J/MNRAS/473/1512ivo://CDS.VizieR/J/MNRAS/473/1512doi:10.26093/cds/vizier.74731512CDSAnderson G.E.Staley T.D.van der Horst A.J.Fender R.P.Rowlinson A.,Mooley K.P.Broderick J.W.Wijers R.A.M.J.Rumsey C.Titterington D.J.2024-08-17T20:21:19Z2020-09-17T07:23:27ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomygamma-ray-burstsradio-sourcesWe present the Arcminute Microkelvin Imager (AMI) Large Array catalogue of 139 gamma-ray bursts (GRBs). AMI observes at a central frequency of 15.7GHz and is equipped with a fully automated rapid-response mode, which enables the telescope to respond to high-energy transients detected by Swift. On receiving a transient alert, AMI can be on-target within 2-min, scheduling later start times if the source is below the horizon. Further AMI observations are manually scheduled for several days following the trigger. The AMI GRB programme probes the early-time (<1d) radio properties of GRBs, and has obtained some of the earliest radio detections (GRB 130427A at 0.36 and GRB 130907A at 0.51d post-burst). As all Swift GRBs visible to AMI are observed, this catalogue provides the first representative sample of GRB radio properties, unbiased by multiwavelength selection criteria. We report the detection of six GRB radio afterglows that were not previously detected by other radio telescopes, increasing the rate of radio detections by 50 per cent over an 18-month period. The AMI catalogue implies a Swift GRB radio detection rate of >~15 per cent, down to ~0.2mJy/beam. However, scaling this by the fraction of GRBs AMI would have detected in the Chandra & Frail (2012, Cat. J/ApJ/746/156) sample (all radio-observed GRBs between 1997 and 2011), it is possible ~44-56 per cent of Swift GRBs are radio bright, down to ~0.1-0.15mJy/beam. This increase from the Chandra & Frail (2012, Cat. J/ApJ/746/156) rate (~30 per cent) is likely due to the AMI rapid-response mode, which allows observations to begin while the reverse-shock is contributing to the radio afterglow.2018MNRAS.473.1512Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/473/1512CatalogResearchIsServedByTAP VizieR generic servicerelated-toIX/51 : GRB list (1990-2014) (Ruggeri+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/473/1512https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/473/1512http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/473/1512https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/473/1512https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/473/1512http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/473/1512GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayRadiodefaultJ/MNRAS/473/1512/table1The AMI 15.7GHz GRB catalogue: GRBs that have been detected or possibly detected with AMIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBName of GRB (1)meta.id;meta.maincharFlagRadio detection flag (2)meta.code.errorcharTelBest Swift telescope position (3)instr.tel;meta.modelledcharDateDate of AMI observation (4)time.epochnullablen_Date[C] C for Concat (4)meta.notecharStart? Start of observation in Modified Julian Date (MJD) formatdtime.start;obsdoublenullableInt? Length of AMI observationhtime.intervalfloatnullableDayPburst? Number of days post-burst since the start of the AMI observationdmeta.number;time.start;obsfloatnullableMinPburst? Number of minutes post-burst since the start of the AMI observation (5)minmeta.number;time.start;obsfloatnullableDet[*] * indicates the observations where the listed peak flux is a radio detection (6)meta.codecharFpeak? Peak flux at 15.7GHz of the radio afterglow (7)mJy/beamphot.flux.density;em.radio.12-30GHzfloatnullablee_Fpeak? Error in the peak flux at 15.7GHz measurement (1 sigma) (8)mJy/beamstat.errorfloatnullableSigniSignificance of the flux measured in units of sigma above the local RMSstat.fit.goodness;phot.flux;arith.ratiofloatRMSThe global RMS of the middle quarter of the AMI imagemJy/beamstat.stdevfloatSimbadSimbad column added by the CDSmeta.ref.urlcharJ/MNRAS/473/1512/table2The AMI 15.7GHz GRB catalogue: GRBs that were not detected with AMI, have a possible steady source association or a concatenated detectionrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGRBName of GRB (1)meta.id;meta.maincharTypeShort (S) or long (L) duration GRBmeta.codecharFlagRadio detection flag (2)meta.code.errorcharTelBest Swift telescope position (3)instr.tel;meta.modelledcharDateDate of AMI observation (4)time.epochnullablen_Date[C] C for Concat (4)meta.notecharStart? Start of observation in Modified Julian Date (MJD) formatdtime.start;obsdoublenullableInt? Length of AMI observationhtime.intervalfloatnullableDayPburst? Number of days post-burst since the start of the AMI observationdmeta.number;time.start;obsfloatnullableMinPburst? Number of minutes post-burst since the start of the AMI observation (5)minmeta.number;time.start;obsfloatnullableDet[*] * indicates the observations where the listed peak flux is a radio detection (6)meta.codecharFpeakPeak flux 15.7GHz of the radio afterglow (7)mJy/beamphot.flux.density;em.radio.12-30GHzfloate_FpeakError in the peak flux 15.7GHz measurement (1 sigma) (8)mJy/beamstat.errordoubleSigniSignificance of the flux measured in units of sigma above the local RMSstat.fit.goodness;phot.flux;arith.ratiofloatRMSThe global RMS of the middle quarter of the AMI imagemJy/beamstat.stdevfloatSimbadSimbad column added by the CDSmeta.ref.urlchar