J/AJ/122/2810ivo://CDS.VizieR/J/AJ/122/2810doi:10.26093/cds/vizier.51222810CDSBrandt W.N.Alexander D.M.Hornschemeier A.E.Garmire G.P.,Schneider D.P.Barger A.J.Bauer F.E.Broos P.S.Cowie L.L.,Townsley L.K.Burrows D.N.Chartas G.Feigelson E.D.Griffiths R.E.,Nousek J.A.Sargent W.L.W.2023-04-06T16:50:45Z2002-07-20T18:41:18ZCDS support team

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

cds-question@unistra.frsurveysx-ray-sourcesAn extremely deep X-ray survey (~1Ms) of the Hubble Deep Field North (HDF-N) and its environs (~450arcmin^2^) has been performed with the Advanced CCD Imaging Spectrometer (ACIS) on board the Chandra X-Ray Observatory. This is one of the two deepest X-ray surveys ever performed; for point sources near the aim point, it reaches 0.5-2.0 and 2-8keV flux limits of ~3x10^-17^ and ~2x10^-16^ergs/cm^2^/s, respectively. Here we provide source catalogs, along with details of the observations, data reduction, and technical analysis. Observing conditions, such as background, were excellent for almost all of the exposure. We have detected 370 distinct point sources: 360 in the 0.5-8.0keV band, 325 in the 0.5-2.0keV band, 265 in the 2-8keV band, and 145 in the 4-8keV band. Two new Chandra sources in the HDF-N itself are reported and discussed. Source positions are accurate to within 0.6"-1.7" (at ~90% confidence), depending mainly on the off-axis angle. We also detect two highly significant extended X-ray sources and several other likely extended X-ray sources. We present basic number count results for sources located near the center of the field. Source densities of 7100^+1100^_-940_deg^-2^ (at 4.2x10^-17^ergs/cm^2^/s) and 4200^+670^_580_deg^-2^ (at 3.8x10^-16^ergs/cm^2^/s) are observed in the soft and hard bands, respectively.2001AJ....122.2810Bhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/122/2810CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/124/2351 : Chandra Deep Field North survey. XII (Bauer+, 2002)J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/122/2810https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/122/2810http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/122/2810https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/122/2810https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/122/2810http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/122/2810GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/122/2810/table3 (Main Chandra Point-Source Catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2810/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2810/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2810/table3?GETtext/xml+votable180.050000true188.81387562.235250.005555555555555556Cone search capability for table J/AJ/122/2810/table6 (Supplementary Chandra point-source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/122/2810/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/122/2810/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/122/2810/table6?GETtext/xml+votable180.050000true188.8272562.26488890.005555555555555556Chandra6/11230 11252https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/122/2810?format=asciiX-raydefaultJ/AJ/122/2810/table3Main Chandra Point-Source CatalogNoteSource notes (7)meta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSource number (1-370, S1-S11) (1)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPosErrPositional errorarcsecstat.errorfloatl_FcntLimit flag on Fcntmeta.code.errorcharFcntFull band counts (2)ctphot.count;em.X-rayfloate_Fcnt? The 1{sigma} statistical error in Fcntctstat.errorfloatnullablef_Fcnt[abc ] Flag on Fcnt3)meta.code.errorcharl_ScntLimit flag on Scntmeta.code.errorcharScntSoft band (0.5-2keV ) counts (2)ctphot.count;em.X-rayfloate_Scnt? The 1{sigma} statistical error in Scntctstat.errorfloatnullablef_Scnt[abc ] Flag on Scnt (3)meta.code.errorcharl_HcntLimit flag on Hcntmeta.code.errorcharHcntHard band (2-8keV) counts (2)ctphot.count;em.X-rayfloate_Hcnt? The 1{sigma} statistical error in Hcntctstat.errorfloatnullablef_Hcnt[abc ] Flag on Hcnt (3)meta.code.errorcharl_UHcntLimit flag on UHcntmeta.code.errorcharUHcntUltrahard band (4-8keV) counts (2)ctphot.count;em.X-rayfloate_UHcnt? The 1{sigma} statistical error in UHcntctstat.errorfloatnullablef_UHcnt[abc ] Flag on UHcnt (3)meta.code.errorcharl_HRLimit flag on HRmeta.code.errorcharHR? Hardness band ratio (4)phot.flux;arith.ratiofloatnullableE_HR? Upper limit error on HRstat.errorfloatnullablee_HR? Lower limit error on HRstat.errorfloatnullablel_Sp+IndexLimit flag on Sp+Indexmeta.code.errorcharSp+IndexEffective photon index (5)spect.indexfloatf_Sp+Index[d] Indicates Sp+Index set to given value due to low number of countsmeta.code.errorcharExpTimeEffective exposure timekstime.duration;obs.exposurefloatl_FFBLimit flag on FFBmeta.code.errorcharFFBFull band (0.5-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FSBLimit flag on FSBmeta.code.errorcharFSBSoft band (0.5-2keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FHBLimit flag on FHBmeta.code.errorcharFHBHard band (2-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FUHBLimit flag on FUHBmeta.code.errorcharFUHBUltrahard band (4-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatJ/AJ/122/2810/table6Supplementary Chandra point-source catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSource number (1-370, S1-S11) (1)meta.idcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainPosErrPositional errorarcsecstat.errorfloatl_FcntLimit flag on Fcntmeta.code.errorcharFcntFull band counts (2)ctphot.count;em.X-rayfloate_Fcnt? The 1{sigma} statistical error in Fcntctstat.errorfloatnullablef_Fcnt[abc ] Flag on Fcnt3)meta.code.errorcharl_ScntLimit flag on Scntmeta.code.errorcharScntSoft band (0.5-2keV ) counts (2)ctphot.count;em.X-rayfloate_Scnt? The 1{sigma} statistical error in Scntctstat.errorfloatnullablef_Scnt[abc ] Flag on Scnt (3)meta.code.errorcharl_HcntLimit flag on Hcntmeta.code.errorcharHcntHard band (2-8keV) counts (2)ctphot.count;em.X-rayfloate_Hcnt? The 1{sigma} statistical error in Hcntctstat.errorfloatnullablef_Hcnt[abc ] Flag on Hcnt (3)meta.code.errorcharl_UHcntLimit flag on UHcntmeta.code.errorcharUHcntUltrahard band (4-8keV) counts (2)ctphot.count;em.X-rayfloate_UHcnt? The 1{sigma} statistical error in UHcntctstat.errorfloatnullablef_UHcnt[abc ] Flag on UHcnt (3)meta.code.errorcharl_HRLimit flag on HRmeta.code.errorcharHR? Hardness band ratio (4)phot.flux;arith.ratiofloatnullableE_HR? Upper limit error on HRstat.errorfloatnullablee_HR? Lower limit error on HRstat.errorfloatnullablel_Sp+IndexLimit flag on Sp+Indexmeta.code.errorcharSp+IndexEffective photon index (5)spect.indexfloatf_Sp+Index[d] Indicates Sp+Index set to given value due to low number of countsmeta.code.errorcharExpTimeEffective exposure timekstime.duration;obs.exposurefloatl_FFBLimit flag on FFBmeta.code.errorcharFFBFull band (0.5-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FSBLimit flag on FSBmeta.code.errorcharFSBSoft band (0.5-2keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FHBLimit flag on FHBmeta.code.errorcharFHBHard band (2-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatl_FUHBLimit flag on FUHBmeta.code.errorcharFUHBUltrahard band (4-8keV) observed-frame flux in units of 10^-15^ erg/cm^2^/s (6)1e-18W.m**-2phot.fluxfloatNoteSource notes (7)meta.notechar