J/ApJ/896/L20ivo://CDS.VizieR/J/ApJ/896/L20doi:10.26093/cds/vizier.18969020CDSJespersen C.K.Severin J.B.Steinhardt C.L.Vinther J.Fynbo J.P.U.,Selsing J.Watson D.2022-03-21T07:00:25Z2021-12-02T14:37:35ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsThe duration of a gamma-ray burst (GRB) is a key indicator of its physical origin, with long bursts perhaps associated with the collapse of massive stars and short bursts with mergers of neutron stars. However, there is substantial overlap in the properties of both short and long GRBs and neither duration nor any other parameter so far considered completely separates the two groups. Here we unambiguously classify every GRB using a machine-learning dimensionality reduction algorithm, t-distributed stochastic neighborhood embedding, providing a catalog separating all Swift GRBs into two groups. Although the classification takes place only using prompt emission light curves, every burst with an associated supernova is found in the longer group and bursts with kilonovae in the short, suggesting along with the duration distributions that these two groups are truly long and short GRBs. Two bursts with a clear absence of a supernova belong to the longer class, indicating that these might have been direct-collapse black holes, a proposed phenomenon that may occur in the deaths of more massive stars.2020ApJ...896L..20Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/896/L20CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)IX/20 : The Fourth BATSE Burst Revised Catalog (Paciesas+ 1999)J/ApJ/711/495 : Durations of Swift/BAT GRBs (Butler+, 2010)J/ApJ/731/103 : Redshift catalog for Swift long GRBs (Xiao+, 2011)J/A+A/568/A19 : Photometry of 3 {gamma}-ray burst supernovae (Cano+, 2014)J/ApJ/818/110 : Short GRBs with Fermi GBM and Swift BAT (Burns+, 2016)J/ApJ/828/36 : GRB light-curve decay indices with Swift (Del Vecchio+, 2016)J/ApJ/829/7 : 3rd Swift/BAT GRB catalog (past ~11yrs) (BAT3) (Lien+, 2016)J/A+A/609/A112 : Bulk Lorentz factors of gamma-ray bursts (Ghirlanda+, 2018)J/ApJS/248/21 : Swift long gamma-ray bursts (Hao+, 2020)http://swift.gsfc.nasa.gov/results/batgrbcat/ : Online Swift BAT GRB cataloghttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/896/L20https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/896/L20http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/896/L20https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/896/L20https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/896/L20http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/896/L20GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/896/L20/table1 (Classification of Swift GRBs)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/896/L20/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/896/L20/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/896/L20/table1?GETtext/xml+votable180.050000true126.4995833-13.27191670.0055555555555555566/126 140 156 186 205 207 210-211 228 236 272 314 338 393 398 423 453 462 500 503 550 576 590 646 699 744 825 866 877 908 918 923 944 1001 1040 1070 1087 1102 1133 1335 1436 1507 1526 1717 1793 1882 1987 2044 2118 2151 2238 2258 2296 2311 2315 2336 2357 2361 2385 2391 2456 2473 2574 2603 2682 2735 2760 2792-2793 2925 2929 2948-2949 3038 3056 3059 3071 3089 3098 3111 3267 3306 3316 3388 3399 3405 3462 3482 3506 3536 3547 3551 3586 3589 3597 3611 3659 3675 3700 3706 3708 3779 3832 3894 3927 3935 3965 4108 4271 4296 4312 4323-4324 4371 4378 4395 4397 4449-4450 4485 4595 4717 4788 4800 4809 4829 4868 4955 4977 4980 5051 5073 5080 5135 5162 5167 5184 5253 5353 5376 5455 5476 5481 5493 5525 5602 5606 5618 5625 5633 5657 5718 5726 5745 5752 5790-5791 5801 5840 5849 5878-5879 5941 5951 5987 5998 6004 6088 6102 6111 6228 6258 6261 6278 6404 6445 6521 6523 6593 6624 6752 6758 6862 6904 6961 6992 7043-7044 7054 7079 7084 7156 7164 7169 7182 7227 7254 7265 7276 7300 7322 7356 7363 7401 7518 7532 7558 7589 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39312 39344 39374 39432 39475 39540 39553 39599 39630 39682 39685 39691 39796 39829 39834 39872 39881 39912 39918 39924 39987 39993 40036 40167 40249 40272-40273 40351 40389 40433 40482 40547 40559 40611 40642 40670 40678 40684 40736 40778 40876 41020 41031 41059 41064 41135 41258 41309 41331 41435 41442 41555 41586 41596 41635 41685 41755 41856 41989 42096 42113 42133 42144 42175 42269 42293 42319 42426 42465 42468 42473 42524 42545 42560 42611 42663 42678 42730 42773 42840 42865 42892 42901 42909 42914 42930 42952 42971 43031-43032 43045 43050 43105 43170 43193 43201 43229 43270 43276 43280 43310 43409 43479 43558 43705 43710 43920 43947 44021-44022 44073 44093 44105 44125 44148 44160 44165 44189 44212 44221 44223 44246 44264 44291 44419 44436 44457 44481 44493 44543 44630 44715 44718 44720 44739 44773 44793 44795 44797 44822 44857 44918 45008 45088 45137 45150 45176 45180 45192 45205 45268 45287 45361 45399 45402 45409 45422 45431 45468 45483 45503 45510 45548 45561 45649 45665 45677 45725 45729 45762 45777 45827-45828 45835-45836 45852 45893 45895 45938 46002 46016 46022 46150 46212 46218 46250 46365 46375 46395 46510 46529 46594 46679 46757 46789 46814 46899 46910 46953 46989 47027 47031 47085 47117 47136 47148 47162 47245 47251 47253 47257 47271 47362 47436 47459 47588 47618 47620 47632 47740 47793 47882 47911 47927 47945 47991 48007 48054 48151 48189 48219 48254 48319 48371 48387 48422 48447 48458 48481 48498 48536 48594-48595 48597 48637 48646 48792 48872 48921 49004 49034https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/896/L20?format=asciiGamma-raydefaultJ/ApJ/896/L20/table1Classification of Swift GRBsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGamma-ray burst given namemeta.id;meta.maincharm_GRB[1/2]? Multiplicity number for GRB140716Ameta.code.multipintnullableT90[0.01/811]? Duration for 90% of measured fluencestime.durationfloatnullableTypeType of GRB using our classification scheme (1)meta.code.classcharBAT3Display data from the 3rd Swift/BAT GRB catalog (Lien+, 2016, J/ApJ/829/7) if anymeta.ref.urlintnullableSimbadNameSimbad column added by the CDSmeta.idcharnullableNEDNED column added by the CDSmeta.ref.urlchar_RAPositions from SIMBAD (right ascension part)degpos.eq.ra;meta.mainnullable_DEPositions from SIMBAD (declination part)degpos.eq.dec;meta.mainnullable