J/ApJ/886/20ivo://CDS.VizieR/J/ApJ/886/20doi:10.26093/cds/vizier.18860020CDSYu H.-F.Dereli-Begue H.Ryde F.2021-07-05T11:36:52Z2021-04-29T12:59:55ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsWe performed time-resolved spectroscopy on a sample of 38 single pulses from 37 gamma-ray bursts detected by the Fermi/Gamma-ray Burst Monitor during the first 9yr of its mission. For the first time a fully Bayesian approach is applied. A total of 577 spectra are obtained and their properties studied using two empirical photon models, namely the cutoff power law (CPL) and Band model. We present the obtained parameter distributions, spectral evolution properties, and parameter relations. We also provide the result files containing this information for usage in further studies. It is found that the CPL model is the preferred model, based on the deviance information criterion and the fact that it consistently provides constrained posterior density maps. In contrast to previous works, the high-energy power-law index of the Band model, {beta}, has in general a lower value for the single pulses in this work. In particular, we investigate the individual spectrum in each pulse, that has the largest value of the low-energy spectral indexes, {alpha}. For these 38 spectra, we find that 60% of the {alpha} values are larger than -2/3, and thus incompatible with synchrotron emission. Finally, we find that the parameter relations show a variety of behaviors. Most noteworthy is the fact that the relation between {alpha} and the energy flux is similar for most of the pulses, independent of any evolution of the other parameters.2019ApJ...886...20Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/886/20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/166/298 : Spectral cat. of bright BATSE gamma-ray bursts (Kaneko+, 2006)J/ApJ/756/112 : Fermi/GBM GRB time-resolved spectral analysis (Lu+, 2012)J/ApJS/216/32 : Localizations of GRBs with Fermi GBM (Connaughton+, 2015)J/A+A/588/A135 : Fermi/GBM GRB time-resolved spectral catalog (Yu+, 2016)J/ApJS/223/28 : The third Fermi/GBM GRB catalog (6yr) (Bhat+, 2016)J/ApJ/893/46 : The fourth Fermi-GBM GRB catalog: 10yrs (von Kienlin+, 2020)http://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html : Fermi GBM bursthttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/886/20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/886/20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/886/20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/886/20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/886/20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/886/20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/886/20/table1 (GRB, detectors, source and background intervals used in the analysis)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/886/20/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/886/20/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/886/20/table1?GETtext/xml+votable180.050000true250.518.40.0055555555555555566/6992 7176 7750 9409 9662 10565 11563 12170 13191 16884 17269 18133 18704 18783 18784 19097 21059 21461 21665 21756 22838 23423 24378 24570 29811 32419 34952 36444 38362 39682 40839 41542 43316 45373 46319 46710 46829https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/886/20?format=asciiGamma-raydefaultJ/ApJ/886/20/table1GRB, detectors, source and background intervals used in the analysisrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFermi[81009140/170114917] GRB identifier (<Fermi bnYYMMDDddd> in Simbad)meta.id;meta.mainlongprimaryDetDetectors (1)meta.id;instrcharb_delTs[-5/160] Source lower range {Delta}T_src_stime.intervalintB_delTs[9/200] Source upper range {Delta}T_src_stime.intervalintb_delTb1[-40/100] First background lower range {Delta}T_bkg,1_stime.intervalintB_delTb1[-15/150] First background upper range {Delta}T_bkg,1_stime.intervalintb_delTb2[0/250]? Second background lower range {Delta}T_bkg,2_stime.intervalintnullableB_delTb2[30/300]? Second background upper range {Delta}T_bkg,2_stime.intervalintnullableb_delTb3[0/60]? Third background lower range {Delta}T_bkg,3_stime.intervalintnullableB_delTb3[80/80]? Third background upper range {Delta}T_bkg,3_stime.intervalintnullableN[8/30] The number of time bins using Bayesian blocks across the source intervalmeta.numberintNs[5/19] The number of time bins with statistical significance of at least 20meta.numberinta-Ep{alpha}-E_p_ type (2)src.classcharr(a-Ep)[-0.86/0.93] Spearman's rank coefficient for {alpha}-E_p_stat.correlationfloatF-Ep[1/3] F-E_p_ type (2)src.classintr(F-Ep)[-0.83/0.95] Spearman's rank coefficient for F-E_p_stat.correlationfloatF-a[1/3] F-{alpha} type (2)src.classintr(F-a)[-0.71/0.98] Spearman's rank coefficient for F-{alpha}stat.correlationfloatEvolEvolutionary trend of the peak energy (3)meta.notecharNspNumber of spectral measurements for this GRB (link to Table 3)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/ApJ/886/20/table3Time-resolved spectral analysis resultsEp[-4024/57237] Derived CPL peak energykeVem.energydoubleE_Ep[0.04/17645] Upper uncertainty in EpkeVstat.error;stat.maxdoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFermiGRB identifiermeta.id;meta.mainlongm_FermiPulse identifiermeta.code.multipchartStart[-5/194] Start time of Bayesian block time binstime.epochfloattStop[-4/200] Stop time of Bayesian block time binstime.epochfloatS[-4.4/197] Significance of the binstat.fit.goodnessfloatK[0.009/737] Best-fit CPL normalization parameterph.s**-1.cm**-2.keV**-1stat.fit.paramdoubleE_K[0.0002/427] Upper uncertainty in Kph.s**-1.cm**-2.keV**-1stat.error;stat.maxdoublee_K[0.007/401] Lower uncertainty in Kph.s**-1.cm**-2.keV**-1stat.errordoublealpha[-2.9/0.5] Best-fit CPL low-energy power-law indexspect.indexfloatE_alpha[0/0.7] Uncertainty in alphastat.error;stat.maxfloate_alpha[0.02/1.1] Uncertainty in alphastat.error;pos.eq.rafloatEc[14/44331] Best-fit CPL cutoff energykeVem.energydoubleE_Ec[0.8/13666] Upper uncertainty in EckeVstat.error;stat.maxdoublee_Ec[2.1/35094] Lower uncertainty in EckeVstat.errordoublee_Ep[0.2/45310] Lower uncertainty in EpkeVstat.errordoubleF[1e-9/2.6e-5] Derived CPL energy flux; erg/s/cm^2^mW.m**-2phot.fluxdoubleE_F[1e-8/0.00011] Upper uncertainty in FmW.m**-2stat.error;stat.maxdoublee_F[1e-9/1.3e-5] Lower uncertainty in FmW.m**-2stat.errordoubleK-B[0.0008/405] Best-fit BAND normalization parameterph.s**-1.cm**-2.keV**-1stat.fit.paramdoubleE_K-B[2e-5/154] Upper uncertainty in K-Bph.s**-1.cm**-2.keV**-1stat.error;stat.maxdoublee_K-B[0.0005/402] Lower uncertainty in K-Bph.s**-1.cm**-2.keV**-1stat.error;stat.mindoublealpha-B[-1.8/2.5] Best-fit BAND low-energy power-law indexspect.indexfloatE_alpha-B[0.01/3.3] Upper uncertainty in alpha-Bstat.error;stat.maxfloate_alpha-B[0/3.1] Lower uncertainty in alpha-Bstat.errorfloatBeta-B[-4.7/-1.6] Best-fit BAND high-energy power-law indexspect.indexfloatE_Beta-B[0.03/1.7] Upper uncertainty in Beta-Bstat.error;stat.maxfloate_Beta-B[0/1.7] Lower uncertainty in Beta-Bstat.errorfloatEp-B[10.4/8499] Derived BAND peak energykeVem.energyfloatE_Ep-B[0.08/2007] Upper uncertainty in Ep-BkeVstat.error;stat.maxfloate_Ep-B[0.4/4879] Lower uncertainty in Ep-BkeVstat.errorfloatF-B[4.2e-9/0.96]? Derived BAND energy flux; erg/s/cm^2^ (1)mW.m**-2phot.fluxdoublenullableE_F-B[6.2e-8/87]? Upper uncertainty in F-B (1)mW.m**-2stat.error;stat.maxdoublenullablee_F-B[9.4e-10/8.5e-6]? Lower uncertainty in F-B (1)mW.m**-2stat.errordoublenullableDeltaDIC[-145665983/3843] Difference in deviance information criterion between CPL and BANDarith.diffdoublePDIC[-1123/3] Effective number of CPL parametersmeta.numberdoublePDIC-B[-145665980/4] Effective number of BAND parametersmeta.numberdouble