J/ApJ/922/154ivo://CDS.VizieR/J/ApJ/922/154doi:10.26093/cds/vizier.19220154CDSMakhathini S.Mooley K.P.Brightman M.Hotokezaka K.Nayana A.J.,Intema H.T.Dobie D.Lenc E.Perley D.A.Fremling C.Moldon J.,Lazzati D.Kaplan D.L.Balasubramanian A.Brown I.S.Carbone D.,Chandra P.Corsi A.Camilo F.Deller A.Frail D.A.Murphy T.,Murphy E.J.Nakar E.Smirnov O.Beswick R.J.Fender R.Hallinan G.,Heywood I.Kasliwal M.Lee B.Lu W.Rana J.Perkins S.White S.V.,Jozsa G.I.G.Hugo B.Kamphuis P.2023-07-03T14:30:55Z2023-04-25T09:19:02ZCDS support team

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

cds-question@unistra.frgravitational-wavesradio-sourcesx-ray-sourcesvisible-astronomyWe present the full panchromatic afterglow light-curve data of GW170817, including new radio data as well as archival optical and X-ray data, between 0.5 and 940 days post-merger. By compiling all archival data and reprocessing a subset of it, we have evaluated the impact of differences in data processing or flux determination methods used by different groups and attempted to mitigate these differences to provide a more uniform data set. Simple power-law fits to the uniform afterglow light curve indicate a t^0.86+/-0.04^ rise, a t^-1.92+/-0.12^ decline, and a peak occurring at 155+/-4 days. The afterglow is optically thin throughout its evolution, consistent with a single spectral index (-0.584+/-0.002) across all epochs. This gives a precise and updated estimate of the electron power-law index, p=2.168+/-0.004. By studying the diffuse X-ray emission from the host galaxy, we place a conservative upper limit on the hot ionized interstellar medium density, <0.01cm^-3^, consistent with previous afterglow studies. Using the late-time afterglow data we rule out any long-lived neutron star remnant having a magnetic field strength between 10^10.4^ and 10^16^G. Our fits to the afterglow data using an analytical model that includes Very Long Baseline Interferometry proper motion from Mooley+ (2018Natur.561..355M), and a structured jet model that ignores the proper motion, indicates that the proper-motion measurement needs to be considered when seeking an accurate estimate of the viewing angle.2021ApJ...922..154Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/922/154CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)B/xmm : XMM-Newton Obs. Log (XMM-Newton Science Operation Center, 2012)B/chandra : The Chandra Archive Log (CXC, 1999-2014)J/A+A/594/A116 : HI4PI spectra and column density maps (HI4PI team+, 2016)J/A+A/598/A78 : The GMRT 150MHz all-sky radio survey (Intema+, 2017)J/ApJS/230/7 : Spectral flux densities from 50MHz to 50GHz (Perley+, 2017)J/ApJ/848/L16 : Counterpart of GW170817. I. DECam obs. (Soares-Santos+, 2017)J/ApJ/851/L21 : UV-NIR compilation of GW170817 counterpart (Villar+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/922/154https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/922/154http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/922/154https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/922/154https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/922/154http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/922/154GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayOpticalRadiodefaultJ/ApJ/922/154/table2Radio afterglow measurements of GW170817recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateUT observation date/rangetime.epoch;obscharDeltaT[0.57/938] Time since GW detectiondtime.epoch;arith.difffloatInstFacility or Instrument usedmeta.id;instrcharFreq[0.114/3000000000] FrequencyGHzem.freqdoublel_FluxLimit flag on Fluxmeta.code.error;phot.fluxcharFlux[0.00013/44700] Flux density at FrequJyphot.flux.density;em.radiodoubleE_Flux[4.6e-05/0.00042]? Upper uncertainty in FluxuJystat.error;stat.maxdoublenullablee_Flux[5.9e-05/34]? Lower uncertainty in FluxuJystat.error;phot.fluxdoublenullableRep?Reprocessed data? (Y)es or (N)ometa.codecharRefOriginal reference bibcode(s)meta.bib.bibcodecharJ/ApJ/922/154/table3Chandra and XMM-Newton observational dataInstInstrumentmeta.id;instrcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintObsID[18955/811212701] Observation identifiermeta.id;obs.param;obslongExp[14.22/74.09] Exposure timekstime.duration;obs.exposurefloatDateDate of observation (UT)time.epochnullablePIPI nameobs.observercharl_CRateLimit flag on CRatemeta.code.errorcharCRate[0.02/2.17] X-ray count rate (1)ks**-1phot.count;em.X-rayfloate_CRate[0.03/0.4]? CRate uncertaintyks**-1stat.errorfloatnullablel_FluxLimit flag on Fluxmeta.code.error;phot.fluxcharFlux[0.06/3.46] 0.3-10keV flux, corrected for Galactic absorption; in 10^-14^erg/cm^2^/s units1e-17W.m**-2phot.flux;em.X-rayfloate_Flux[0.08/0.92]? Lower uncertainty on Flux1e-17W.m**-2stat.error;phot.fluxfloatnullableE_Flux[0.08/1.14]? Upper uncertainty on Flux1e-17W.m**-2stat.error;stat.maxfloatnullable