J/ApJ/928/152ivo://CDS.VizieR/J/ApJ/928/152doi:10.26093/cds/vizier.19280152CDSLi L.Mao J.2024-11-06T20:24:20Z2024-04-05T10:52:52ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsredshiftedphotometryWe select 52 long gamma-ray bursts (GRBs) that have precursor activity in the third Swift-BAT catalog. Each episode shown in both the precursors and the main bursts is fitted by the Norris function. We systematically analyze the temporal properties for both the precursors and the main bursts. We do not find any significant difference between the temporal profile of the precursor and that of the main burst. The photon count of the precursor is related to that of the main burst. It is indicated that the precursor and the main burst might have the same physical origin, as the precursor and the main burst follow the same {tau}p-{omega} relation. However, we do not find the explicit relation between the energy release of the precursor and the quiescent time. Some theoretical models, such as the fallback collapsar scenario and the jet-cocoon scenario, may be helpful to explain the GRB-precursor phenomena.2022ApJ...928..152Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/928/152CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/175/179 : The BAT1 gamma-ray burst catalog (Sakamoto+, 2008)J/MNRAS/448/2624 : List of isolated emission episodes in GRB (Charisi+, 2015)J/ApJ/829/7 : 3rd Swift/BAT GRB catalog (past ~11yrs) (BAT3) (Lien+, 2016)J/ApJ/866/97 : Swift X-ray flash & rich GRBs in BAT3 (Bi+, 2018)J/ApJ/862/155 : Two-episode prompt emission of GRB with Fermi (Lan+, 2018)J/ApJ/884/59 : GRB X-ray flare temporal & spectral properties (Liu+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/928/152https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/928/152http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/928/152https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/928/152https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/928/152http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/928/152GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/928/152/table3 (The quiescent time and the peak time)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/928/152/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/928/152/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/928/152/table3?GETtext/xml+votable180.050000true306.475417-42.6006080.0055555555555555566/140 207 314 500 646 2336 4449 4485 5726 5840 6521 7589 9321 9643 9897 10704 12006 13312 13694 15530 16991 17561 18494 18945 18978 20710 22129 25131 25946 26011 27284 27566 28032 29731 31494 31607 33004 33735 34435 34440 36374 36468 37383 38926 39076 40433 42901 43920 44436 45008 47148 47459https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/928/152?format=asciiGamma-raydefaultJ/ApJ/928/152/table3The quiescent time and the peak timerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGRB name (YYMMDDA)meta.id;meta.maincharprimaryTypeGRB type (1)meta.code.classcharz[0.5/6.4] Redshiftsrc.redshiftfloatFig[1/52] Figure subset number in Figure 18; column added by CDSmeta.bib.figintT90[7/810.5] Duration T_90_stime.durationfloatdelTq1[2.8/527] Quiescent time, {Delta}t_q,1_stime;arith.difffloatSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchardelTq2[5.8/101]? Quiescent time, {Delta}t_q,2_stime;arith.difffloatnullabledelTq3[41.6]? Quiescent time, {Delta}t_q,3_stime;arith.difffloatnullabledelTp1[7.8/636] Time between the peak time of one pulse to the peak time of the subsequent pulse, {Delta}t_p,1_stime;arith.difffloatdelTp2[12.8/140]? Time between the peak time of one pulse to the peak time of the subsequent pulse, {Delta}t_p,2_stime;arith.difffloatnullabledelTp3[58.16]? Time between the peak time of one pulse to the peak time of the subsequent pulse, {Delta}t_p,3_stime;arith.difffloatnullableNfNumber of fitting parameters of the GRB episodes (link to Table 1)meta.numberintnullable_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/928/152/table1The fitting parameters of the GRB episodesu_z[?] Uncertainty flag on zmeta.code.error;src.redshiftcharGRBGRB name (YYMMDDA)meta.id;meta.maincharTypeGRB typemeta.code.classcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintl_zLimit flag on z (1)meta.code.error;src.redshiftcharz[0.54/6.32] Redshift (1)src.redshiftfloatT90[7/810.5] Swift/BAT catalog T_90_ durationstime.intervalfloatPeakPulse type (2)meta.codecharA[0.02/4.6] Maximum intensity in units of counts/s/Detectorphot.count;em.gamma.hardfloate_A[0/0.15] The 1{sigma} uncertainty in Astat.errorfloatts[-233/644] Start timestime.epochfloate_ts[0.02/17.2] The 1{sigma} uncertainty in tssstat.errorfloattau1[0.02/648] The {tau}_1_ parametersstat.fit.paramfloate_tau1[0.02/64] The 1{sigma} uncertainty in tau1sstat.errorfloattau2[0.3/36.1] The {tau}_2_ parametersstat.fit.paramfloate_tau2[0.01/7] The 1{sigma} uncertainty in tau2sstat.errorfloattp[0.18/46] Peak timestime.epochfloate_tp[0.02/15] The 1{sigma} uncertainty in tpsstat.errorfloatomega[0.8/49] Pulse widthstime.intervalfloate_omega[0.05/25] The 1{sigma} uncertainty in omegasstat.errorfloatkappa[0.1/1] Pulse asymmetrystat.fit.paramfloate_kappa[0/0.5] The 1{sigma} uncertainty in kappastat.errorfloattaur[0.16/17.5] Rise timestime.epochfloate_taur[0.01/7] The 1{sigma} uncertainty in taursstat.errorfloattaud[0.58/39] Decline timestime.intervalfloate_taud[0.03/12.1] The 1{sigma} uncertainty in taudsstat.errorfloatRefReference of previous GRB precursor identifier (3)pos.framechar