J/ApJ/843/143ivo://CDS.VizieR/J/ApJ/843/143doi:10.26093/cds/vizier.18430143CDSSteele I.A.Kopac D.Arnold D.M.Smith R.J.Kobayashi S.Jermak H.E.,Mundell C.G.Gomboc A.Guidorzi C.Melandri A.Japelj J.2018-05-16T07:04:34Z2018-04-03T09:51:50ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstspolarimetryvisible-astronomysloan-photometryredshiftedWe present a catalog of early-time (~10^2^-10^4^s) photometry and polarimetry of all gamma-ray burst (GRB) optical afterglows observed with the RINGO2 imaging polarimeter on the Liverpool Telescope. Of the 19 optical afterglows observed, the following nine were bright enough to perform photometry and attempt polarimetry: GRB100805A, GRB101112A, GRB110205A, GRB110726A, GRB120119A, GRB120308A, GRB120311A, GRB120326A, and GRB120327A. We present multiwavelength light curves for these 9 GRBs, together with estimates of their optical polarization degrees and/or limits. We carry out a thorough investigation of detection probabilities, instrumental properties, and systematics. Using two independent methods, we confirm previous reports of significant polarization in GRB 110205A and 120308A, and report the new detection of P=6_-2_^+3^% in GRB101112A. We discuss the results for the sample in the context of the reverse- and forward-shock afterglow scenario, and show that GRBs with detectable optical polarization at early time have clearly identifiable signatures of reverse-shock emission in their optical light curves. This supports the idea that GRB ejecta contain large-scale magnetic fields, and it highlights the importance of rapid-response polarimetry.2017ApJ...843..143Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/843/143CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/743/154 : Multi-band photom. of GRB 110205A+110213A (Cucchiara+, 2011)J/ApJ/746/156 : Radio afterglow observations of GRBs (Chandra+, 2012)J/ApJ/763/15 : Fermi GRB analysis. III. T_90_ distributions (Qin+, 2013)J/ApJ/772/73 : GRB with early-time optical emission (Kopac+, 2013)J/ApJS/209/20 : Swift GRB catalog with X-ray data (Grupe+, 2013)J/MNRAS/428/729 : GRB Swift X-ray light curves analysis (Margutti+, 2013)J/A+A/565/A72 : Optical & X-ray light curves of BAT6 sample (Melandri+, 2014)J/ApJ/787/66 : Burst duration measurements for a GRB sample (Zhang+, 2014)J/ApJ/787/90 : Gamma-ray bursts minimum timescales (Golkhou+, 2014)J/A+A/581/A125 : UV/Optical/NIR spectroscopy GRB hosts (Kruehler+, 2015)J/A+A/584/A48 : New redshifts of 357 GBBs (Horvath+, 2015)J/ApJ/800/16 : Swift-XRT long GRB durations (Boer+, 2015)J/ApJ/811/93 : Fermi/GBM GRB minimum timescales (Golkhou+, 2015)J/ApJ/814/1 : GRB 120326A, 100418A+100901A observations (Laskar+, 2015)J/ApJ/826/45 : GRB X-ray afterglows light curves analysis (Racusin+, 2016)J/ApJ/828/36 : GRB light-curve decay indices with Swift (Del Vecchio+, 2016)J/ApJS/224/20 : 10yr of Swift/XRT obs. of GRBs (Yi+, 2016)J/ApJS/227/7 : Long + short GRBs with host galaxies data (Li+, 2016)J/A+A/589/A97 : GRBs Ep and Fourier PDS slope correlation (Dichiara+, 2016)J/A+A/589/A98 : Swift GRBs individual power density spectra (Guidorzi+, 2016)J/MNRAS/464/4545 : GRBs with Swift data (2004-2015) (Buchner+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/843/143https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/843/143http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/843/143https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/843/143https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/843/143http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/843/143GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/843/143/table2 (The complete 19 GRB afterglows observed with RINGO2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/843/143/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/843/143/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/843/143/table2?GETtext/xml+votable180.050000true2.46862547.75530560.0055555555555555566/866 2793 7182 7363 7532 10602 11904 12226 14372 14588 14846 15214 15653 16057 21595 26076 30235 31958 42901https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/843/143?format=asciiGamma-rayOpticaldefaultJ/ApJ/843/143/table3Polarization resultsGRBGRB namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintt-T0lLower range of t-T_0_ (RINGO2 obs. interval)stime.epochintt-T0uUpper range of t-T_0_ (RINGO2 obs. interval)stime.epochintl_PolUpper limit flag on Polmeta.code.errorcharPol[4/28] Degree of polarization%phys.polarizationinte_Pol[2/9]? Negative uncertainty on Pol%stat.errorintnullableE_Pol[3/13]? Positive uncertainty on Pol%stat.error;stat.maxintnullableEVPA[34/126]? Measured polarization sky angle (east of north)degpos.posAng;phys.polarizationintnullablee_EVPA[4/26]? EVPA uncertaintydegstat.errorintnullablel_RankLower limit flag on Rankmeta.code.errorcharRank[0.008/1] Rank of the polarization measurement in permutation analysismeta.id;phys.polarizationfloatl_tpkUpper limit flag on tpkmeta.code.errorchartpk[140/1664] Optical afterglow peak timestime.epochfloate_tpk[6/16]? tpk uncertaintysstat.errorfloatnullableT90[3.5/249] Gamma-ray emission durationstime.durationfloatAv[0/0.92] Galactic extinction in V bandmagphys.absorption.galfloatl_z[<~ ] Uncertainty flag on zmeta.code.error;src.redshiftcharz[1.3/3.5]? Redshiftsrc.redshiftfloatnullablef_za: GRB110726A has 1.04<z<2.7meta.codechare_z? Negative uncertainty on zstat.error;src.redshiftfloatnullableE_z? Positive uncertainty on zstat.error;stat.maxfloatnullableJ/ApJ/843/143/table5RINGO2 complete photometryGRBGamma-ray burst identifiermeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordinttStart[1.9/1351]? Start timemintime.epochfloatnullableExp[7/7200]? Exposure timestime.duration;obs.exposurefloatnullableInstInstrument used in the observation (PROMPT, RATCam, RINGO or UVOT) (1)instr.setup;obscharFiltFilter used in the observation (I, R, g'i'r'z', or ubv)instr.setup;obscharmag[14.3/23.1]? Apparent magnitude in Filter; corrected for the Galactic extinctionmagphot.magfloatnullablee_mag[0.01/0.6]? Uncertainty in magmagstat.error;phot.magfloatnullableFlux[0.003/7.1]? Flux densitymJyphot.flux.densityfloatnullablee_Flux[0.001/0.6]? Uncertainty in FluxmJystat.error;phot.fluxfloatnullableJ/ApJ/843/143/table2The complete 19 GRB afterglows observed with RINGO2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBGRB name (1)meta.id;meta.maincharprimaryt-T0lLower range of t-T_0_ (2)stime.epochintt-T0uUpper range of t-T_0_ (2)stime.epochintl_r'mag[>~] Upper or uncertainty flag on r'mag (3)meta.code.errorcharr'mag[15.7/22.5]? r' band magnitude at mid-time of the RINGO2 epochphot.mag;em.opt.Rfloatnullablee_r'mag[0.03/0.7]? r'mag uncertainty (4)stat.errorfloatnullabletmag[215/42469]? Nearest time (3)stime.epochintnullableAuthGCN Author' reference (3)meta.ref;pos.framecharRefGCN bibcode' reference (3)meta.bib.bibcodecharPolDisplay the polarization results for this GRB (table 3)meta.ref.urlintnullableNpNumber of photometry measurements for this GRB (table 5)meta.numberintnullableLCPhotometry interactive plotmeta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlcharNEDNED column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main