J/ApJS/180/102ivo://CDS.VizieR/J/ApJS/180/102doi:10.26093/cds/vizier.21800102CDSLaird E.S.Nandra K.Georgakakis A.Aird J.A.Barmby P.,Conselice C.J.Coil A.L.Davis M.Faber S.M.Fazio G.G.,Guhathakurta P.Koo D.C.Sarajedini V.Willmer C.N.A.2009-11-17T17:00:31Z2009-11-17T17:52:32ZCDS support team

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

cds-question@unistra.frx-ray-sourcessurveysastronomical-object-identificationphotometryWe present the EGIS-X survey, a series of deep Chandra ACIS-I observations of the Extended Groth Strip. The survey comprises pointings at eight separate positions, each with nominal exposure of 200ks, covering a total area of approximately 0.67deg^2^ in a strip of length 2 degrees. We describe in detail an updated version of our data reduction and point-source-detection algorithms used to analyze these data. A total of 1325 band-merged sources have been found to a Poisson probability limit of 4x10^-6^, with limiting fluxes of 5.3x10^-21^W/m2 in the soft (0.5-2keV) band and 3.8x10^-19^W/m2 in the hard (2-10keV) band. We present simulations verifying the validity of our source-detection procedure and showing a very small, <1.5%, contamination rate from spurious sources. Optical/NIR counterparts have been identified from the DEEP2, CFHTLS, and Spitzer/Infrared Array Camera (IRAC) surveys of the same region. Using a likelihood ratio method, we find optical counterparts for 76% of our sources, complete to R_AB_=24.1, and, of the 66% of the sources that have IRAC coverage, 94% have a counterpart to a limit of 0.9uJy at 3.6um (m_AB_=23.8). After accounting for (small) positional offsets in the eight Chandra fields, the astrometric accuracy of Chandra positions is found to be 0"8rms; however, this number depends both on the off-axis angle and the number of detected counts for a given source. All data products described in this paper are made available via a public Web site.2009ApJS..180..102Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/180/102CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-)J/ApJS/177/431 : Mid-IR sources in EGS (Barmby+, 2008)J/ApJ/642/126 : Mid-IR observations in the extended Groth stripJ/AJ/132/2159 : IRAC counterparts of 6cm galaxies in EGS (Willner+, 2006)J/ApJ/625/6 : Galaxy groups in the DEEP2 Galaxy Redshift SurveyJ/MNRAS/356/568 : Deep Chandra survey of the Groth Strip (Nandra+, 2005)J/MNRAS/371/221 : Deep Chandra survey of the Groth Strip. II.http://terapix.iap.fr/rubrique.php?id_rubrique=169 : CFHTLS data releaseshttp://deep.berkeley.edu/ : DEEP2 redshift survey Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/180/102https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/180/102http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/180/102https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/180/102https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/180/102http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/180/102GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/180/102/aegis (Chandra AEGIS-X source catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/180/102/aegis?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/180/102/aegis?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/180/102/aegis?GETtext/xml+votable180.050000true213.5452938952.084321110.0055555555555555566/11424 11425 11426 11428https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/180/102?format=asciiX-rayOpticaldefaultJ/ApJS/180/102/aegisChandra AEGIS-X source catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintegs[1,1325] Source ID (G1)meta.id;meta.mainintFieldField ID identifying individual field in which the source was detectedmeta.id;obs.fieldcharCXOEGSCXO Object name (JHHMMSS.s+DDMMSS)meta.idchare_PosPositional errorarcsecstat.errorfloatOAAOff-axis anglearcmininstr.offsetfloatFctsFull (0.5-7keV) band, total countsctphot.count;em.X-rayintFbkgFull (0.5-7keV) band, background ctsctinstr.backgroundfloatSctsSoft (0.5-2keV) band, total countsctphot.count;em.X-rayintSbkgSoft (0.5-2keV) band, background ctsctinstr.backgroundfloatHctsHard (2-7keV) band, total countsctphot.count;em.X-rayintHbkgHard (2-7keV) band, background ctsctinstr.background;em.X-ray.mediumfloatUctsUltra hard (4-7keV) band, total countsctphot.count;em.X-rayintUbkgUltra hard (4-7keV) band, background ctsctinstr.background;em.X-ray.mediumfloatBandBand(s) in which source is detected (1)instr.bandpasscharbadProbLowest false detection probability found for the four bandsstat.probabilitydoublen_egs[a] Note about Bayesian fluxes (1)meta.notecharl_FBayLimit flag on FBBaymeta.code.errorcharFBayBayesian method full band (0.5-10keV) fluxaW.m**-2phot.flux;em.X-rayfloatE_FBay? Upper 1{sigma} error in FBBayaW.m**-2stat.error;stat.maxfloatnullablee_FBay? Lower 1{sigma} error in FBBayaW.m**-2stat.errorfloatnullablel_SBayLimit flag on SBBaymeta.code.errorcharSBayBayesian method soft band (0.5-2keV) fluxaW.m**-2phot.flux;em.X-rayfloatE_SBay? Upper 1{sigma} error in SBBayaW.m**-2stat.error;stat.maxfloatnullablee_SBay? Lower 1{sigma} error in SBBayaW.m**-2stat.errorfloatnullablel_HBayLimit flag on HBBaymeta.code.errorcharHBayBayesian method hard band (2-10keV) fluxaW.m**-2phot.flux;em.X-rayfloatE_HBay? Upper 1{sigma} error in HBBayaW.m**-2stat.error;stat.maxfloatnullablee_HBay? Lower 1{sigma} error in HBBayaW.m**-2stat.errorfloatnullablel_UBayLimit flag on UBBaymeta.code.errorcharUBayBayesian method ultra hard band (5-10keV) fluxaW.m**-2phot.flux;em.X-rayfloatE_UBay? Upper 1{sigma} error in UBBayaW.m**-2stat.error;stat.maxfloatnullablee_UBay? Lower 1{sigma} error in UBBayaW.m**-2stat.errorfloatnullablel_FclasLimit flag on FBclasmeta.code.errorcharFclasClassical method full band (0.5-10keV) flux (2)aW.m**-2phot.flux;em.X-rayfloatE_Fclas? Upper 1{sigma} error in FBclas (2)aW.m**-2stat.error;stat.maxfloatnullablee_Fclas? Lower 1{sigma} error in FBclasaW.m**-2stat.errorfloatnullablel_SclasLimit flag on SBclasmeta.code.errorcharSclasClassical method soft band (0.5-2keV) flux (2)aW.m**-2phot.flux;em.X-rayfloatE_Sclas? Upper 1{sigma} error in SBclas (2)aW.m**-2stat.error;stat.maxfloatnullablee_Sclas? Lower 1{sigma} error in SBclasaW.m**-2stat.errorfloatnullablel_HclasLimit flag on HBclasmeta.code.errorcharHclasClassical method hard band (2-10keV) flux (2)aW.m**-2phot.flux;em.X-rayfloatE_Hclas? Upper 1{sigma} error in HBclas (2)aW.m**-2stat.error;stat.maxfloatnullablee_Hclas? Lower 1{sigma} error in HBclasaW.m**-2stat.errorfloatnullablel_UclasLimit flag on UBclasmeta.code.errorcharUclasClassical method ultra hard band (5-10keV) fluxaW.m**-2phot.flux;em.X-rayfloatE_Uclas? Upper 1{sigma} error in UBclas (2)aW.m**-2stat.error;stat.maxfloatnullablee_Uclas? Lower 1{sigma} error in UBclasaW.m**-2stat.errorfloatnullableHRbHardness ratio (HR) using Bayesian methodphot.flux;arith.ratiofloatE_HRbUpper 1{sigma} error in HR-Baystat.error;stat.maxfloate_HRbLower 1{sigma} error in HR-Baystat.errorfloatHRc? Hardness ratio using classical methodphot.flux;arith.ratiofloatnullableQ[0/2] Photometry quality flag (3)meta.code.qual;photintf_egs? [ab] Flag for source matching details (1)meta.codecharl_Rmag? Limit flag on Rmagmeta.code.errorcharRmag? DEEP2 R-band AB magnitudemagphot.mag;em.opt.RfloatnullableDEEP2-X? DEEP2 optical and X-ray position offsetarcsecpos;arith.difffloatnullableLR-DEEP2? Likelihood ratio for DEEP2 counterpartstat.likelihood;arith.ratiofloatnullableDEEP2-ID? DEEP2 source ID, (2)meta.id.crossnullablel_imag? Limit flag on i' magmeta.code.errorcharimag? CFHTLS i'-band AB magnitudemagphot.mag;em.opt.IfloatnullableCFHT-X? CFHTLS optical and X-ray position offsetarcsecpos;arith.difffloatnullableLR-CFHT? Likelihood ratio for CFHTLS counterpartstat.likelihood;arith.ratiofloatnullableCFHT-ID? CFHTLS source ID (3)meta.id.crosscharl_3.6mag? Limit flag on IRAC 3.6micron magmeta.code.errorchar3.6mag? IRAC 3.6micron AB magnitudemagphot.mag;em.IR.3-4umfloatnullableIRAC-X? IRAC 3.6micron and X-ray position offsetarcsecpos;arith.difffloatnullableLR-IRAC? Likelihood ratio for IRAC 3.6micron counterpartstat.likelihood;arith.ratiofloatnullableEGSIRAC? IRAC 3.6micron source ID (JHHMMSS.ss+DDMMSS.s) (4)meta.id.crosscharRAJ2000X-ray Right Ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000X-ray Declination in decimal degrees (J2000)degpos.eq.dec;meta.main