J/ApJ/851/L21ivo://CDS.VizieR/J/ApJ/851/L21doi:10.26093/cds/vizier.18519021CDSVillar V.A.Guillochon J.Berger E.Metzger B.D.Cowperthwaite P.S.,Nicholl M.Alexander K.D.Blanchard P.K.Chornock R.Eftekhari T.,Fong W.Margutti R.Williams P.K.G.2018-08-21T06:59:40Z2018-07-16T15:10:15ZCDS support team

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

cds-question@unistra.frgravitational-wavesinfrared-photometryvisible-astronomyWide-band photometryultraviolet-photometryWe present the first effort to aggregate, homogenize, and uniformly model the combined ultraviolet, optical, and near-infrared data set for the electromagnetic counterpart of the binary neutron star merger GW170817. By assembling all of the available data from 18 different papers and 46 different instruments, we are able to identify and mitigate systematic offsets between individual data sets and to identify clear outlying measurements, with the resulting pruned and adjusted data set offering an opportunity to expand the study of the kilonova. The unified data set includes 647 individual flux measurements, spanning 0.45-29.4d post-merger, and thus has greater constraining power for physical models than any single data set. We test a number of semi-analytical models and find that the data are well modeled with a three-component kilonova model: a "blue" lanthanide-poor component ({kappa}=0.5cm^2^/g) with M_ej_~0.020M_{sun}_ and v_ej_~0.27c; an intermediate opacity "purple" component ({kappa}=3cm^2^/g) with M_ej_~0.047M_{sun}_ and v_ej_~0.15c; and a "red" lanthanide-rich component ({kappa}=10cm^2^/g) with M_ej_~0.011M_{sun}_ and v_ej_~0.14c. We further explore the possibility of ejecta asymmetry and its impact on the estimated parameters. From the inferred parameters we draw conclusions about the physical mechanisms responsible for the various ejecta components, the properties of the neutron stars, and, combined with an up-to-date merger rate, the implications for r-process enrichment via this channel. To facilitate future studies of this keystone event we make the unified data set and our modeling code public.2017ApJ...851L..21Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/851/L21CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/848/L16 : Counterpart of GW170817. I. DECam obs. (Soares-Santos+, 2017)J/ApJ/848/L29 : Opt. follow-up of GW170817 counterpart (Diaz+, 2017)J/ApJ/848/L33 : Opt. follow-up of GW events with LCO (Arcavi+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/851/L21https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/851/L21http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/851/L21https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/851/L21https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/851/L21http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/851/L21GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticalInfraredUVdefaultJ/ApJ/851/L21/table3Photometric dataRefReference, ADS bibcode (2)meta.bib.bibcodecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMJD[57982.9/58012] MJD of observation (JD-2400000.5)dtime.epoch;obsdoublePhase[0.4/29.5] Phase of observation relative to 57982.529dtime.phasefloatInstInstrument namemeta.id;instrcharTelTelescope name (1)meta.id;instr.telcharBandFilter/Band namemeta.id;meta.maincharl_magUpper limit flagmeta.code.errorcharmag[7.4/27] New AB magnitude value used in modelingmagphot.magfloate_mag[0.01/0.7]? Reported errormagstat.error;phot.magfloatnullableDelta[-1.5/0] Difference between new and original valuemagphot.magfloatUse[*] Used in model (3)meta.codecharAvg[A] Averaged point (3)meta.codecharRt[R] Repeated observation (3)meta.codecharOut[O] Outlier (3)meta.codecharExc[X] Excluded from model (3)meta.codechar