J/ApJ/862/94ivo://CDS.VizieR/J/ApJ/862/94doi:10.26093/cds/vizier.18620094CDSLaskar T.Alexander K.D.Berger E.Guidorzi C.Margutti R.Fong W.-F.,Kilpatrick C.D.Milne P.Drout M.R.Mundell C.G.Kobayashi S.,Lunnan R.Barniol Duran R.Menten K.M.Ioka K.Williams P.K.G.2019-08-22T06:59:47Z2019-08-20T11:06:31ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsinfrared-photometryvisible-astronomybroad-band-photometrymillimeter-astronomyphotometrysubmillimeter-astronomyradio-continuum-emissionultraviolet-astronomyWe present detailed multiwavelength observations of GRB 161219B at z=0.1475, spanning the radio to X-ray regimes, and the first Atacama Large Millimeter/submillimeter Array (ALMA) light curve of a {gamma}-ray burst (GRB) afterglow. The centimeter- and millimeter-band observations before 8.5 days require emission in excess of that produced by the afterglow forward shock (FS). These data are consistent with radiation from a refreshed reverse shock (RS) produced by the injection of energy into the FS, signatures of which are also present in the X-ray and optical light curves. We infer a constant- density circumburst environment with an extremely low density, n_0_~3x10^-4^cm^-3^, and show that this is a characteristic of all strong RS detections to date. The Karl G. Lansky Very Large Array (VLA) observations exhibit unexpected rapid variability on roughly minute timescales, indicative of strong interstellar scintillation. The X-ray, ALMA, and VLA observations together constrain the jet break time, t_jet_~32 days, yielding a wide jet opening angle of {theta}_jet_~13{deg}, implying beaming-corrected {gamma}-ray and kinetic energies of E_{gamma}~4.9x10^48^erg and E_K_~1.3x10^50^erg, respectively. Comparing the RS and FS emission, we show that the ejecta are only weakly magnetized, with relative magnetization, R_B_~1, compared to the FS. These direct, multifrequency measurements of a refreshed RS spanning the optical to radio bands highlight the impact of radio and millimeter data in probing the production and nature of GRB jets.2018ApJ...862...94Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/862/94CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/swift : Swift Master Catalog (HEASARC, 2004-)B/eso : ESO Science Archive Catalog (ESO, 1991-2019)J/A+A/474/793 : INTEGRAL observations of GRB 070311 (Guidorzi+, 2007)J/ApJ/686/1209 : Optical properties of GRB afterglows (Melandri+, 2008)J/MNRAS/397/1177 : Swift-XRT observations of GRBs (Evans+, 2009)J/A+A/560/A70 : GRB 100621A unusual afterglow (Greiner+, 2013)J/A+A/562/A29 : GRB 100814A GROND and UVOT light curves (Nardini+, 2014)J/ApJ/781/37 : Multi-band photometry of GRB 130427A (Perley+, 2014)J/ApJ/814/1 : GRB 120326A, 100418A, 100901A multi-wave. obs. (Laskar+, 2015)J/ApJ/833/88 : GRB 160509A VLA monitoring campain results (Laskar+, 2016)J/ApJ/858/65 : A VLA study of high-z GRBs. I. GRB140311A (Laskar+, 2018)http://www.swift.ac.uk/xrt_positions/727541/ : Swift-XRT position of GRB161219Bhttp://www.swift.ac.uk/xrt_spectra/727541/ : Swift-XRT spectra of GRB161219Bhttp://www.swift.ac.uk/xrt_curves/727541/ : Swift-XRT LCs of GRB161219Bhttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/862/94https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/862/94http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/862/94https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/862/94https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/862/94http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/862/94GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayInfraredOpticalMillimeterRadioUVdefaultJ/ApJ/862/94/table3Optical and Near-IR observations of GRB 161219BrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTime[0.0005/277] Mid-time of observation since discovery: 2016 December 19 18:48:39 UTdtime.epoch;obsdoubleObsObservatory and instrument identifiersmeta.id;instrcharFilterFilter used (1)instr.setup;instr.filtercharFreq[1.3e+14/8.4e+14] Frequency of FilterHzem.freq;instr.filterdoubleFlux[0.004/1.4] Flux density in Filter (2)mJyphot.flux.densitydoublee_Flux[2.3e-05/0.5] Uncertainty in Flux (3)mJystat.error;phot.fluxdoubleDet[0/1] Detection code (1=Yes or 0=No)meta.code;instr.saturationintRefObservation referencemeta.refcharJ/ApJ/862/94/table4GRB 161219B: log of ALMA observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTimeMid-time of observation since discovery: 2016 December 19 18:48:39 UTdtime.epoch;obsfloatFreq[91.5/103.5] FrequencyGHzem.freqfloatS[51/1332] Flux densityuJyphot.flux.densityinte_S[14/43] S uncertaintyuJystat.errorintJ/ApJ/862/94/table5GRB 161219B: log of VLA observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTime[0.5/159.1] Mid-time of observation since discovery: 2016 December 19 18:48:39 UTdtime.epoch;obsdoubleFreq[1.2/33.5] FrequencyGHzem.freqfloatFlux[56.6/3505] Flux density at FrequJyphot.flux.density;em.radiodoublee_Flux[8.6/150] Uncertainty in FluxuJystat.error;phot.fluxdoubleDet[1] Detection code (1=Yes or 0=No)meta.code;instr.saturationintJ/ApJ/862/94/table2Swift UVOT observations of GRB 161219BDet[0/1] Detection code (1=Yes or 0=No)meta.code;instr.saturationintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTime[0.002/122.6] Mid-time of observation since discovery: 2016 December 19 18:48:39 UTdtime.epoch;obsdoubleBandSwift/UVOT bandinstr.bandpasscharFlux[0.002/0.9] Flux density in BandmJyphot.flux.densitydoublee_Flux[0.0003/0.2] Uncertainty in FluxmJystat.error;phot.fluxdouble