J/MNRAS/397/1177ivo://CDS.VizieR/J/MNRAS/397/1177doi:10.26093/cds/vizier.73971177CDSEvans P.A.Beardmore A.P. Page K.L.Osborne J.P.O'BrienP.T.,Willingale R.Starling R.L.CBurrows D.N.Godet O.Vetere L.,Racusin J.Goad M.R.Wiersema K.Angelini L.Capalbi M.Chincarini G.,Gehrels N.Kennea J.A.Margutti R.Morris D.C.Mountford C.J.,Pagani C.Perri M.Romano P.Tanvir N.2024-07-09T20:15:24Z2009-11-05T22:13:09ZCDS support team

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

cds-question@unistra.frx-ray-sourcesgamma-ray-astronomyWe present a homogeneous X-ray analysis of all 318 Gamma Ray Bursts detected by the X-ray Telescope on the Swift satellite up to 2008 July 23; this represents the largest sample of X-ray GRB data published to date. In Sections 2-3 we detail the methods which the Swift-XRT team has developed to produce the enhanced positions, light curves, hardness ratios and spectra presented in this paper. Software using these methods continues to create such products for all new GRBs observed by the Swift-XRT. We also detail web-based tools allowing users to create these products for any object observed by the XRT, not just GRBs. In Sections 4-6 we present the results of our analysis of GRBs, including probability distribution functions of the temporal and spectral properties of the sample. We demonstrate evidence for a consistent underlying behaviour which can produce a range of light curve morphologies, and attempt to interpret this behaviour in the framework of external forward shock emission. We find several difficulties, in particular that reconciliation of our data with the forward shock model requires energy injection to continue for days to weeks.2009MNRAS.397.1177Ehttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/397/1177CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+AS/129/1 : GRANAT/WATCH catalogue of gamma-ray bursts (Sazonov+ 1998)J/A+A/473/347 : BeppoSAX complete catalogue of GRBs (Vetere+, 2007)J/A+A/427/87 : List of GRBs (Gorosabel+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/397/1177https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/397/1177http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/397/1177https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/397/1177https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/397/1177http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/397/1177GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/397/1177/enhpos (Enhanced X-ray positions for 268 GRBs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/397/1177/enhpos?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/397/1177/enhpos?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/397/1177/enhpos?GETtext/xml+votable180.050000true192.8772913.044330.0055555555555555566/186 314 338 393 453 500 503 908 918 923 1507 2044 2315 2357 2538 2925 2938 3405 3536 3551 3589 3700 3706 3832 3894 3927 4323 4485 4788 4955 5080 5618 5633 5726 5745 5941 6004 6102 6258 6404 6862 7044 7156 7184 7518 7685 7747 7908 7980 8375 8641 8761 8798 8954 9069 9100 9330 9370 9395 9682 10094 10135 10447 10519 10666 10680 10836 10852 10912 10914 11307 11379 11640 11649 11673 11905 12020 12134 12597 12848 13312 13558 13694 13701 13898 13924 14272 14781 14852 14892 14977 15054 15246 15292 15348 15505 15513 15595 15683 15702 15874 15995 16072 16078 16165 16172 16232 16489 16493 16546 16991 17279 17384 17453 17561 17721 17733 17814 18097 18264 18494 18681 18910 18978 19102 19164 19168 19194 19293 19731 19865 19890 19911 20030 20053 20263 20360 20401 20655 20753 21082 21439 21498 21688 22129 22422 22590 23138 23585 23680 24036 24105 24424 25248 25293 25394 25529 25901 25946 26085 26441 27566 27841 27906 27911 27933 28063 28497 28578 28630 28831 29563 29612 29884 30461 30568 30678 30692 31185 31281 31385 31607 31667 31700 31934 32110 32239 32676 33004 33323 33482 33617 33679 33735 33845 34435 34440 34465 34499 34605 34949 35045 35088 35330 35566 36074 36297 36528 37007 37383 37428 37562 37830 37910 38046 38146 38301 38926 39199 39213 39224 39374 39475 39829 39881 40249 40433 40482 40611 40642 41059 41442 41555 41755 41989 42096 42361 42865 42952 43045 43280 43920 44160 44419 44822 44857 44861 45008 45180 45205 45422 45510 45561 45938 46789 47027 47136 47251 47397 47459 47632 47945 48054 48189 48422 48447 48458 49004https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/397/1177?format=asciiGamma-rayX-raydefaultJ/MNRAS/397/1177/enhposEnhanced X-ray positions for 268 GRBsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetIDSwift Target IDmeta.idintGRBGRB Name (YYMMDDA)meta.id;meta.maincharRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.maine_PosPosition uncertainty (radius, 90% confidence)arcsecstat.errorfloatJ/MNRAS/397/1177/lcfitTemporal decay parameters for 295 XRT GRB light curvestbr1? Time of the first break in the decaystime.epochdoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetIDSwift Target IDmeta.idintGRBGRB Name (YYMMDDA)meta.id;meta.maincharFlux11? 0.3-10keV Flux 11 hours after the triggermW.m**-2phot.flux;em.X-raydoublenullableTstartWhen the XRT observations started, seconds since triggerstime.epochdoubleTstopWhen the XRT observations ended, seconds since triggerstime.epochdoubleT90? The duration of the GRB, from the Swift data tablestime.durationfloatnullablealpha1Power-law decay index of the first light curve segmentspect.indexfloatE_alpha1Positive error (90% conf) on alpha1stat.error;stat.maxfloate_alpha1Negative error (90% conf) on alpha1stat.errorfloatE_tbr1? Positive error (90% conf) on tbr1sstat.error;stat.maxdoublenullablee_tbr1? Negative error (90% conf) on tbr1sstat.errordoublenullablealpha2? Power-law decay index of the second light curve segmentspect.indexfloatnullableE_alpha2? Positive error (90% conf) on alpha2stat.error;stat.maxfloatnullablee_alpha2? Negative error (90% conf) on alpha2stat.errorfloatnullabletbr2? Time of the second br in the decaystime.epochdoublenullableE_tbr2? Positive error (90% conf) on tbr2sstat.error;stat.maxdoublenullablee_tbr2? Negative error (90% conf) on tbr2sstat.errordoublenullablealpha3? Power-law decay index of the third light curve segmentspect.indexfloatnullableE_alpha3? Positive error (90% conf) on alpha3stat.error;stat.maxfloatnullablee_alpha3? Negative error (90% conf) on alpha3stat.errorfloatnullabletbr3? Time of the third br in the decaystime.epochdoublenullableE_tbr3? Positive error (90% conf) on tbr3sstat.error;stat.maxdoublenullablee_tbr3? Negative error (90% conf) on tbr3sstat.errordoublenullablealpha4? Power-law decay index of the fourth light curve segmentspect.indexfloatnullableE_alpha4? Positive error (90% conf) on alpha4stat.error;stat.maxfloatnullablee_alpha4? Negative error (90% conf) on alpha4stat.errorfloatnullabletbr4? Time of the fourth br in the decaystime.epochdoublenullableE_tbr4? Positive error (90% conf) on tbr4sstat.error;stat.maxdoublenullablee_tbr4? Negative error (90% conf) on tbr4sstat.errordoublenullablealpha5? Power-law decay index of the fifth light curve segmentspect.indexfloatnullableE_alpha5? Positive error (90% conf) on alpha5stat.error;stat.maxfloatnullablee_alpha5? Negative error (90% conf) on alpha5stat.errorfloatnullabletbr5? Time of the fifth br in the decaystime.epochdoublenullableE_tbr5? Positive error (90% conf) on tbr5sstat.error;stat.maxdoublenullablee_tbr5? Negative error (90% conf) on tbr5sstat.errordoublenullablealpha6? Power-law decay index of the sixth light curve segmentspect.indexfloatnullableE_alpha6? Positive error (90% conf) on alpha6stat.error;stat.maxfloatnullablee_alpha6? Negative error (90% conf) on alpha6stat.errorfloatnullableJ/MNRAS/397/1177/avespecTime-averaged X-ray spectral parameters for 318 GRBsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetIDSwift Target IDmeta.idintGRBGRB Name (YYMMDDA)meta.id;meta.maincharNHGalactic column density, from Kalberla et al. 2005cm**-2phys.columnDensity;pos.galacticdoublez? Redshift, from the GCN circularssrc.redshiftfloatnullableWTNH? Intrinsic column density for the WT mode spectrumcm**-2phys.columnDensitydoublenullableE_WTNH? Positive error on WTNHcm**-2stat.error;stat.maxdoublenullablee_WTNH? Negative error on WTNHcm**-2stat.errordoublenullableWTbeta? Spectral index for the WT mode spectrumspect.indexfloatnullableE_WTbeta? Positive error on WTbetastat.error;stat.maxfloatnullablee_WTbeta? Negative error on WTbetastat.errorfloatnullablePCNH? Intrinsic column density for the PC mode spectrumcm**-2phys.columnDensitydoublenullableE_PCNH? Positive error on PCNHcm**-2stat.error;stat.maxdoublenullablee_PCNH? Negative error on PCNHcm**-2stat.errordoublenullablePCbeta? Spectral index for the PC mode spectrumspect.indexfloatnullableE_PCbeta? Positive error on PCbetastat.error;stat.maxfloatnullablee_PCbeta? Negative error on PCbetastat.errorfloatnullableJ/MNRAS/397/1177/resspecTime resolved spectral parameters for 211 GRBsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTargetIDSwift Target IDmeta.idintGRBGRB Name (YYMMDDA)meta.id;meta.maincharWTNH1? Intrinsic column density for the WT mode spectrum of the first power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH1? Positive error on WTNH1cm**-2stat.error;stat.maxdoublenullablee_WTNH1? Negative error on WTNH1cm**-2stat.errordoublenullableWTbeta1? Spectral index for the WT mode spectrum of the first power-law segment of the light curvespect.indexfloatnullableE_WTbeta1? Positive error on WTbeta1stat.error;stat.maxfloatnullablee_WTbeta1? Negative error on WTbeta1stat.errorfloatnullablee_PCbeta5? Negative error on PCbeta5stat.errorfloatnullablePCNH1? Intrinsic column density for the PC mode spectrum of the first power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH1? Positive error on PCNH1cm**-2stat.error;stat.maxdoublenullablee_PCNH1? Negative error on PCNH1cm**-2stat.errordoublenullablePCbeta1? Spectral index for the PC mode spectrum of the first power-law segment of the light curvespect.indexfloatnullableE_PCbeta1? Positive error on PCbeta1stat.error;stat.maxfloatnullablee_PCbeta1? Negative error on PCbeta1stat.errorfloatnullableWTNH2? Intrinsic column density for the WT mode spectrum of the second power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH2? Positive error on WTNH2cm**-2stat.error;stat.maxdoublenullablee_WTNH2? Negative error on WTNH2cm**-2stat.errordoublenullableWTbeta2? Spectral index for the WT mode spectrum of the second power-law segment of the light curvespect.indexfloatnullableE_WTbeta2? Positive error on WTbeta2stat.error;stat.maxfloatnullablee_WTbeta2? Negative error on WTbeta2stat.errorfloatnullablePCNH2? Intrinsic column density for the PC mode spectrum of the second power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH2? Positive error on PCNH2cm**-2stat.error;stat.maxdoublenullablee_PCNH2? Negative error on PCNH2cm**-2stat.errordoublenullablePCbeta2? Spectral index for the PC mode spectrum of the second power-law segment of the light curvespect.indexfloatnullableE_PCbeta2? Positive error on PCbeta2stat.error;stat.maxfloatnullablee_PCbeta2? Negative error on PCbeta2stat.errorfloatnullableWTNH3? Intrinsic column density for the WT mode spectrum of the third power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH3? Positive error on WTNH3cm**-2stat.error;stat.maxdoublenullablee_WTNH3? Negative error on WTNH3cm**-2stat.errordoublenullableWTbeta3? Spectral index for the WT mode spectrum of the third power-law segment of the light curvespect.indexfloatnullableE_WTbeta3? Positive error on WTbeta3stat.error;stat.maxfloatnullablee_WTbeta3? Negative error on WTbeta3stat.errorfloatnullablePCNH3? Intrinsic column density for the PC mode spectrum of the third power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH3? Positive error on PCNH3cm**-2stat.error;stat.maxdoublenullablee_PCNH3? Negative error on PCNH3cm**-2stat.errordoublenullablePCbeta3? Spectral index for the PC mode spectrum of the third power-law segment of the light curvespect.indexfloatnullableE_PCbeta3? Positive error on PCbeta3stat.error;stat.maxfloatnullablee_PCbeta3? Negative error on PCbeta3stat.errorfloatnullableWTNH4? Intrinsic column density for the WT mode spectrum of the fourth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH4? Positive error on WTNH4cm**-2stat.error;stat.maxdoublenullablee_WTNH4? Negative error on WTNH4cm**-2stat.errordoublenullableWTbeta4? Spectral index for the WT mode spectrum of the fourth power-law segment of the light curvespect.indexfloatnullableE_WTbeta4? Positive error on WTbeta4stat.error;stat.maxfloatnullablee_WTbeta4? Negative error on WTbeta4stat.errorfloatnullablePCNH4? Intrinsic column density for the PC mode spectrum of the fourth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH4? Positive error on PCNH4cm**-2stat.error;stat.maxdoublenullablee_PCNH4? Negative error on PCNH4cm**-2stat.errordoublenullablePCbeta4? Spectral index for the PC mode spectrum of the fourth power-law segment of the light curvespect.indexfloatnullableE_PCbeta4? Positive error on PCbeta4stat.error;stat.maxfloatnullablee_PCbeta4? Negative error on PCbeta4stat.errorfloatnullableWTNH5? Intrinsic column density for the WT mode spectrum of the fifth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH5? Positive error on WTNH5cm**-2stat.error;stat.maxdoublenullablee_WTNH5? Negative error on WTNH5cm**-2stat.errordoublenullableWTbeta5? Spectral index for the WT mode spectrum of the fifth power-law segment of the light curvespect.indexfloatnullableE_WTbeta5? Positive error on WTbeta5stat.error;stat.maxfloatnullablee_WTbeta5? Negative error on WTbeta5stat.errorfloatnullablePCNH5? Intrinsic column density for the PC mode spectrum of the fifth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH5? Positive error on PCNH5cm**-2stat.error;stat.maxdoublenullablee_PCNH5? Negative error on PCNH5cm**-2stat.errordoublenullablePCbeta5? Spectral index for the PC mode spectrum of the fifth power-law segment of the light curvespect.indexfloatnullableE_PCbeta5? Positive error on PCbeta5stat.error;stat.maxfloatnullableWTNH6? Intrinsic column density for the WT mode spectrum of the sixth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_WTNH6? Positive error on WTNH6cm**-2stat.error;stat.maxdoublenullablee_WTNH6? Negative error on WTNH6cm**-2stat.errordoublenullableWTbeta6? Spectral index for the WT mode spectrum of the sixth power-law segment of the light curvespect.indexfloatnullableE_WTbeta6? Positive error on WTbeta6stat.error;stat.maxfloatnullablee_WTbeta6? Negative error on WTbeta6stat.errorfloatnullablePCNH6? Intrinsic column density for the PC mode spectrum of the sixth power-law segment of the light curvecm**-2phys.columnDensitydoublenullableE_PCNH6? Positive error on PCNH6cm**-2stat.error;stat.maxdoublenullablee_PCNH6? Negative error on PCNH6cm**-2stat.errordoublenullablePCbeta6? Spectral index for the PC mode spectrum of the sixth power-law segment of the light curvespect.indexfloatnullableE_PCbeta6? Positive error on PCbeta6stat.error;stat.maxfloatnullablee_PCbeta6? Negative error on PCbeta6stat.errorfloatnullable