (VISTAJERR)
991- 997 F7.4 mag HVISTA ?=- VISTA/VIKING H-band magnitude
(AB) (VISTA_H)
999-1009 F11.6 mag e_HVISTA ?=- VISTA/VIKING H-band magnitude
error (VISTAHERR)
1011-1017 F7.4 mag KsVISTA ?=- VISTA/VIKING Ks-band magnitude
(AB) (VISTA_Ks)
1019-1027 F9.6 mag e_KsVISTA ?=- VISTA/VIKING Ks-band magnitude
error (VISTAKsERR)
1029-1036 F8.5 mag W1mag ?=- LS8/Wise W1 magnitude (AB) (W1)
1038-1046 F9.6 mag e_W1mag ?=- LS8/Wise W1 magnitude error
(W1_ERR)
1048-1055 F8.5 mag W2mag ?=- LS8/Wise W2 magnitude (AB) (W2)
1057-1066 F10.6 mag e_W2mag ?=- LS8/Wise W2 magnitude error
(W2_ERR)
1068-1075 F8.5 mag W3mag ?=- LS8/Wise W3 magnitude (AB) (W3)
1077-1087 F11.6 mag e_W3mag ?=- LS8/Wise W3 magnitude error
(W3_ERR)
1089-1096 F8.5 mag W4mag ?=- LS8/Wise W4 magnitude (AB) (W4)
1098-1108 F11.6 mag e_W4mag ?=- LS8/Wise W4 magnitude error
(W4_ERR)
1110-1117 F8.5 mag gLS8 ?=- LS8 g-band magnitude (AB)
(LS8_g)
1119-1127 F9.6 mag e_gLS8 ?=- LS8 g-band magnitude error
(LS8gERR)
1129-1136 F8.5 mag rLS8 ?=- LS8 r-band magnitude (AB)
(LS8_r)
1138-1146 F9.6 mag e_rLS8 ?=- LS8 r-band magnitude error
(LS8rERR)
1148-1155 F8.5 mag zLS8 ?=- LS8 z-band magnitude (AB)
(LS8_z)
1157-1165 F9.6 mag e_zLS8 ?=- LS8 z-band magnitude error
(LS8zERR)
1167-1173 F7.4 mag YVHS ?=- VISTA/VHS Y-band magnitude (AB)
(VHS_Y)
1175-1181 F7.4 mag e_YVHS ?=- VISTA/VHS Y-band magnitude
error (VHSYERR)
1183-1189 F7.4 mag HVHS ?=- VISTA/VHS H-band magnitude (AB)
(VHS_H)
1191-1196 F6.4 mag e_HVHS ?=- VISTA/VHS H-band magnitude
error (VHSHERR)
1198-1204 F7.4 mag KsVHS ?=- VISTA/VHS Ks-band magnitude
(AB) (VHS_Ks)
1206-1212 F7.4 mag e_KsVHS ?=- VISTA/VHS Ks-band magnitude
error (VHSKsERR)
1214-1221 F8.6 mag dgHSC ?=- Difference between psf and Kron
magnitude in HSC g-band (AB)
(HSCgdiff)
1223-1230 F8.6 mag drHSC ?=- Difference between psf and Kron
magnitude in HSC r-band (AB)
(HSCrdiff)
1232-1239 F8.6 mag diHSC ?=- Difference between psf and Kron
magnitude in HSC i-band (AB)
(HSCidiff)
1241-1248 F8.6 mag dzHSC ?=- Difference between psf and Kron
magnitude in HSC z-band (AB)
(HSCzdiff)
1250-1252 I3 --- HSCoptExt Extension in HSC griz bands.
1=extended; -99=data missing
0=other from Aihara et al.
(2018PASJ...70S...4A 2018PASJ...70S...4A)
(HSCoptextended)
1254 I1 --- photLS8 [0/1]?=-99 Flag for LS8 photometry:
true when the source has
simultaneously g,r,z,w1 photometry
in LS8 (CTPLS8phot_flag)
1256-1259 A4 --- LS8Type Morphological model from LS8
(CTPLS8TYPE)
1261 I1 --- inKiDS [0/1] Flag for KiDS coverage:
1: Source is in KiDS area;
0: otherwise (inKiDSflag)
1263 I1 --- inHSC [0/1] Flag for HSC coverage:
1: Source is in HSC area as from
Aihara et al.
(2018PASJ...70S...4A 2018PASJ...70S...4A);
0: otherwise (inHSCflag)
1265-1284 A20 --- CTPClass SECURE/LIKELY GALACTIC/
EXTRAGALACTIC, as from flowchart
(see Salvato+2021)
(CTP_Classification)
1286-1293 F8.6 --- zp Photoz from Le PHARE, but set to 0
for GALACTIC sources
(PHZLePHAREzphot)
1295-1300 F6.4 --- b-zp Le PHARE zphot min at 1 sigma
(PHZLePHAREzl68)
1302-1307 F6.4 --- B-zp Le PHARE zphot max at 2 sigma
(PHZLePHAREzu68)
1309-1314 F6.4 --- b2-zp Le PHARE zphot min at 2 sigma
(PHZLePHAREzl90)
1316-1321 F6.4 --- B2-zp Le PHARE zphot max at 3 sigma
(PHZLePHAREzu90)
1323-1328 F6.4 --- b3-zp Le PHARE zphot min at 3 sigma
(PHZLePHAREzl99)
1330-1335 F6.4 --- B3-zp Le PHARE zphot max at 3 sigma
(PHZLePHAREzu99)
1337-1348 E12.6 --- chi2 Le PHARE chi2 value for best
fitting galaxy/AGN template
(PHZLePHAREchi2)
1350-1353 I4 --- modelAGN Le PHARE model number for best
template fitting the data (for
PLIKE 1000+model number)
(PHZLePHAREmodelAGN)
1355 I1 --- Extlaw [0/1]?=- Le PHARE Extinction Law
applied to the template: Prevot
(1) or none (0)
(PHZLePHAREextlaw)
1357-1364 F8.6 --- E(B-V) Le PHARE E(B-V) applied to the
template (PHZLePHAREEBV)
1366-1372 F7.3 --- pzp Le Phare probability distribution.
Photoz more reliable when value is
high (PHZLePHAREpdz)
1374-1375 I2 --- Nband Le Phare number of bands used for
the computation of photoz
(PHZLePHAREnband)
1377-1380 F4.2 --- zpb-2 ?=- Phare second best photoz from
LePhare, if existing
(PHZLePHAREzphot_2)
1382-1393 E12.6 --- chi2-2 Le Phare chi2 value for second best
fitting template, if existing
(PHZLePHAREchi2_2)
1395-1398 I4 --- modelAGN-2 Le Phare second best template
fitting the data, if existing
(PHZLePHAREmodelAGN_2)
1400-1408 F9.6 --- pzp-2 Le Phare probability distribution
for secondary solution, if
existing (PHZLePHAREpdz_2)
1410-1417 F8.6 --- DNNzp ?=- Photoz from DNNZ (from
Nishizawa et al.,), but set to 0
for GALACTIC sources
(PHZDNNZzphot)
1419-1427 F9.6 --- bDNNzp ?=- DNNz zphot min at 1 sigma
(PHZDNNzzl68)
1429-1436 F8.6 --- BDNNzp ?=- DNNz zphot max at 1 sigma
(PHZDNNzzu68)
1438-1446 F9.6 --- b_DNNzp ?=- DNNz zphot min at 2 sigma
(PHZDNNzzl95)
1448-1455 F8.6 --- B_DNNzp ?=- DNNz zphot max at 2 sigma
(PHZDNNzzu95)
1457-1465 F9.6 --- zF Final redshift: zspec when
available, else photo-z from
Le PHARE; 0 for GALACTIC sources
(CTP_REDSHIFT)
1467 I1 --- zgrade [2/5] In a range from 5
(spectroscopy) to 0 (unreliable
photo-z) (CTPREDSHIFTGRADE)
1469 I1 --- CTPClassN [0/3] Same as CTP_classification,
but with numbers: 3: SECURE
EXTRAGALACTIC; 2: LIKELY
EXTRAGALACTIC; 1: SECURE GALACTIC;
0: LIKELY GALACTIC (CTP_CLASS)
1471 I1 --- ClClass [1/5] Range from 5 (most likely a
cluster) to 1 (not a cluster)
(see Salvato+2021) (CLUSTER_CLASS)
1473-1481 F9.5 deg RAPdeg ?=- SDSS plug position coordinate:
right ascension (PLUG_RA)
1483-1491 F9.5 deg DEPdeg ?=- SDSS plug position coordinate:
declination (PLUG_DEC)
1493-1497 I5 --- Plate ?=- SDSS plate used in the
observation (PLATE)
1499-1503 I5 d MJD ?=- SDSS modified Julian date of
observation (MJD)
1505-1509 I5 --- FiberId ?=- SDSS fiber identification
(FIBERID)
1511 I1 --- Field [0]? SDSS field sequence number
(FIELD)
1513-1522 I10 --- CatalogId ?=- SDSS catalog ID (CATALOGID)
1524-1530 A7 --- Run2D SDSS tagged version of idlspec2d
that was used to reduce the
SDSS BOSS spectra (RUN2D)
1532-1535 A4 --- DR SDSS data release (DR)
1537-1548 E12.6 arcsec SepLS8-SDSS ?=- Distance between matched
objects along a great circle
(SepLS8SDSS)
1550 I1 --- Nspec [1/5]? SDSS number of spectra
(NSPEC)
1552-1555 A4 --- Sample eROSITA sample (SAMPLE)
1557-1568 E12.6 --- SNMedianAll ?=- SDSS median Signal to Noise
over the entire spectral range
(SNMEDIANALL)
1570-1580 F11.8 --- z ?=- SDSS best redshift fit (Z)
1582-1592 F11.8 --- e_z []?=- SDSS redshift error (Z_ERR)
1594-1605 E12.6 --- zWarning ?=- SDSS redshift measurement
warning flag (ZWARNING)
1607-1611 I5 --- ID-SRCL ?=- ID of the sources in the eFEDS
main X-ray catalog (Paper I)
(ID_SRC) (5)
1613-1621 F9.6 --- zL ?=- The redshift adopted for the
spectral model (Redshift) (5)
1623 I1 --- NewClass [2/3]? Updatd classification of
the optical counterpart
(New_Class) (5)
1625 I1 --- Newquality [2/4]? Updated counterpart quality
(New_quality) (5)
1627-1641 F15.11 deg RACdeg ?=- Right ascension (J2000),
astrometric corrected (Paper I)
(RA_CORR) (5)
1643-1657 F15.11 deg DECdeg ?=- Declination (J2000),
astrometric corrected (Paper I)
(DEC_CORR) (5)
1659-1670 E12.6 --- DetLikeL ?=- 0.2-2.3 keV source detection
likelihood (Paper I)
(DET_LIKE) (5)
1672 I1 --- inArea90 [0/1] Whether located inside the
inner 90%-area region of eFEDS
(Paper I) (inArea90) (5)
1674 I1 --- EDRQual [0/4]? Counterpart quality
(Paper II). A value ≥2 is
recommended. (EDR_QUALITY) (6)
1676 I1 --- EDRClass [0/3]? Classification of the
optical counterpart (Paper II).
0:likely Galactic;1:secure Galac.;
2:likely extraGalactic;
3:secure extraGalac.
(EDR_CLASS) (6)
1678-1685 F8.6 --- EDRz ?=- Redshift of the optical
counterpart (Paper II)
(EDR_REDSHIFT) (6)
1687 I1 --- LxModel [1/5]? Index of selected model for
luminosity measurement.
1:single-powerlaw; 3:powerlaw+bb;
4:powerlaw with Gamma
(LxModel) (6)
1689 I1 --- NHClass [1/4]? Class of AGN NH measurement
with model 1 (single-powerlaw).
1: uninformative; 2: unobscured;
3: mildly-measured;
4: well-measured (NHclass) (6)
1691 I1 --- FSModel [3/6]? Index of selected model for
0.5-2keV flux.
5: counts-based measurement for
faint sources; 3,6,or 0: robust
spectra-based measurement
(FSModel) (6)
1693 I1 --- FHModel [5/7]? Index of selected model for
2.3-5keV flux. 5: counts-based
measurement for faint sources;
7: robust spectra-based
measurement (FHModel) (6)
1695-1706 E12.6 cm^-2 galNH ?=- Total column density of
Galactic absorption (galNH) (6)
1708-1719 E12.6 cm^-2 galNHI ?=- HI column density from HI4PI
(galNHI) (6)
1721-1732 E12.6 ct SrcCts ?=- Source net counts in the
0.2-5 keV band (SrcCts) (6)
1734-1745 E12.6 mW/m2 FluxcMedS ?=- Absorption corrected flux in
observed 0.5-2 keV, posterior
median (FluxCorrMeds) (6)
1747-1758 E12.6 mW/m2 b_FluxcS ?=- Absorption corrected flux in
observed 0.5-2 keV, 1sigma lower
limit (FluxCorrLo1s) (6)
1760-1771 E12.6 mW/m2 B_FluxcS ?=- Absorption corrected flux in
observed 0.5-2 keV, 1sigma upper
limit (FluxCorrUp1s) (6)
1773-1784 E12.6 mW/m2 FluxcMedT ?=- Absorption corrected flux in
observed 2.3-5 keV, posterior
median (FluxCorrMedt) (6)
1786-1797 E12.6 mW/m2 b_FluxcT ?=- Absorption corrected flux in
observed 2.3-5 keV, 1sigma lower
limit (FluxCorrLo1t) (6)
1799-1810 E12.6 mW/m2 B_FluxcT ?=- Absorption corrected flux in
observed 2.3-5 keV, 1sigma upper
limit (FluxCorrUp1t) (6)
1812-1823 E12.6 mW/m2 FluxIMedS ?=- From Liu et al. (2022),
Absorption corrected flux in
rest-frame 0.5-2 keV, posterior
median (FluxIntrMeds) (6)
1825-1836 E12.6 mW/m2 b_FluxIS ?=- Absorption corrected flux in
rest-frame 0.5-2keV, 1sigma lower
limit (FluxIntrLo1s) (6)
1838-1849 E12.6 mW/m2 B_FluxIS ?=- Absorption corrected flux in
rest-frame 0.5-2keV, 1sigma upper
limit (FluxIntrUp1s) (6)
1851-1862 E12.6 mW/m2/eV FluxIMed2keV ?=- Absorption corrected flux at
rest-frame 2keV, median
(FluxIntrMed2keV) (6)
1864-1875 E12.6 mW/m2/eV b_FluxI2keV ?=- Absorption corrected flux at
rest-frame 2keV, 1sigma lower
limit (FluxIntrLo12keV) (6)
1877-1888 E12.6 mW/m2/eV B_FluxI2keV ?=- Absorption corrected flux at
rest-frame 2keV, 1sigma upper
limit (FluxIntrUp12keV) (6)
1890-1897 F8.4 10-7W LumIMedS ?=- Intrinsic luminosity in
rest-frame 0.5-2 keV, posterior
median (LumiIntrMeds) (6)
1899-1906 F8.4 10-7W b_LumIS ?=- Intrinsic luminosity in
rest-frame 0.5-2 keV, 1sigma lower
limit (LumiIntrLo1s) (6)
1908-1915 F8.4 10-7W B_LumIS ?=- Intrinsic luminosity in
rest-frame 0.5-2 keV, 1sigma upper
limit (LumiIntrUp1s) (6)
1917-1924 F8.4 10-7W/eV LumIMed2keV ?=- Intrinsic luminosity at
rest-frame 2keV, posterior median
(LumiIntrMed2keV) (6)
1926-1933 F8.4 10-7W/eV b_LumI2keV ?=- Intrinsic luminosity at
rest-frame 2keV, 1sigma lower
limit (LumiIntrLo12keV)
1935-1942 F8.4 10-7W/eV B_LumI2keV ?=- Intrinsic luminosity at
rest-frame 2keV, 1sigma upper
limit (LumiIntrUp12keV) (6)
1944-1955 E12.6 mW/m2 FluxObsMedS ?=- Observed flux in observed
0.5-2 keV, posterior median
(FluxObsvMeds) (6)
1957-1968 E12.6 mW/m2 b_FluxObsS ?=- Observed flux in observed
0.5-2 keV, 1sigma lower limit
(FluxObsvLo1s) (6)
1970-1981 E12.6 mW/m2 B_FluxObsS ?=- Observed flux in observed
0.5-2 keV, 1sigma upper limit
(FluxObsvUp1s) (6)
1983-1994 E12.6 mW/m2 FluxObsMedT ?=- Observed flux in observed
2.3-5 keV, posterior median
(FluxObsvMedt) (6)
1996-2007 E12.6 mW/m2 b_FluxObsT ?=- Observed flux in observed
2.3-5 keV, 1sigma lower limit
(FluxObsvLo1t) (6)
2009-2020 E12.6 mW/m2 B_FluxObsT ?=- Observed flux in observed
2.3-5 keV, 1sigma upper limit
(FluxObsvUp1t)
2022-2029 F8.6 --- lognHKLm1 ?=- log AGN column density,
KL divergence (in nats units)
(lognHKLm1) (6)
2031-2037 F7.4 [cm-2] b_lognHm1 ?=- log AGN column density,
HDI lower limit (lognHHLom1) (6)
2039-2045 F7.4 [cm-2] B_lognHm1 ?=- log AGN column density,
HDI upper limit (lognHHUpm1) (6)
2047-2053 F7.4 [cm-2] lognHMedm1 ?=- log AGN column density,
posterior median
(lognHMedm1) (6)
2055-2062 F8.6 --- GammaKLm3 ?=- Primary power-law slope in
model 3, KL divergence
(in nats units) (GammaKLm3) (6)
2064-2071 F8.6 --- b_GammaHm3 ?=- Primary power-law slope in
model 3, HDI lower limit
(GammaHLom3) (6)
2073-2079 F7.5 --- B_GammaHm3 ?=- Primary power-law slope in
model 3, HDI upper limit
(GammaHUpm3) (6)
2081-2088 F8.6 --- GammaMedm3 ?=- Primary power-law slope in
model 3, posterior median
(GammaMedm3) (6)
2090-2098 F9.4 [-] logZm0 ?=- log Bayesian evidence with
model 0: APEC (logZ_m0) (6)
2100-2108 F9.4 [-] logZm1 ?=- log Bayesian evidence with
model 1: single powerlaw
(logZ_m1) (6)
2110-2118 F9.4 [-] logZm2 ?=- log Bayesian evidence with
model 2: double powerlaw
(logZ_m2) (6)
2120-2128 F9.4 [-] logZm3 ?=- log Bayesian evidence with
model 3: powerlaw + blackbody
(logZ_m3) (6)
2130-2138 F9.4 [-] logZm4 ?=- log Bayesian evidence with
model 4: powerlaw with Gamma fixed
at 2.0 (logZ_m4) (6)
2140-2148 F9.4 [-] logZm5 ?=- log Bayesian evidence with
model 5: shape-fixed powerlaw
(logZ_m5) (6)
--------------------------------------------------------------------------------
Note (1): From Brunner et al. (2022, J/A+A/661/A1).
Note (2): From Salvato et al. (2022, Cat. J/A+A/661/A3).
Note (3): See Appx. in Salvato et al. 2018MNRAS.473.4937S 2018MNRAS.473.4937S.
Note (4): See Salvato et al. (2022, Cat. J/A+A/661/A3.)
Note (5): From Liu et al. (2022, Cat. J/A+A/661/A2)
Note (6): From Liu et al. (2022, Cat. J/A+A/661/A5)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: spectra.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 I8 --- LS-IDX ?=-1 Index for internal use only
(LS_IDX)
10- 25 I16 --- LS-ID ?=0 Unique ID of Legacy Survey DR9
photometric object associated with the
spec-z. Computed from Legacy Survey DR9
catalogue as ls_id = objid +
(brickid≪16)+(release≪40) (LS_ID)
27- 41 F15.11 deg RALdeg ?=- Coordinate from Legacy Survey DR9
(J2000) at epoch LSepoch (LS_RA)
43- 57 F15.11 deg DELdeg ?=- Coordinate from Legacy Survey DR9
(J2000) at epoch LSepoch (LS_DEC)
59- 69 F11.6 mas/yr pmRA ?=- Proper motion from Legacy Survey DR9
(LS_PMRA)
71- 82 F12.6 mas/yr pmDE ?=- Proper motion from Legacy Survey DR9
(LS_PMDEC)
84- 90 F7.2 yr LSepoch ?=- Coordinate epoch from Legacy Survey
DR9 (LS_EPOCH)
92- 99 F8.5 mag gmag ?=- DECam g-band model magnitude derived
from Legacy Survey DR9, AB (LSMAGG)
101-108 F8.5 mag rmag ?=- DECam r-band model magnitude derived
from Legacy Survey DR9, AB (LSMAGR)
110-117 F8.5 mag zmag ?=- DECam z-band model magnitude derived
from Legacy Survey DR9, AB (LSMAGZ)
119-120 I2 --- Nzsp ?=0 Total number of spec-z associated
with this Legacy Survey DR9 object
(SPECZ_N)
122-136 F15.11 deg RAzdeg Coordinate of spec-z, propagated if
necessary to epoch J2000
(SPECZ_RAJ2000)
138-152 F15.11 deg DEzdeg Coordinate of spec-z, propagated if
necessary to epoch J2000
(SPECZ_DEJ2000)
154 I1 --- Nzspsel Number of spec-z selected to inform
result for this object (SPECZ_NSEL)
156 I1 --- zspRank [1/3] Rank of this particular spec-z
(1=best, >1=less favoured,
0=not selected) (SPECZ_RANK)
158-166 F9.6 --- zsp ?=- Final redshift determined for this
object (SPECZ_REDSHIFT)
168-169 I2 --- spzNormQ Final normalised redshift quality
(NORMQ) associated with this object
(see section 3) (SPECZ_NORMQ)
171-177 A7 --- spzNormC Final normalised classification
determined for this object
(SPECZ_NORMC)
179 I1 --- spzHasVi [0/1] True if best spec-z for this
object has a visual inspection
(SPECZ_HASVI)
181-189 A9 --- spzCatCode Catalogue code of best spec-z for this
object (see table 1) (SPECZ_CATCODE)
191-196 I6 --- spzBitMask Bitmask encoding catalogues containing
spec-z for this object. Bit encoding:
0=sdssv_vi; 1=boss_vi; 2=sdss_vi; ...
(SPECZ_BITMASK)
198-203 I6 --- spzSelBitMask Bitmask encoding catalogues containing
informative spec-z for an object.
Bit encoding is the same as
specz_bitmask (SPECZSELBITMASK)
205 I1 --- spzFlags [0/1] Bitmask encoding quality flags for
this object. Bit encoding: 0=No Legacy
Survey DR9 counterpart ...
4=Disagreement between classifications
(SPECZ_FLAGS)
207-208 I2 --- spzSelNormQMax Highest NORMQ of informative spec-z for
this object (SPECZSELNORMQ_MAX)
210-218 F9.6 --- spzSelNormQMean ?=- Mean NORMQ of informative spec-z for
this object (SPECZSELNORMQ_MEAN)
220-228 F9.6 --- spzSelzmean ?=- Mean redshift of informative spec-z
for this object (SPECZSELZ_MEAN)
230-238 F9.6 --- spzSelzmed ?=- Median redshift of informative
spec-z for this object
(SPECZSELZ_MEDIAN)
240-247 F8.6 --- spzSelzstddev ?=- Standard deviation of redshifts for
informative spec-z for object
(SPECZSELZ_STDDEV)
249 I1 --- zspAllNVI Number of spec-z with VIs for this
object (SPECZALLNVI)
251 I1 --- zspAllNormQMax Highest NORMQ of all spec-z for this
object (SPECZALLNORMQMAX)
253-260 F8.6 --- zspAllNormQMean ?=- Mean NORMQ of all spec-z for this
object (SPECZALLNORMQMEAN)
262-270 F9.6 --- zspAllMean ?=- Mean redshift of all spec-z for this
object (SPECZALLZ_MEAN)
272-280 F9.6 --- zspAllMedian ?=- Median redshift of all spec-z for
this object (SPECZALLZ_MEDIAN)
282-289 F8.6 --- zspAllStdDev ?=- Standard deviation of redshifts for
all spec-z for this object
(SPECZALLZ_STDDEV)
291-299 A9 --- OCatCode Catalogue code of individual spec-z
(ORIG_CATCODE)
301-315 F15.11 deg RAOdeg Coordinate associated with individual
spec-z measurement (ORIG_RA)
317-331 F15.11 deg DEOdeg Coordinate associated with individual
spec-z measurement (ORIG_DEC)
333-338 F6.1 --- EpochO Coordinate epoch associated with
individual spec-z measurement
(ORIGPOSEPOCH)
340-348 F9.6 arcsec spzO-LSsep Distance from spec-z to Legacy Survey
DR9 photometric counterpart (corrected
for proper motion) (ORIGLSSEP)
350 I1 --- spzOLSGT1ctp [0/1] Can spec-z be associated with >1
possible Legacy Survey DR9 counterpart?
(ORIGLSGT1CTP)
352 I1 --- spzOLSctpRank Rank of counterpart out of all
possibilities for this spec-z
(1=closest) (ORIGLSCTP_RANK)
354-365 A12 --- OIDCol Name of column in original catalogue
supplying ORIG_ID value (ORIGIDCOL)
367-382 A16 --- OQualCol Name of column in original catalogue
supplying ORIG_QUAL value
(ORIGQUALCOL)
384-395 A12 --- OZCol Name of column in original catalogue
supplying ORIG_REDSHIFT value
(ORIGREDSHIFTCOL)
397-411 A15 --- OClassCol Name of column in original catalogue
supplying ORIG_CLASS value
(ORIGCLASSCOL)
413-444 A32 --- OID Orig. value of ID of individual spec-z
measurement (as a string) (ORIG_ID)
446-454 F9.6 --- Oz ?=- Orig. redshift value of individual
spec-z measurement (ORIG_REDSHIFT)
456-463 A8 --- OQual Orig. redshift quality value of
individual spec-z measurement
(ORIG_QUAL)
465-466 I2 --- ONormQ Normalised redshift quality of
individual spec-z measurement
(ORIG_NORMQ)
468-482 A15 --- OClass Orig. classification label of individual
spec-z measurement (ORIG_CLASS)
484 I1 --- OHasVi [0/1] True if individual spec-z has a
visual inspection from our team
(ORIG_HASVI)
486-492 A7 --- ONormC Normalised classification code of
individual spec-z measurement
(ORIG_NORMC)
494-498 I5 --- OBitMask Bitmask encoding catalogue providing
spec-z for this spec-z measurement.
See specz_bitmask column (ORIG_BITMASK)
--------------------------------------------------------------------------------
Acknowledgements:
Catarina Aydar, caydar(at)mpe.mpg.de>
Tom Dwelly, dwelly(at)mpe.mpg.de>
(End) Catarina Aydar [MPE, Germany], Patricia Vannier [CDS] 23-Apr-2025