J/A+A/690/A261ivo://CDS.VizieR/J/A+A/690/A261doi:10.26093/cds/vizier.36900261CDSGuidorzi C.Maccary R.Tsvetkova A.Kobayashi S.Amati L.Bazzanini L.,Bulla M.Camisasca A. E.Ferro L.Frederiks D.Frontera F.Lysenko A.,Maistrello M.Ridnaia A.Svinkin D.Ulanov M.2025-02-24T20:02:05Z2024-10-15T11:04:37ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsAt the dawn of the gamma-ray burst (GRB) afterglow era, a Cepheid-like correlation was discovered between the time variability V and the isotropic-equivalent peak luminosity Liso of the prompt emission of about a dozen long GRBs with measured redshift available at that time. Soon afterwards, the correlation was confirmed in a sample of about 30 GRBs, even though it was affected by significant scatter. Unlike the minimum variability timescale (MVT), V measures the relative power of short-to-intermediate timescales. We aim to test the correlation using about 200 long GRBs with spectroscopically measured redshift, detected by Swift, Fermi, and Konus/WIND, for which both observables can be accurately estimated. The variability for all selected GRBs was calculated according to the original definition using the 64 ms background subtracted light curves of Swift/BAT (Fermi/GBM) in the 15-150 (8-900)keV energy passband. Peak luminosities were either taken from the literature or derived from modelling broad-band spectra acquired with either Konus/WIND or Fermi/GBM. The statistical significance of the correlation has weakened to <~2%, mostly due to the appearance of a number of smooth and luminous GRBs that are characterised by a relatively small V. At odds with most long GRBs, three out of four long-duration merger candidates have high V and low L_iso_. The luminosity is more tightly connected with shortest timescales measured by MVT than the short to intermediate timescales measured by V.We discuss the implications for internal dissipation models and the role of the e photosphere.We identified a few smooth GRBs with a single broad pulse and low V that might have an external shock origin, in contrast with most GRBs. The combination of high variability (V>~0.1), low luminosity L_iso_<~10^51^erg/s, and short MVT (<~0.1s) could be a good indicator for a compact binary merger origin.2024A&A...690A.261Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/690/A261CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/690/A261https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/690/A261http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/690/A261https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/690/A261https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/690/A261http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/690/A261GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/690/A261/table1 (Variability-Luminosity of 216 GRBs (f=0.8))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A261/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A261/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A261/table1?GETtext/xml+votable180.050000true166.4124583-40.68416670.005555555555555556Cone search capability for table J/A+A/690/A261/table3 (Variability-Luminosity of 188 GRBs (f=0.45))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/690/A261/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/690/A261/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/690/A261/table3?GETtext/xml+votable180.050000true166.4124583-40.68416670.0055555555555555566/207 228 500 744 962 2044 2315 2336 2682 2948 3089 3111 3586 3839 3923 3935 4060 4449-4450 5051 5073 5135 5389 5625 5790 5840 5941 6261 6445 6521 6523 7182 7227 7518 7532 7589 7750 8074 8182 8345 8569 8798 8955 9022 9370 9431 9512 9662 9989 10094 10424 10447 10519 10602 11058 11220 11308 11657 11695 11748 11799 11822 12134 12230 12588 13182 13252 13312 13694 13779 13828 14259 14948 15189 15233 15340 15530 16057 16282 16661 17071 17316 17395 17411 17703 17733 17749 17814 18728 18777 19082 19097 19164 19334 19544 19731 19785 19890 20030 20191 20349 20372 20420 20460 20679 20774 21284 21595 22129 22392 22590 22793 24097 24902 25174 25192 26365 26441 27064 27284 27434 27541 27810 27933 27961-27962 27965 28496 28555 28930 29731 29816 30170 30557 31120 31185 31281 31494 31675 31700 31721 32646 32686 32713 32889 33004 33146 33278 33444 33525 33735 33751 33813 33832 33860 34174 34364 34440 34465 34605 34699 34832 35330 35392 35566 35633 35844 36107 36460 36800 37391 37505 38301 38351 38688 39553 39594 40249 40273 40433 40778 41020 42133 42545 42901 43835 44223 44436 44715 44857 45008 45510 45828 45835-45836 45938 46022 46150 46180 46212 46218 46250 46594 46899 47148 47162 47459 47588 48054 48189 48219 48447 48458 49004https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/690/A261?format=asciiGamma-raydefaultJ/A+A/690/A261/table1Variability-Luminosity of 216 GRBs (f=0.8)Vf05[] Negative error corresponding to 5 percentile of Vf confidence intervalstat.errorfloatVf95Positive error corresponding to 95 percentile of Vf confidence intervalstat.errorfloatlogLisologarithm of Liso expressed in erg/s (isotropic-equivalent peak luminosity)log(1e-07W)phys.luminosity;em.gammafloate_logLisoError on logLiso (1-sigma)log(1e-07W)stat.errorfloatDetDetector used to calculate Vfinstr.setup;instr.detcharr_logLisoReference for logLiso, in refs.dat filemeta.ref;pos.frameintNpeaksNumber of peaks (3)meta.numberint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGRB namemeta.id;meta.maincharzRedshiftsrc.redshiftdoubleTfDuraton of the time interval collecting a fraction f of total net countsstime.agefloate_TfError of Tf (1-sigma) (1)sstat.errorfloatVfVariability assuming f (1)stat.fit.paramfloats_VfError of Vf (1-sigma)stat.errorfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/690/A261/table3Variability-Luminosity of 188 GRBs (f=0.45)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGRB namemeta.id;meta.maincharzRedshiftsrc.redshiftdoubleTfDuraton of the time interval collecting a fraction f of total net countsstime.agefloate_TfError of Tf (1-sigma) (1)sstat.errorfloatVfVariability assuming f (1)stat.fit.paramfloats_VfError of Vf (1-sigma)stat.errorfloatVf05[] Negative error corresponding to 5 percentile of Vf confidence intervalstat.errorfloatVf95Positive error corresponding to 95 percentile of Vf confidence intervalstat.errorfloatlogLisologarithm of Liso expressed in erg/s (isotropic-equivalent peak luminosity)log(1e-07W)phys.luminosity;em.gammafloate_logLisoError on logLiso (1-sigma)log(1e-07W)stat.errorfloatDetDetector used to calculate Vfinstr.setup;instr.detcharr_logLisoReference for logLiso, in refs.dat filemeta.ref;pos.frameintNpeaksNumber of peaks (3)meta.numberint_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.mainnullable_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainnullableSimbadSimbad column added by the CDSmeta.ref.urlcharJ/A+A/690/A261/refsReferencesAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference codemeta.noteintBibCodeBibCodemeta.bib.bibcodechar