J/ApJS/216/32ivo://CDS.VizieR/J/ApJS/216/32doi:10.26093/cds/vizier.22160032CDSConnaughton V.Briggs M.S.Goldstein A.Meegan C.A.Paciesas W.S.,Preece R.D.Wilson-Hodge C.A.Gibby M.H.Greiner J.Gruber D.,Jenke P.Kippen R.M.Pelassa V.Xiong S.Yu H.-F.Bhat P.N.,Burgess J.M.Byrne D.Fitzpatrick G.Foley S.Giles M.M.Guiriec S.,van der Horst A.J.von Kienlin A.McBreen S.McGlynn S.Tierney D.,Zhang B.-B.2017-11-29T11:48:51Z2015-03-18T09:36:31ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomyThe Fermi Gamma-ray Burst Monitor (GBM) has detected over 1400 gamma-ray bursts (GRBs) since it began science operations in 2008 July. We use a subset of over 300 GRBs localized by instruments such as Swift, the Fermi Large Area Telescope, INTEGRAL, and MAXI, or through triangulations from the InterPlanetary Network, to analyze the accuracy of GBM GRB localizations. We find that the reported statistical uncertainties on GBM localizations, which can be as small as 1{deg}, underestimate the distance of the GBM positions to the true GRB locations and we attribute this to systematic uncertainties. The distribution of systematic uncertainties is well represented (68% confidence level) by a 3.{deg}7 Gaussian with a non-Gaussian tail that contains about 10% of GBM-detected GRBs and extends to approximately 14{deg}. A more complex model suggests that there is a dependence of the systematic uncertainty on the position of the GRB in spacecraft coordinates, with GRBs in the quadrants on the Y axis better localized than those on the X axis.2015ApJS..216...32Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/216/32CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/211/13 : The second Fermi/GBM GRB catalog (4yr) (von Kienlin+, 2014)J/ApJS/207/39 : IPN supplement to the Fermi GBM (Hurley+, 2013)J/ApJS/207/38 : IPN localizations of Konus short GRBs (Pal'shin+, 2013)J/ApJ/763/15 : Fermi GRB analysis. III. T_90_ distributions (Qin+, 2013)J/MNRAS/431/3608 : BeppoSAX/GRBM and Fermi/GBM long GRBs (Dichiara+, 2013)J/ApJ/760/12 : LIGO/Virgo gravitational-wave (GW) bursts (Abadie+, 2012)J/ApJ/756/112 : Fermi/GBM GRB time-resolved spectral analysis (Lu+, 2012)J/ApJ/754/121 : GRBs from Fermi/GBM and LAT (The Fermi Team, 2012)J/ApJS/199/18 : The Fermi GBM catalog (Paciesas+, 2012)J/A+A/530/A21 : Spectral properties of 438 GRBs (Nava+, 2011)J/A+A/525/A53 : GBM parameters for detected FERMI bursts (Guetta+, 2011)http://fermi.gsfc.nasa.gov/ssc/data/access/gbm : Fermi GBM online datahttp://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html : Fermi GMB bursthttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/216/32https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/216/32http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/216/32https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/216/32https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/216/32http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/216/32GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/216/32/table9 (203 reference locations for GRBs that were also detected by GBM and which we use to assess the accuracy of GBM locations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/216/32/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/216/32/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/216/32/table9?GETtext/xml+votable180.050000true183.5-57.50.005555555555555556Cone search capability for table J/ApJS/216/32/table10 (134 locations for GRBs that were also triangulated by IPN)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/216/32/table10?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/216/32/table10?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/216/32/table10?GETtext/xml+votable180.050000true213.312.20.0055555555555555566/217 336 506 546 585 803 1618 2039 2438 2488 2737 2745 2849 2855 2903 3049 3054 3056 3169 3311 3538 3650 3806 3947 4049 4082 4292 4378 4510 4564 4570 4597 4820 5012 5021 5029 5065 5227 5265 5275 5370 5375 5718 5869 5912 5928 5968 6143 6153 6631 6700 7198 7505 7560 7877 7908 8066 8181 8188 8489 8713 8873 9064 9110 9219 9253 9273 9437 9451 9568 9624 9631 9744 9829 9854 10170 10226 10304 10327 10342 10631 10998 11065 11131 11233 11372 11437 11563 11787 12170 12322 12583 12686 12923 13188 13212 13565 13777 13873 14072 14235 14253 14320 14458 14460 14503 14727 14738 14750 14998 15167 15433 15504 15728 15780 15791 16075 16114 16272 16307 16659 16661 16667 16890 16955 17031 17174 17327 17357 17443 17447 17486 17572 17753 17877 18175 18468 18602 18719 18752 19282 19426 19499 19546 19550 19934 20077 20204 20207 20383 20660 20671 20741 20941 21114 21287 21501 21595 21741 21816 21844 21880 21995 22013 22162 22257 22275 22399 22560 22641 22844 23166 23491 23509 23526 23528 23540 23578 23948 24069 24146 24166 24188 24240 24268 24269 24371 24508 24558 25159 25178 25224 25293 25680 26114 26160 26371 26731 26771 26955 27100 27356 27619 27965 28033 28104 28126 28375 28695 28721 28825 29007 29440 29511 29728 29921 30142 30231 30250 30598 30871 31361 31527 31538 31604 31641 31736 32138 32155 32428 32479 32582 32949 33058 33086 33114 33276 33790 33798 33922 34456 34915 34975 35491 35583 35593 35653 35719 36095 36427 36523 36580 36611 36830 36866 36973 37068 37180 37183 37244 37275 37432 37453 37654 37737 37798 37913 38008 38362 38951 39084 39425 39440 39471 40173 40186 40303 40326 40461 40498 40519 40626 40726 40841 40857 40916 41056 41061 41263 41493 41790 42446 42475 42536 42830 43145 43200 43307 43489 43871 43964 44153 44233 44237 44327 44432 44636 44743 44770 45369 45392 45407 45453 45482 45687 45909 45938 45947 45974 46085 46240 46596 46719 46787 46838 46953 46993 47026 47152 47226 47276 47440 47838 48091 48690 48854 49131https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/216/32?format=asciiGamma-raydefaultJ/ApJS/216/32/table9203 reference locations for GRBs that were also detected by GBM and which we use to assess the accuracy of GBM locationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTIDBurst identifier (YYMMDDNN)meta.idlongGRBCommon name (YYMMDDA)meta.id;meta.maincharTimeUT trigger timetime.epochnullableRA1deg? First on board Flight Software (FSW) Right Ascension (J2000) (1)degpos.eq.ranullableDE1deg? First on board Flight Software (FSW) Declination (J2000) (1)degpos.eq.decnullableePos1? First FSW position errordegstat.error;posfloatnullableRA2deg? Last on board Flight Software (FSW) Right Ascension (J2000) (1)degpos.eq.ranullableDE2deg? Last on board Flight Software (FSW) Declination (J2000) (1)degpos.eq.decnullableePos2? Last FSW position errordegstat.error;posfloatnullableRA3deg? Ground auto Right Ascension (J2000) (1)degpos.eq.ranullableDE3deg? Ground auto Declination (J2000) (1)degpos.eq.decnullableePos3? Ground auto position errordegstat.error;posfloatnullableRAJ2000H.i.t.L Right Ascension (J2000) (1) (G1)degpos.eq.ra;meta.mainDEJ2000H.i.t.L Declination (J2000) (1) (G1)degpos.eq.dec;meta.mainePosH.i.t.L position error (G1)degstat.errorfloatRA4degReference Right Ascension (J2000) (1)degpos.eq.raDE4degReference Declination (J2000) (1)degpos.eq.decAutFirst author's name of the referencemeta.bib.authorcharGCN[859/14842] GCN number of the referencemeta.idintGCatDisplay data from the 2nd Fermi/GBM catalog (J/ApJS/211/13) if anymeta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlcharNEDSimbad column added by the CDSmeta.ref.urlcharJ/ApJS/216/32/table10134 locations for GRBs that were also triangulated by IPNrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTIDBurst identifier (YYMMDDNN)meta.idlongf_TID[1] 2 intersecting arcs (1)meta.codecharGRBCommon name (YYMMDDA)meta.id;meta.maincharTimeUT trigger timetime.epochnullableRAIdeg? IPN annulus Right Ascension (J2000)degpos.eq.ranullablef_RAIdeg[1] Flag on IRAdeg (1)meta.codecharDEIdeg? IPN annulus Declination (J2000)degpos.eq.decnullablef_DEIdeg[1] Flag on IDEdeg (1)meta.codecharePosI? IPN annulus position error, or second arc (1)degstat.error;posfloatnullablef_ePosI[1] Flag on e_IPNpos (1)meta.codecharIWidth? IPN annulus width, or second arc (1)degstat.errorfloatnullablef_IWidth[1] Flag on IWidth (1)meta.codecharRA1deg? First on board Flight Software (FSW) Right Ascension (J2000)degpos.eq.ranullableDE1deg? First on board Flight Software (FSW) Declination (J2000)degpos.eq.decnullableePos1? First FSW position errordegstat.error;posfloatnullableRA2deg? Last on board Flight Software (FSW) Right Ascension (J2000)degpos.eq.ranullableDE2deg? Last on board Flight Software (FSW) Declination (J2000)degpos.eq.decnullableePos2? Last FSW position errordegstat.error;posfloatnullableRA3deg? Ground auto Right Ascension (J2000)degpos.eq.ranullableDE3deg? Ground auto Declination (J2000)degpos.eq.decnullableePos3? Ground auto position errordegstat.error;posfloatnullableRAJ2000H.i.t.L Right Ascension (J2000) (G1)degpos.eq.ra;meta.mainDEJ2000H.i.t.L Declination (J2000) (G1)degpos.eq.dec;meta.mainePosH.i.t.L position error (G1)degstat.errorfloatGBMDisplay data from the 2nd Fermi/GBM catalog (J/ApJS/211/13)meta.ref.urlcharSimbadSimbad column added by the CDSmeta.ref.urlchar