J/A+A/692/A147ivo://CDS.VizieR/J/A+A/692/A147doi:10.26093/cds/vizier.36920147CDSKosiba M.Massaro F.Paggi A.Pena-Herazo H.A.Masetti N.,Chavushyan V.Bottacini E.Werner N.2025-02-26T20:02:14Z2024-12-09T09:18:28ZCDS support team

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

cds-question@unistra.frx-ray-sourcesIt has been established that the sources contributing to the cosmic X-ray background (CXB) emission are mainly nearby active galactic nuclei (AGNs), in particular those that are obscured. Thus, it is important to fully identify the hard X-ray sky source population to accurately characterize the individual contribution of different AGNs to the overall CXB emission. We present a follow-up analysis of all the 218 sources marked as unidentified in our previous revision of the third release of the Palermo Swift-BAT hard X-ray catalog (3PBC) based on our multifrequency classification scheme. These 218 sources were classified as unidentified in our previous analyses because they lack an assigned low-energy counterpart. We searched for soft X-ray counterparts of these 218 3PBC sources in archival Swift-XRT observations obtained between 2005 January 1st and 2018 August 1st. In particular, we found 1213 archival Swift-XRT observations for 192 of the 218 unidentified sources. We found 93 possible Swift-XRT counterparts inside of the Swift-BAT positional uncertainty regions. These correspond to 73 3PBC sources, where 60 have only a single Swift-XRT detection and 13 sources have multiple detections. We present a catalog of all the detected possible counterparts of the yet unidentified hard X-ray sources to the community as a catalog for future spectroscopic follow-up targets, together with a short catalog of our classification of the ten sources for which we found available spectra.2024A&A...692A.147Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/692/A147CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/524/A64 : The 54-month Palermo BAT-survey catalogue (Cusumano+, 2010)J/A+A/670/A171 : Second release of the Turin-SyCAT catalog (Kosiba+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/692/A147https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/692/A147http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/692/A147https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/692/A147https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/692/A147http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/692/A147GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/692/A147/candctp (All 93 detected soft X-ray Swift-XRT sources within the BAT positional uncertainty)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/692/A147/candctp?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/692/A147/candctp?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/692/A147/candctp?GETtext/xml+votable180.050000true4.15475-26.24061670.0055555555555555566/997 1069 1179 2116 2397 2512 4204 4993 5983 7098 7778 7936 8450 8913 9729 11582 12694 12922 12955 13730 14497 14666 14723 15662 15804 16201 16272 16507 19954 20288 20620 23873 25435 25660 27009 27420 28106 28259 28650 29310 30262 30698 31781 31979 32104 32868 32955 33419 33512 33652 33973 35088 35104 35671 37480 38116 38160 39314 39722 39987 40472 40728 41020 41383 41754 42194 42393 42455 44139 46578 47181 47232 47838https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/692/A147?format=asciiX-raydefaultJ/A+A/692/A147/candctpAll 93 detected soft X-ray Swift-XRT sources within the BAT positional uncertaintyCRateCount rate (count_rate)ct/sphot.count;em.X-raydoublee_CRateCount rate error (err_count_rate)ct/sstat.errordoubleSNRfullSignal to Noise (S/N) in full band (0.5-10keV) (SNR_full)stat.snrfloatSNRhard? S/N in the hard band (2-10keV) (SNR_hard)stat.snrfloatnullableSNRsoft? S/N in the soft band (0.5-2keV) (SNR_soft)stat.snrfloatnullableNobsNumber of observations (N_obs)meta.numberintTexpApproximated total integrated exposure time (T_exp)stime.duration;obs.exposureintWISEWISE name of the source if found in the WISE catalog (WISE_Name)meta.idcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClassindicates a mltiwavelength classification in table class.datmeta.ref.urlchar3PBC3PBC name, 3PBCJHHMM.m+DDMM (3PBC_name)meta.id;meta.maincharprimaryXRTXRT candidate counterpart name, SWXRTJHHMMSS.sss+DDMMSS.sss (XRT_detection)meta.id.assoccharXDF[mx] X-ray detection flag (XDF) (1)meta.codecharRAJ2000Centroid right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Centroid declination (J2000)pos.eq.dec;meta.mainePosXRT centroid positional uncertainty (sigma_XRT)arcsecstat.error;posfloatsepXRTBATAngular separation between the XRT centroid (angsep_XRTBAT)arcsecpos.angDistancefloatJ/A+A/692/A147/class*Multiwavelength classification of the ten counterparts with available spectra in the SDSSrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint3PBC3PBC name (3PBC_name)meta.id;meta.maincharSDSSSDSS name (SDSS_name)meta.idcharz? Redshiftsrc.redshiftdoublenullableClassClassification based on the spectral characteristics (Class)meta.code.class;src.classchar