J/A+A/706/A144 eRASS Hard X-ray selected AGNs (Waddell+, 2026)
The SRG/eROSITA all-sky survey: Hard X-ray selected active galactic nuclei.
Waddell S.G.H., Buchner J., Nandra K., Salvato M., Merloni A., Gauger I.,
Boller T., Seppi R., Wolf J., Liu T., Brusa M., Comparat J., Dwelly T.,
Igo Z., Musiimenta B.
<Astron. Astrophys. 706, A144 (2026)>
=2026A&A...706A.144W 2026A&A...706A.144W (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; X-ray sources
Keywords: galaxies: active - quasars: general - galaxies: Seyfert
Abstract:
The eROSITA instrument on board the Spectrum Roentgen Gamma (SRG)
satellite performed its first all-sky survey between December 2019 and
June 2020. This paper presents the resulting hard X-ray (2.3-5keV)
sample, the first created from an all-sky imaging survey in this
energy range, for sources within the western galactic sky
(eROSITA_DE).
We produced a large uniform sample of hard-X-ray selected active
galactic nuclei (AGN), and characterised them with supporting
multi-wavelength astrometry, photometry, and spectroscopy. For the
2863 sources within the sky coverage of the DESI imaging Legacy Survey
Data Release 10 (LS10; >15000deg2), counterparts were identified and
classified. We also performed comparisons with the Swift/BAT sample
and HEAO-1 AGN sample to attempt to better understand the
effectiveness and sensitivity of eROSITA in the hard band.
The 5466 hard X-ray selected sources detected with eROSITA are
presented and discussed here. The Bayesian statistics-based code NWAY
was used to identify the counterparts for the X-ray sources. These
sources were classified based on their multi-wavelength properties,
and the literature was searched to identify spectroscopic redshifts,
which further inform the source classification. A total of 2547
sources were found to have good-quality counterparts, and 111 of these
have been detected only in the hard band. The median redshift of the
extragalactic sources is ∼0.19.
Compared with other hard X-ray selected surveys, the eROSITA hard
sample covers a larger redshift range and probes dimmer sources,
providing a complementary and expanded sample as compared to Swift
BAT. Examining the column density distribution of missed and detected
eROSITA sources present in the follow-up catalogue of Swift BAT 70
month sources, it is demonstrated that eROSITA can detect obscured
sources with column densities >1023cm-2^ corresponding to ∼14% of the
full sample, but that the completeness drops rapidly thereafter. A
sample of hard-only sources, many of which are likely to be obscured
AGN with column densities ∼1023cm-2^, is also presented and
discussed. We caution that a large number of hard-only sources are
believed to be spurious, based on simulations, and that additional
cuts on counterpart quality or requiring spectroscopic redshifts
should be applied to use this sample. X-ray spectral fitting reveals
that these sources have extremely faint soft X-ray emission and their
optical images suggest that they are found in more edge-on galaxies
with lower b/a.
The first eROSITA all-sky survey provided the first imaging survey
above 2keV, and the resulting X-ray catalogue has been demonstrated
to be a powerful tool for understanding AGN, in particular the heavily
obscured AGN found in the hard-only sample.
Description:
The hard X-ray (2.3-5keV) sample of the first eROSITA all-sky survey
(eRASS1), within the western galactic sky (eROSITA_DE). Catalogue of
counterparts are presented, which were obtained by matching with NWAY
within the LS10 (Dey et al. 2019) area and a positional match for the
X-ray sources outside of the LS10 area.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
wls10.dat 1763 2850 eRASS1 hard sample counterparts within LS10
outls10.dat 1335 1710 eRASS1 hard sample counterparts outside LS10
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See also:
J/A+A/682/A34 : SRG/eROSITA all-sky survey catalogs (eRASS1) (Merloni+, 2024)
https://www.legacysurvey.org/dr10 : DESI LS10 Home Page
Byte-by-byte Description of file: wls10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- IAUName String containing the official IAU name
of the source (IAUNAME)
25- 56 A32 --- DetUId String unique detection ID (DETUID)
58- 63 I6 --- SkyTile Sky tile ID (SKYTILE)
65- 68 I4 --- IdSrc Source ID in each sky tile (ID_SRC) (1)
70- 81 I12 --- UId Unique detection ID (UID) (2)
83- 95 I13 --- UId1B 1B catalog UID of the source with a
strong association, or -UID if the
association is weak (UID_1B)
97- 100 I4 --- IdCluster Group ID of simultaneously fitted
sources (ID_CLUSTER)
102- 116 F15.11 deg RAdeg Right ascension (ICRS), corrected (RA)
118- 132 F15.11 deg DEdeg Declination (ICRS), corrected (DEC)
134- 148 F15.11 deg RARdeg Right ascension (ICRS),
uncorrected (RA_RAW)
150- 164 F15.11 deg DERdeg Declination (ICRS),
uncorrected (DEC_RAW)
166- 174 F9.6 deg e_RAdeg ?=- 1-sigma lower error on RA
(RA_LOWERR)
176- 184 F9.6 deg E_RAdeg ?=- 1-sigma upper error on RA
(RA_UPERR)
186- 194 F9.6 deg e_DEdeg ?=- 1-sigma lower error on DEC
(DEC_LOWERR)
196- 204 F9.6 deg E_DEdeg ?=- 1-sigma upper error on DEC
(DEC_UPERR)
206- 214 F9.6 --- posErr 1-sigma positional uncertainty
(POS_ERR)
216- 224 F9.6 --- RADEErr Combined positional error, raw output
from PSF fitting (RADEC_ERR)
226- 240 F15.11 deg GLON Galactic longitude (LII)
242- 256 F15.11 deg GLAT Galactic latitude (BII)
258- 272 F15.11 deg ELON Ecliptic longitude (ELON)
274- 288 F15.11 deg ELAT Ecliptic latitude (ELAT)
290- 296 F7.1 d MJD Modified Julian Date of the observation
of the source nearest to the optical
axis of the telescope (MJD)
298- 304 F7.1 d b_MJD Modified Julian Date of the first
observation of the source (MJD_MIN)
306- 312 F7.1 d B_MJD Modified Julian Date of the last
observation of the source (MJD_MAX)
314- 321 F8.6 arcsec Ext Source Extent Parameter (EXT)
323- 330 F8.6 arcsec s_Ext 1-sigma error on EXT (EXT_ERR)
332- 339 F8.6 arcsec e_Ext 1-sigma lower error on EXT (EXT_LOWERR)
341- 348 F8.6 arcsec E_Ext 1-sigma upper error on EXT (EXT_UPERR)
350- 357 F8.6 --- ExtLike Extent likelihood (EXT_LIKE)
359- 370 E12.6 ct Mlcts0 Source net counts in 0.2-5.0 keV band
(MLCTS0)
372- 385 F14.7 ct s_Mlcts0 1-sigma combined counts error in
0.2-5.0 keV band (MLCTSERR_0)
387- 396 F10.6 ct/s MLRate0 Source count rate in 0.2-5.0 keV band
(MLRATE0)
398- 406 F9.6 ct/s s_MLRate0 1-sigma combined count rate error
in 0.2-5.0 keV band (MLRATEERR_0)
408- 419 E12.6 mW/m2 MLFlux0 Source flux in 2.3-5.0 keV band
(MLFLUX0)
421- 432 E12.6 mW/m2 e_MLFlux0 1-sigma combined error on flux
in 0.2-5.0 keV band (MLFLUXERR_0)
434- 445 E12.6 --- DetLike0 Detection likelihood in 0.2-5.0 keV
band (DETLIKE0)
447- 458 E12.6 arcmin-2 MLBkg0 Background at the source position in
the 0.2-5.0 keV band (MLBKG0)
460- 473 F14.8 ct Mlcts1 Source net counts in 0.2-0.6 keV band
(MLCTS1)
475- 484 F10.6 ct s_Mlcts1 ?=- 1-sigma combined counts error
in 0.2-0.6 keV band (MLCTSERR_1)
486- 499 F14.9 ct e_Mlcts1 ?=- 1-sigma lower counts error
in 0.2-0.6 keV band (MLCTSLOWERR_1)
501- 514 F14.9 ct E_Mlcts1 ?=- 1-sigma upper counts error
in 0.2-0.6 keV band (MLCTSUPERR_1)
516- 524 F9.6 ct/s MLRate1 Source count rate in 0.2-0.6 keV band
(MLRATE1)
526- 533 F8.6 ct/s s_MLRate1 ?=- 1-sigma combined count rate error
in 0.2-0.6 keV band (MLRATEERR_1)
535- 542 F8.6 ct/s e_MLRate1 ?=- 1-sigma lower count rate error
in 0.2-0.6 keV band (MLRATELOWERR_1)
544- 551 F8.6 ct/s E_MLRate1 ?=- 1-sigma upper count rate error
in 0.2-0.6 keV band (MLRATEUPERR_1)
553- 564 E12.6 mW/m2 MLFlux1 Source flux in 0.2-0.6 keV band
(MLFLUX1)
566- 577 E12.6 mW/m2 s_MLFlux1 ?=- 1-sigma combined error on flux
in 0.2-0.6 keV band (MLFLUXERR_1)
579- 590 E12.6 mW/m2 e_MLFlux1 ?=- 1-sigma lower error on flux
in 0.2-0.6 keV band (MLFLUXLOWERR_1)
592- 603 E12.6 mW/m2 E_MLFlux1 ?=- 1-sigma upper error on flux
in 0.2-0.6 keV band (MLFLUXUPERR_1)
605- 616 E12.6 --- DetLike1 ?=- Detection likelihood in 0.2-0.6 keV
band (DETLIKE1)
618- 629 E12.6 arcmin-2 MLBkg1 Background at the source position in
the 0.2-0.6 keV band (MLBKG1)
631- 642 F12.6 s MLExp1 Vignetted exposure time at the source
position in 0.2-0.6 keV band
(MLEXP1)
644- 651 F8.6 --- MLeef1 Enclosed energy fraction in 0.2-0.6 keV
band (MLEEF1)
653- 657 I5 ct Apcts1 Total counts extracted within the
aperture in 0.2-0.6 keV band
(APECTS1)
659- 669 F11.6 ct ApBkg1 Background counts extracted within the
aperture in 0.2-0.6 keV band,
excluding nearby sources using the
source map (APEBKG1)
671- 682 F12.6 s ApExp1 Exposure map value in 0.2-0.6 keV band
at the given position (APEEXP1)
684- 690 F7.5 pix ApRad1 Extraction radius in pixels (4'') in
the 0.2-0.6 keV band (APERADIUS1)
692- 699 F8.6 --- ApPois1 ?=- Poisson probability that the
extracted counts (APECTS1) are a
background fluctuation (APEPOIS1)
701- 713 F13.7 ct Mlcts2 Source net counts in 0.6-2.3 keV band
(MLCTS2)
715- 727 F13.7 ct s_Mlcts2 ?=- 1-sigma combined counts error
in 0.6-2.3 keV band (MLCTSERR_2)
729- 738 F10.6 ct e_Mlcts2 ?=- 1-sigma lower counts error
in 0.6-2.3 keV band (MLCTSLOWERR_2)
740- 752 F13.7 ct E_Mlcts2 ?=- 1-sigma upper counts error
in 0.6-2.3 keV band (MLCTSUPERR_2)
754- 763 F10.6 ct/s MLRate2 Source count rate in 0.6-2.3 keV band
(MLRATE2)
765- 773 F9.6 ct/s s_MLRate2 ?=- 1-sigma combined count rate error
in 0.6-2.3 keV band (MLRATEERR_2)
775- 782 F8.6 ct/s e_MLRate2 ?=- 1-sigma lower count rate error
in 0.6-2.3 keV band (MLRATELOWERR_2)
784- 792 F9.6 ct/s E_MLRate2 ?=- 1-sigma upper count rate error
in 0.6-2.3 keV band (MLRATEUPERR_2)
794- 805 E12.6 mW/m2 MLFlux2 Source flux in 0.6-2.3 keV band
(MLFLUX2)
807- 818 E12.6 mW/m2 s_MLFlux2 ?=- 1-sigma combined error on flux
in 0.6-2.3 keV band (MLFLUXERR_2)
820- 831 E12.6 mW/m2 e_MLFlux2 ?=- 1-sigma lower error on flux
in 0.6-2.3 keV band (MLFLUXLOWERR_2)
833- 844 E12.6 mW/m2 E_MLFlux2 ?=- 1-sigma upper error on flux
in 0.6-2.3 keV band (MLFLUXUPERR_2)
846- 857 E12.6 --- DetLike2 Detection likelihood in 0.6-2.3 keV
band (DETLIKE2)
859- 870 E12.6 arcmin-2 MLBkg2 Background at the source position in
the 0.6-2.3 keV band (MLBKG2)
872- 885 F14.8 s MLExp2 Vignetted exposure time at the source
position in 0.6-2.3 keV band
(MLEXP2)
887- 894 F8.6 --- MLeef2 Enclosed energy fraction in 0.6-2.3 keV
band (MLEEF2)
896- 900 I5 ct Apcts2 Total counts extracted within the
aperture in 0.6-2.3 keV band
(APECTS2)
902- 913 E12.6 ct ApBkg2 Background counts extracted within the
aperture in 0.6-2.3 keV band,
excluding nearby sources using the
source map (APEBKG2)
915- 926 E12.6 s ApExp2 Exposure map value in 0.6-2.3 keV band
at the given position (APEEXP2)
928- 934 F7.5 pix ApRad2 Extraction radius in pixels (4'') in
the 0.6-2.3 keV band (APERADIUS2)
936- 943 F8.6 --- ApPois2 ?=- Poisson probability that the
extracted counts (APECTS2) are a
background fluctuation (APEPOIS2)
945- 956 F12.7 ct Mlcts3 Source net counts in 2.3-5.0 keV band
(MLCTS3)
958- 966 F9.5 ct s_Mlcts3 ?=- 1-sigma combined counts error in
2.3-5.0 keV band (MLCTSERR_3)
968- 975 F8.5 ct e_Mlcts3 ?=- 1-sigma lower counts error in
2.3-5.0 keV band (MLCTSLOWERR_3)
977- 986 F10.5 ct E_Mlcts3 ?=- 1-sigma upper counts error in
2.3-5.0 keV band (MLCTSUPERR_3)
988- 996 F9.6 ct/s MLRate3 Source count rate in 2.3-5.0 keV band
(MLRATE3)
998-1005 F8.6 ct/s s_MLRate3 ?=- 1-sigma combined count rate error
in 2.3-5.0 keV band (MLRATEERR_3)
1007-1014 F8.6 ct/s e_MLRate3 ?=- 1-sigma lower count rate error
in 2.3-5.0 keV band (MLRATELOWERR_3)
1016-1023 F8.6 ct/s E_MLRate3 ?=- 1-sigma upper count rate error
in 2.3-5.0 keV band (MLRATEUPERR_3)
1025-1036 E12.6 mW/m2 MLFlux3 Source flux in 2.3-5.0 keV band
(MLFLUX3)
1038-1049 E12.6 mW/m2 s_MLFlux3 ?=- 1-sigma combined error on flux
in 2.3-5.0 keV band (MLFLUXERR_3)
1051-1062 E12.6 mW/m2 e_MLFlux3 ?=- 1-sigma lower error on flux
in 2.3-5.0 keV band (MLFLUXLOWERR_3)
1064-1075 E12.6 mW/m2 E_MLFlux3 ?=- 1-sigma upper error on flux
in 2.3-5.0 keV band (MLFLUXUPERR_3)
1077-1088 E12.6 --- DetLike3 Detection likelihood in 2.3-5.0 keV
band (DETLIKE3)
1090-1101 E12.6 arcmin-2 MLBkg3 Background at the source position
in the 2.3-5.0 keV band (MLBKG3)
1103-1114 E12.6 s MLExp3 Vignetted exposure time at the source
position in 2.3-5.0 keV band
(MLEXP3)
1116-1123 F8.6 --- MLeef3 Enclosed energy fraction in 2.3-5.0 keV
band (MLEEF3)
1125-1128 I4 ct Apcts3 Total counts extracted within the
aperture in 2.3-5.0 keV band
(APECTS3)
1130-1141 F12.6 ct ApBkg3 Background counts extracted within the
aperture in 2.3-5.0 keV band,
excluding nearby sources using the
source map (APEBKG3)
1143-1154 F12.6 s ApExp3 Exposure map value in 2.3-5.0 keV band
at the given position (APEEXP3)
1156-1163 F8.5 pix ApRad3 Extraction radius in pixels (4'') in
the 2.3-5.0 keV band (APERADIUS3)
1165-1172 F8.6 --- ApPois3 ?=- Poisson probability that the
extracted counts (APECTS3) are a
background fluctuation (APEPOIS3)
1174 I1 --- FSPSNR Source may lie within an overdense
region near a supernova remnant
(FLAGSPSNR)
1176 I1 --- FSPBPS Source may lie within an overdense
region near a bright point source
(FLAGSPBPS)
1178 I1 --- FSPSCL Source may lie within an overdense
region near a stellar cluster
(FLAGSPSCL)
1180 I1 --- FSPLGA Source may lie within an overdense
region near a local large galaxy
(FLAGSPLGA)
1182 I1 --- FSPGCCons Source may lie within an overdense
region near a galaxy cluster
(FLAGSPGC_CONS)
1184 I1 --- FNORADEeRR Source contained no RADEC_ERR in the
pre-processed version of the catalogue
(FLAGNORADEC_ERR)
1186 I1 --- FNOEXTeRR Source contained no EXT_ERR in the
pre-processed version of the catalogue
(FLAGNOEXT_ERR)
1188 I1 --- FNOCTSeRR Source contained no CTS_ERR in the
pre-processed version of the catalogue
(FLAGNOCTS_ERR)
1190 I1 --- FOpt Source matched within 15'' with a
bright optical star, likely
contaminated by optical loading
(FLAG_OPT)
1192 I1 --- InAllLS10 True if the source is within the
LS10 MOC (InAllLS10)
1194-1198 I5 --- LS10rel Release column denotes the camera and
filter set used (from LS10)
(LS10_RELEASE)
1200-1205 I6 --- LS10brick Brick ID column (from LS10)
(LS10_BRICKID)
1207-1211 I5 --- LS10objid Object (LS10_OBJID)
1213-1227 F15.11 deg RALdeg LS10 right ascension (J2000)
(from LS10) (LS10_RA)
1229-1243 F15.11 deg DELdeg LS10 declination (J2000) (from LS10)
(LS10_DEC)
1245-1259 F15.11 --- LS10Xpr Probability that the LS10 source is an
X-ray emitter (LS10Xrayproba)
1261-1269 F9.6 --- SepLS10-ERO Separation between the LS10 source and
the eROSITA position (Separation_max)
1271-1278 F8.6 --- pany Probability that the X-ray source has
a counterpart (p_any)
1280-1287 F8.6 --- pi Relative probability of the LS10
counterpart (p_i)
1289-1291 A3 --- Type Type (from LS10), indicating whether
the optical source is point-like (PSF)
or extended (not PSF) (TYPE)
1293-1304 E12.6 3.63uJy Fg g band flux (from LS10) (FLUX_G)
1306-1317 E12.6 3.63uJy Fr r band flux (from LS10) (FLUX_R)
1319-1330 E12.6 3.63uJy Fi i band flux (from LS10) (FLUX_I)
1332-1343 E12.6 3.63uJy Fz z band flux (from LS10) (FLUX_Z)
1345-1356 E12.6 3.63uJy FW1 W1 (unWISE) flux (from LS10) (FLUX_W1)
1358-1369 E12.6 3.63uJy FW2 W2 (unWISE) flux (from LS10) (FLUX_W2)
1371-1382 E12.6 --- FGivar Inverse variance of G band flux
(from LS10) (FLUXIVARG)
1384-1395 E12.6 --- FRivar Inverse variance of R band flux
(from LS10) (FLUXIVARR)
1397-1408 E12.6 --- FIivar Inverse variance of I band flux
(from LS10) (FLUXIVARI)
1410-1421 E12.6 --- FZivar Inverse variance of Z band flux
(from LS10) (FLUXIVARZ)
1423-1431 F9.6 --- FW1ivar Inverse variance of W1 flux (from LS10)
(FLUXIVARW1)
1433-1440 F8.6 --- FW2ivar Inverse variance of W2 flux (from LS10)
(FLUXIVARW2)
1442-1450 F9.6 --- ShapeR Half-light radius of sources where the
type is not PSF (from LS10) (SHAPE_R)
1452-1463 E12.6 --- ShapeRivar Inverse variance on the half-light
radius (from LS10) (SHAPERIVAR)
1465-1473 F9.6 --- ShapeE1 Ellipticity component 1 for sources
where the type is not PSF (from LS10)
(SHAPE_E1)
1475-1486 E12.6 --- ShapeE1ivar Inverse variance of ellipticity
component 1 (from LS10)
(SHAPEE1IVAR)
1488-1496 F9.6 --- ShapeE2 Ellipticity component 2 (complex
component) for sources where the type
is not PSF (from LS10) (SHAPE_E2)
1498-1509 E12.6 --- ShapeE2ivar Inverse variance of ellipticity
component 2 (from LS10)
(SHAPEE2IVAR)
1511-1512 A2 --- RefCat [3EGL] Reference catalogue taken from
LS10; Tycho-2, Gaia EDR3 or SGA
(from LS10) (REF_CAT)
1514-1532 I19 --- RefId ID from reference catalogue (from LS10)
(REF_ID)
1534-1544 F11.6 mas plx Reference catalogue parallax
(from LS10) (PARALLAX)
1546-1557 E12.6 mas-2 plxivar Inverse variance of parallax
(from LS10) (PARALLAX_IVAR)
1559-1570 E12.6 --- zZSPEC ?=- Redshift from spectroscopic
redshift compilation (redshift_ZSPEC)
1572-1583 E12.6 --- e_zZSPEC ?=- Error on redshift from compilation
(redshifterrZSPEC)
1585-1616 A32 --- r_zZSPEC ?=- Reference from which spectroscopic
redshift was retrieved (ref_ZSPEC)
1618-1629 E12.6 --- zNED NED spectroscopic redshift
(redshift_NED)
1631-1642 E12.6 --- zQuaia ?=- Redshift from Quaia
(redshift_quaia)
1644-1655 E12.6 --- e_zQuaia ?=- Error on redshift from Quaia
(redshiftquaiaerr)
1657-1665 F9.6 mag g0mag ?=- g band flux converted to magnitude,
corrected for Milky Way (MW) reddening
(deredmagg)
1667-1675 F9.6 mag r0mag ?=- r band flux converted to magnitude,
corrected for MW reddening
(deredmagr)
1677-1685 F9.6 mag z0mag ?=- z band flux converted to magnitude,
corrected for MW reddening
(deredmagz)
1687-1695 F9.6 mag W10mag ?=- W1 band flux converted to
magnitude, corrected for MW reddening
(deredmagw1)
1697-1705 F9.6 mag W20mag ?=- W2 band flux converted to
magnitude, corrected for MW reddening
(deredmagw2)
1707-1718 E12.6 mW/m2 MLFlux12 Summed X-ray flux from band 1
(0.2-0.6 keV) and 2 (0.6-2.3 keV)
(MLFLUX12)
1720 I1 --- GaiaMvg5s Whether or not the parallax is
significant at or above the 5 sigma
level (Gaiamoving5sigma)
1722-1730 F9.6 mag rmag ?=- r magnitude, not corrected for
Galactic reddening (r_mag)
1732-1745 A14 --- SWIFTBAT70 Swift-BAT 70-month hard X-ray survey
source name (JHHMM.m+DDMMAN)
(SWIFT_SWIFTBAT70)
1747 I1 --- hardonly [0/1] Flag for whether or not the
source is hard-only (1 if true,
0 if false (hardonly)
1749 I1 --- r_zbest [0/5] Origin of the redshift; 5 means
redshift catalogue, 2 means NED, 1
means Quaia, 0 means no redshift
(redshift_source)
1751-1759 F9.6 --- zbest ?=- Final, best spectroscopic redshift
as described in the text
(redshift_best)
1761 I1 --- SIMBADKG ?=- If the source is classified as
Galactic in SIMBAD
(SIMBADknowngalactic)
1763 I1 --- ClassBeamed [0/3]?=- Flag for if the source appears
to be beamed (class_beamed) (3)
--------------------------------------------------------------------------------
Note (1): Use SKYTILE+ID_SRC to identify the corresponding source productsr.
Note (2): It equals CatID*1011+SKYTILE*105+ID_SRC, where catID is 1 for the
1B detected Main and Supp catalogs and 2 for the 3B detected Hard catalog.
Note (3): ClassBeamed flag as follows:
3 = is in SIMBAD, as some form of beamed AGN
2 = is in CRATES
1 = is in BZCAT
0 = is not in any of these catalogues
--------------------------------------------------------------------------------
Byte-by-byte Description of file: outls10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 --- IAUName String containing the official IAU
name of the source (IAUNAME)
25- 56 A32 --- DetUId String unique detection ID (DETUID)
58- 63 I6 --- SkyTile Sky tile ID (SKYTILE)
65- 68 I4 --- IdSrc Source ID in each sky tile
(ID_SRC) (1)
70- 81 I12 --- UId Unique detection ID (UID) (2)
83- 95 I13 --- UId1B 1B catalog UID of the source with a
strong association, or -UID if the
association is weak (UID_1B)
97- 100 I4 --- IdCluster Group ID of simultaneously fitted
sources (ID_CLUSTER)
102- 116 F15.11 deg RAdeg Right ascension (ICRS),
corrected (RA)
118- 132 F15.11 deg DEdeg Declination (ICRS), corrected (DEC)
134- 148 F15.11 deg RARdeg Right ascension (ICRS),
uncorrected (RA_RAW)
150- 164 F15.11 deg DERdeg Declination (ICRS),
uncorrected (DEC_RAW)
166- 173 F8.6 deg e_RAdeg ?=- 1-sigma lower error on RA
(RA_LOWERR)
175- 183 F9.6 deg E_RAdeg 1-sigma upper error on RA (RA_UPERR)
185- 193 F9.6 deg e_DEdeg 1-sigma lower error on DEC
(DEC_LOWERR)
195- 202 F8.6 deg E_DEdeg ?=- 1-sigma upper error on DEC
(DEC_UPERR)
204- 212 F9.6 --- posErr 1-sigma positional uncertainty
(POS_ERR)
214- 222 F9.6 --- RADEErr Combined positional error, raw output
from PSF fitting (RADEC_ERR)
224- 238 F15.11 deg GLON Galactic longitude (LII)
240- 254 F15.11 deg GLAT Galactic latitude (BII)
256- 270 F15.11 deg ELON Ecliptic longitude (ELON)
272- 286 F15.11 deg ELAT Ecliptic latitude (ELAT)
288- 294 F7.1 d MJD Modified Julian Date of the
observation of the source nearest to
the optical axis of the telescope
(MJD)
296- 302 F7.1 d b_MJD Modified Julian Date of the first
observation of the source (MJD_MIN)
304- 310 F7.1 d B_MJD Modified Julian Date of the last
observation of the source (MJD_MAX)
312- 319 F8.6 arcsec Ext Source Extent Parameter (EXT)
321- 328 F8.6 arcsec s_Ext 1-sigma error on Ext (EXT_ERR)
330- 337 F8.6 arcsec e_Ext 1-sigma lower error on Ext
(EXT_LOWERR)
339- 346 F8.6 arcsec E_Ext 1-sigma upper error on Ext
(EXT_UPERR)
348- 355 F8.6 --- ExtLike Extent likelihood (EXT_LIKE)
357- 368 E12.6 ct Mlcts0 Source net counts in 0.2-5.0 keV band
(MLCTS0)
370- 383 F14.7 ct s_Mlcts0 1-sigma combined counts error in
0.2-5.0 keV band (MLCTSERR_0)
385- 394 F10.6 ct/s MLRate0 Source count rate in 0.2-5.0 keV band
(MLRATE0)
396- 404 F9.6 ct/s s_MLRate0 1-sigma combined count rate error in
0.2-5.0 keV band (MLRATEERR_0)
406- 417 E12.6 mW/m2 MLFlux0 Source flux in 2.3-5.0 keV band
(MLFLUX0)
419- 430 E12.6 mW/m2 e_MLFlux0 1-sigma combined error on flux in
0.2-5.0 keV band (MLFLUXERR_0)
432- 443 E12.6 --- DetLike0 Detection likelihood in 0.2-5.0 keV
band (DETLIKE0)
445- 458 F14.8 arcmin-2 MLBkg0 Background at the source position in
the 0.2-5.0 keV band (MLBKG0)
460- 473 F14.8 ct Mlcts1 Source net counts in 0.2-0.6 keV band
(MLCTS1)
475- 484 F10.6 ct s_Mlcts1 ?=- 1-sigma combined counts error in
0.2-0.6 keV band (MLCTSERR_1)
486- 499 F14.9 ct e_Mlcts1 ?=- 1-sigma lower counts error in
0.2-0.6 keV band (MLCTSLOWERR_1)
501- 514 F14.9 ct E_Mlcts1 ?=- 1-sigma upper counts error in
0.2-0.6 keV band (MLCTSUPERR_1)
516- 524 F9.6 ct/s MLRate1 Source count rate in 0.2-0.6 keV band
(MLRATE1)
526- 533 F8.6 ct/s s_MLRate1 ?=- 1-sigma combined count rate error
in 0.2-0.6 keV band (MLRATEERR_1)
535- 542 F8.6 ct/s e_MLRate1 ?=- 1-sigma lower count rate error in
0.2-0.6 keV band (MLRATELOWERR_1)
544- 551 F8.6 ct/s E_MLRate1 ?=- 1-sigma upper count rate error in
0.2-0.6 keV band (MLRATEUPERR_1)
553- 564 E12.6 mW/m2 MLFlux1 Source flux in 0.2-0.6 keV band
(MLFLUX1)
566- 577 E12.6 mW/m2 s_MLFlux1 ?=- 1-sigma combined error on flux in
0.2-0.6 keV band (MLFLUXERR_1)
579- 590 E12.6 mW/m2 e_MLFlux1 ?=- 1-sigma lower error on flux in
0.2-0.6 keV band (MLFLUXLOWERR_1)
592- 603 E12.6 mW/m2 E_MLFlux1 ?=- 1-sigma upper error on flux in
0.2-0.6 keV band (MLFLUXUPERR_1)
605- 616 E12.6 --- DetLike1 ?=- Detection likelihood in
0.2-0.6 keV band (DETLIKE1)
618- 631 F14.9 arcmin-2 MLBkg1 Background at the source position in
the 0.2-0.6 keV band (MLBKG1)
633- 643 F11.6 s MLExp1 Vignetted exposure time at the source
position in 0.2-0.6 keV band
(MLEXP1)
645- 652 F8.6 --- MLeef1 Enclosed energy fraction in
0.2-0.6 keV band (MLEEF1)
654- 658 I5 ct Apcts1 Total counts extracted within the
aperture in 0.2-0.6 keV band
(APECTS1)
660- 670 F11.6 ct ApBkg1 Background counts extracted within
the aperture in 0.2-0.6 keV band,
excluding nearby sources using the
source map (APEBKG1)
672- 682 F11.6 s ApExp1 Exposure map value in 0.2-0.6 keV
band at the given position
(APEEXP1)
684- 690 F7.5 pix ApRad1 Extraction radius in pixels (4'') in
the 0.2-0.6 keV band (APERADIUS1)
692- 699 F8.6 --- ApPois1 ?=- Poisson probability that the
extracted counts (APECTS1) are a
background fluctuation (APEPOIS1)
701- 714 F14.7 ct Mlcts2 Source net counts in 0.6-2.3 keV band
(MLCTS2)
716- 728 F13.7 ct s_Mlcts2 ?=- 1-sigma combined counts error in
0.6-2.3 keV band (MLCTSERR_2)
730- 742 F13.7 ct e_Mlcts2 ?=- 1-sigma lower counts error in
0.6-2.3 keV band (MLCTSLOWERR_2)
744- 756 F13.7 ct E_Mlcts2 ?=- 1-sigma upper counts error in
0.6-2.3 keV band (MLCTSUPERR_2)
758- 766 F9.6 ct/s MLRate2 Source count rate in 0.6-2.3 keV band
(MLRATE2)
768- 776 F9.6 ct/s s_MLRate2 ?=- 1-sigma combined count rate error
in 0.6-2.3 keV band (MLRATEERR_2)
778- 785 F8.6 ct/s e_MLRate2 ?=- 1-sigma lower count rate error in
0.6-2.3 keV band (MLRATELOWERR_2)
787- 795 F9.6 ct/s E_MLRate2 ?=- 1-sigma upper count rate error in
0.6-2.3 keV band (MLRATEUPERR_2)
797- 808 E12.6 mW/m2 MLFlux2 Source flux in 0.6-2.3 keV band
(MLFLUX2)
810- 821 E12.6 mW/m2 s_MLFlux2 ?=- 1-sigma combined error on flux
in 0.6-2.3 keV band (MLFLUXERR_2)
823- 834 E12.6 mW/m2 e_MLFlux2 ?=- 1-sigma lower error on flux in
0.6-2.3 keV band (MLFLUXLOWERR_2)
836- 847 E12.6 mW/m2 E_MLFlux2 ?=- 1-sigma upper error on flux in
0.6-2.3 keV band (MLFLUXUPERR_2)
849- 860 E12.6 --- DetLike2 Detection likelihood in 0.6-2.3 keV
band (DETLIKE2)
862- 875 F14.8 arcmin-2 MLBkg2 Background at the source position in
the 0.6-2.3 keV band (MLBKG2)
877- 887 F11.6 s MLExp2 Vignetted exposure time at the source
position in 0.6-2.3 keV band
(MLEXP2)
889- 896 F8.6 --- MLeef2 Enclosed energy fraction in
0.6-2.3 keV band (MLEEF2)
898- 903 I6 ct Apcts2 Total counts extracted within the
aperture in 0.6-2.3 keV band
(APECTS2)
905- 918 F14.9 ct ApBkg2 Background counts extracted within
the aperture in 0.6-2.3 keV band,
excluding nearby sources using the
source map (APEBKG2)
920- 930 F11.6 s ApExp2 Exposure map value in 0.6-2.3 keV
band at the given position
(APEEXP2)
932- 938 F7.5 pix ApRad2 Extraction radius in pixels (4'') in
the 0.6-2.3 keV band (APERADIUS2)
940- 947 F8.6 --- ApPois2 ?=- Poisson probability that the
extracted counts (APECTS2) are a
background fluctuation (APEPOIS2)
949- 960 F12.7 ct Mlcts3 Source net counts in 2.3-5.0 keV band
(MLCTS3)
962- 970 F9.5 ct s_Mlcts3 ?=- 1-sigma combined counts error in
2.3-5.0 keV band (MLCTSERR_3)
972- 979 F8.5 ct e_Mlcts3 ?=- 1-sigma lower counts error in
2.3-5.0 keV band (MLCTSLOWERR_3)
981- 989 F9.5 ct E_Mlcts3 ?=- 1-sigma upper counts error in
2.3-5.0 keV band (MLCTSUPERR_3)
991- 999 F9.6 ct/s MLRate3 Source count rate in 2.3-5.0 keV band
(MLRATE3)
1001-1008 F8.6 ct/s s_MLRate3 ?=- 1-sigma combined count rate error
in 2.3-5.0 keV band (MLRATEERR_3)
1010-1017 F8.6 ct/s e_MLRate3 ?=- 1-sigma lower count rate error in
2.3-5.0 keV band (MLRATELOWERR_3)
1019-1026 F8.6 ct/s E_MLRate3 ?=- 1-sigma upper count rate error in
2.3-5.0 keV band (MLRATEUPERR_3)
1028-1039 E12.6 mW/m2 MLFlux3 Source flux in 2.3-5.0 keV band
(MLFLUX3)
1041-1052 E12.6 mW/m2 s_MLFlux3 ?=- 1-sigma combined error on flux in
2.3-5.0 keV band (MLFLUXERR_3)
1054-1065 E12.6 mW/m2 e_MLFlux3 ?=- 1-sigma lower error on flux in
2.3-5.0 keV band (MLFLUXLOWERR_3)
1067-1078 E12.6 mW/m2 E_MLFlux3 ?=- 1-sigma upper error on flux in
2.3-5.0 keV band (MLFLUXUPERR_3)
1080-1091 E12.6 --- DetLike3 Detection likelihood in 2.3-5.0 keV
band (DETLIKE3)
1093-1104 E12.6 arcmin-2 MLBkg3 Background at the source position in
the 2.3-5.0 keV band (MLBKG3)
1106-1117 E12.6 s MLExp3 Vignetted exposure time at the source
position in 2.3-5.0 keV band
(MLEXP3)
1119-1126 F8.6 --- MLeef3 Enclosed energy fraction in
2.3-5.0 keV band (MLEEF3)
1128-1131 I4 ct Apcts3 Total counts extracted within the
aperture in 2.3-5.0 keV band
(APECTS3)
1133-1143 F11.6 ct ApBkg3 Background counts extracted within
the aperture in 2.3-5.0 keV band,
excluding nearby sources using the
source map (APEBKG3)
1145-1155 F11.6 s ApExp3 Exposure map value in 2.3-5.0 keV
band at the given position
(APEEXP3)
1157-1164 F8.5 pix ApRad3 Extraction radius in pixels (4'') in
the 2.3-5.0 keV band (APERADIUS3)
1166-1177 E12.6 --- ApPois3 ?=- Poisson probability that the
extracted counts (APECTS3) are a
background fluctuation (APEPOIS3)
1179 I1 --- FSPSNR Source may lie within an overdense
region near a supernova remnant
(FLAGSPSNR)
1181 I1 --- FSPBPS Source may lie within an overdense
region near a bright point source
(FLAGSPBPS)
1183 I1 --- FSPSCL Source may lie within an overdense
region near a stellar cluster
(FLAGSPSCL)
1185 I1 --- FSPLGA Source may lie within an overdense
region near a local large galaxy
(FLAGSPLGA)
1187 I1 --- FSPGCCons Source may lie within an overdense
region near a galaxy cluster
(FLAGSPGC_CONS)
1189 I1 --- FNORADEeRR Source contained no RADEC_ERR in the
pre-processed version of the
catalogue (FLAGNORADEC_ERR)
1191 I1 --- FNOEXTeRR Source contained no EXT_ERR in the
pre-processed version of the
catalogue (FLAGNOEXT_ERR)
1193 I1 --- FNOCTSeRR Source contained no CTS_ERR in the
pre-processed version of the
catalogue (FLAGNOCTS_ERR)
1195 I1 --- FOpt Source matched within 15'' with a
bright optical star, likely
contaminated by optical loading
(FLAG_OPT)
1197-1215 I19 --- Quaia ?=- Closest match Quaia source ID
(Quaiasourceid)
1217-1235 F19.17 --- zQuaia ?=- Quaia redshift (redshift_quaia)
1237-1256 F20.18 --- e_zQuaia ?=- Error on Quaia redshift
(redshiftquaiaerr)
1258-1276 I19 --- GaiaUnwise ?=- Closest match Gaia/UNWISE source
ID (Gaiaunwisesourceid)
1278-1296 F19.17 --- zphGaiaUnwise ?=- Gaia/UNWISE Photo-z
(GaiaunwisePHOT_Z)
1298-1322 A25 --- Milliqso Milliquas catalogue source name
(Milliqso_NAME)
1324-1328 F5.3 --- zMilliqso ?=- Milliquas catalogue redshift
(Milliqso_Z)
1330-1335 A6 --- r_zMilliqso Milliquas catalogue redshift
reference (Milliqso_ZCITE)
--------------------------------------------------------------------------------
Note (1): Use SKYTILE+ID_SRC to identify the corresponding source products
Note (2): It equals CatID*1011+SKYTILE*105+ID_SRC, where catID is 1 for the
1B detected Main and Supp catalogs and 2 for the 3B detected Hard catalog
--------------------------------------------------------------------------------
Acknowledgements:
From Johannes Buchner, jbuchner(at)mpe.mpg.de
This work is based on data from eROSITA, the soft X-ray instrument on
bo ard SRG, a joint Russian-German science mission supported by the
Russian Space Agency (Roskosmos), in the interests of the Russian
Academy of Sciences represent ed by its Space Research Institute
(IKI), and the Deutsches Zentrum fuer Luft- und Raumfahrt (DLR). The
SRG spacecraft was built by Lavochkin Association (NPOL) and its
subcontractors, and is operated by NPOL with support from the Max
Planck Institute for Extraterrestrial Physics (MPE).
The development and construction of the eROSITA X-ray instrument was
led by MPE, with contributions from the Dr. Karl Remeis Observatory
Bamberg & ECAP (FAU Erlangen-Nuernberg), the University of Hamburg
Observatory, the Leibniz Institute for Astrophysics Potsdam (AIP), and
the Institute for Astronomy and Astrophysics of the University of
Tuebingen, with the support of DLR and the Max Planck Society. The
Argelander Institute for Astronomy of the University of Bonn and the
Ludwig Maximilians Universitat Munich also participated in the
science preparation for eROSITA.
The eROSITA data shown here were processed using the eSASS/NRTA
software system developed by the German eROSITA consortium.
The Legacy Surveys consist of three individual and complementary
projects: the Dark Energy Camera Legacy Survey (DECaLS; Proposal ID
#2014B-0404; PIs: David Schlegel and Arjun Dey), the Beijing-Arizona
Sky Survey (BASS; NOAO Prop. ID #2015A-0801; PIs: Zhou Xu and Xiaohui
Fan), and the Mayall z-band Legacy Survey (MzLS; Prop. ID #2016A-0453;
PI: Arjun Dey). DECaLS, BASS and MzLS together include data obtained,
respectively, at the Blanco telescope, Cerro Tololo Inter-American
Observatory, NSF's NOIRLab; the Bok telescope, Steward Observatory,
University of Arizona; and the Mayall telescope, Kitt Peak National
Observatory, NOIRLab. Pipeline processing and analyses of the data
were supported by NOIRLab and the Lawrence Berkeley National
Laboratory (LBNL). The Legacy Surveys project is honored to be
permitted to conduct astronomical research on Iolkam Du'ag (Kitt
Peak), a mountain with particular significance to the Tohono O'odham
Nation.
NOIRLab is operated by the Association of Universities for Research in
Astronomy (AURA) under a cooperative agreement with the National
Science Foundation. LBNL is managed by the Regents of the University
of California under contract to the U.S. Department of Energy.
This project used data obtained with the Dark Energy Camera (DECam),
which was constructed by the Dark Energy Survey (DES) collaboration.
Funding for the DES Projects has been provided by the U.S. Department
of Energy, the U.S. National Science Foundation, the Ministry of
Science and Education of Spain, the Science and Technology Facilities
Council of the United Kingdom, the Higher Education Funding Council
for England, the National Center for Supercomputing Applications at
the University of Illinois at Urbana-Champaign, the Kavli Institute of
Cosmological Physics at the University of Chicago, Center for
Cosmology and Astro-Particle Physics at the Ohio State University, the
Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M
University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas
Filho de Amparo, Financiadora de Estudos e Projetos, Fundacao Carlos
Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro,
Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the
Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche
Forschungsgemeinschaft and the Collaborating Institutions in the Dark
Energy Survey. The Collaborating Institutions are Argonne National
Laboratory, the University of California at Santa Cruz, the University
of Cambridge, Centro de Investigaciones Energeticas, Medioambientales
y Tecnologicas-Madrid, the University of Chicago, University College
London, the DES-Brazil Consortium, the University of Edinburgh, the
Eidgenossische Technische Hochschule (ETH) Zurich, Fermi National
Accelerator Laboratory, the University of Illinois at
Urbana-Champaign, the Institut de Ciencies de l'Espai (IEEC/CSIC),
the Institut de Fisica d'Altes Energies, Lawrence Berkeley National
Laboratory, the Ludwig Maximilians Universitat Munchen and the
associated Excellence Cluster Universe, the University of Michigan,
NSF's NOIRLab, the University of Nottingham, the Ohio State
University, the University of Pennsylvania, the University of
Portsmouth, SLAC National Accelerator Laboratory, Stanford University,
the University of Sussex, and Texas A&M University.
BASS is a key project of the Telescope Access Program (TAP), which has
been funded by the National Astronomical Observatories of China, the
Chinese Academy of Sciences (the Strategic Priority Research Program
"The Emergence of Cosmological Structures" Grant # XDB09000000),
and the Special Fund for Astronomy from the Ministry of Finance. The
BASS is also supported by the External Cooperation Program of Chinese
Academy of Sciences (Grant # 114A11KYSB20160057), and Chinese National
Natural Science Foundation (Grant # 12120101003, # 11433005).
The Legacy Survey team makes use of data products from the Near-Earth
Object Wide-field Infrared Survey Explorer (NEOWISE), which is a
project of the Jet Propulsion Laboratory/California Institute of
Technology. NEOWISE is funded by the National Aeronautics and Space
Administration.
The Legacy Surveys imaging of the DESI footprint is supported by the
Director, Office of Science, Office of High Energy Physics of the U.S.
Department of Energy under Contract No. DE-AC02-05CH1123, by the
National Energy Research Scientific Computing Center, a DOE Office of
Science User Facility under the same contract; and by the U.S.
National Science Foundation, Division of Astronomical Sciences under
Contract No. AST-0950945 to NOAO.
MB and BM are supported by the European Union's Innovative Training
Network (ITN) "BiD4BEST", funded by the Marie Sklodowska-Curie Actions
in Horizon 2020 (GA N. 860744). ZI and JW acknowledge support by the
Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)
under Germany's Excellence Strategy - EXC-2094 - 390783311.
This research has made use of the SIMBAD database, operated at CDS,
Strasbourg, France. The following software packages/tools were also
used: astropy, matplotlib, numpy, topcat, xspec.
(End) Patricia Vannier [CDS] 08-Jan-2026