J/A+A/709/A12ivo://CDS.VizieR/J/A+A/709/A12CDSImam K.Torres-Alba N.Marchesi S.Ajello M.Joffre S.Cox I.,Pizzetti A.Zhao X.Segreto A.Banerjee A.Pal I.Gianolli V.E.,Stern D.2026-05-19T14:14:26Z2026-04-28T11:56:31ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frsurveysactive-galactic-nucleix-ray-sourcesWe present a comprehensive catalog of 251 potential counterparts for 250 unassociated hard X-ray sources detected in the Swift- Burst Alert Telescope (BAT) 150-month hard X-ray survey. Over 150 months of observation, BAT has detected 2339 sources in the 15-150keV range. Among these, 344 do not have a low-energy counterpart. Our study focuses on the analysis of soft X-ray observations (i.e., at energies <10keV) spatially overlapping with these Swift-BAT new hard X-ray sources. Such observations were taken with Chandra, Swift-XRT, eROSITA, and XMM-Newton. Within the sample of 251 potential counterparts, 94 (37%) are identified as AGN and 58 (23%) as galaxies. The rest of the 99 (40%) sources include pulsars, cataclysmic variables and unclassified soft X-ray (0.5-10keV) counterparts. Redshift data is available for 139 out of the 251 sources, and its distribution is in close agreement with the redshift distribution of previous BAT catalogs. We also present the results of a small optical spectroscopy campaign of 9 (out of 58) galaxies. The majority of these turned out to be Seyfert 2 galaxies at a redshift slightly larger than the median of the BAT AGN sample.2026A&A...709A..12Ihttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/709/A12CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)J/ApJ/829/7 : The third Swift/BAT GRB catalog (past ~11yrs) (BAT3)J/ApJS/235/4 : The 105-month Swift-BAT all-sky hard X-ray survey (Oh+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/709/A12https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/709/A12http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/709/A12https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/709/A12https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/709/A12http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/709/A12GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/709/A12/catalog (Swift BAT 150 month catalog (table 2))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/709/A12/catalog?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/709/A12/catalog?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/709/A12/catalog?GETtext/xml+votable180.050000true0.39511.2170.0055555555555555566/191 302 475 717 942 1084 1125 1276 1320 1465 1568 1688 1701 1852 1925 2091 2188 2319 2485 2494 2505 2552 2634 2671 2937-2938 2966 3357 3403 3491 3734 3865 3927 4026 5918 5920 6157 6270 6324 6360-6361 6426 6534 6701 6729 7060 7118 7539 7815 8357 8396 8939 8946 8960 9075 9201 9250 9685 9722 9725 9890 10067 10597 10777 10959 11328 11348 11372 11657 11717 11743 11872 11965 12030 12035 12212 12241 12399 12455 12547 13135 13210 13264 13279 13287 13380 13383 13393 13733 13743 13748 13819 13905 13960 14000 14025 14045 14271 14354 14420 14497 14592 14803 14827 14880 14924 14941 15075 15112 15188 15406 15459 15640 15719 15915 16125 16308 16363 16843 17061 17427 17471 17518 18216 18253 18415 18731 19261 19307 19636 19641 19651 19656 19972 20095 20175 20192 20301 20984 21507 21635 22969 23057 23095 23269 23669 24119 24293 24674 24933 25064 25378 25439 25661 25812 25883 26584 26913 27894 28236 28479 28581 28776 28793 28805 28826-28827 28830-28832 28848 28856-28857 28868-28869 28900 28905 28915 29090 29099 29101 29103 29108 29113-29115 29118 29234 29255 29270 29468-29469 29534 29564 29649 30145 30220 30229 30306 30319 30321 30408 30412 30416 30507 30608 30617 30626 30722 30866 30936 31100 31813 32104 32332 32887 32992 33087 33179 33385 33433 33589 33644 33992 34121 34481 34495 34590 34994 35083 35420 35445 35497 36098 36462 36493 37112 37369 37568 37694 37742 37874 38207 38255 38459 38990 39235 39238 39241 39355 39542 39985 40543 40585 40697 40747 40770 41240 41258 41400 41444 41678 41683 41685 41752 41754 41758 42076 42096 42143 42162 42200 42227 42298 42309 42314 42336 42379 42383 42386 42404 42410 42435 42514 42689 42781 42809 42826 42973 43106 43278 43299 43346 43382 43390 43464 43632 43782 43833 43867 44486 44785 44845 45013 45202 45335 45524 45567 45854-45855 45934 46051 46055 46066 46191 46318 46550 46846 47114 47158 47169-47170 47187 47259 47268 47329 47490 47510 47534 47786 47800 47986 48030 48042 48187 48328 48608 48687 48760https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/709/A12?format=asciiX-raydefaultJ/A+A/709/A12/catalogSwift BAT 150 month catalog (table 2)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintBATSwift-BAT source name (JHHMM.m+DDMM)meta.id;meta.maincharRAJ2000Right ascension of the BAT source (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of the BAT source (J2000)degpos.eq.dec;meta.mainR95BAT positional error radius at 95 percent confidencearcminstat.error;phys.angSize;arith.ratiofloatFlagsFlags describing the counterpart association (1)meta.code.errorcharRAOdegRight ascension of the counterpart (J2000)degpos.eq.raDEOdegDeclination of the counterpart (J2000)degpos.eq.decGLONGalactic longitude of the counterpartdegpos.galactic.lonGLATGalactic latitude of the counterpartdegpos.galactic.latdoubleCtpAdopted name of the identified counterpart in NEDmeta.idcharTypeSource classificationsrc.classcharz? Redshift of the source, when availablesrc.redshiftfloatnullableJ/A+A/709/A12/table3Counterpart types of BAT sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTypeCounterpart classificationsrc.classcharNsrcbgt10Number of sources with |b| > 10 degmeta.numberintNsrcblt10Number of sources with |b| < 10 degmeta.numberintNtotalTotal number of sources in the samplemeta.numberintJ/A+A/709/A12/table5Summary of the sources in our with a counterpart in the 4FGL-DR4 catalogCptBATAdopted BAT counterpart namemeta.idcharAssoc4FGLAssociated source in the 4FGL-DR4 catalogmeta.id.assoccharCpt4FGLCounterpart of the 4FGL sourcemeta.id.assoccharType4FGL source classificationsrc.classcharNameSwift-BAT source namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJ/A+A/709/A12/table4Mean and Median of redshift distributionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintCatalogName of the catalog (JHHMM.m+DDMM)meta.id;meta.maincharzmeanMean redshift computed for the samplesrc.redshiftfloate_zmeanUncertainty on the mean redshiftstat.errorfloatzmedianMedian redshift computed for the samplesrc.redshift;pos.heliocentricfloate_zmedianUncertainty on the median redshiftstat.errorfloatJ/A+A/709/A12/table6Summary of the originally unclassified sources in our that were followed-up with optical spectroscopyrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSwift-BAT source name (JHHMM.m+DDMM)meta.id;meta.maincharCptOptical counterpart namemeta.idcharOptTypeOptical spectral classificationsrc.classcharzRedshift derived from optical spectroscopysrc.redshiftfloatInstSpectroscopic instrument usedinstr.setupchar