J/ApJ/754/121ivo://CDS.VizieR/J/ApJ/754/121doi:10.26093/cds/vizier.17540121CDSThe Fermi Large Area Telescope TeamAckermann M.Ajello M.Baldini L.,Barbiellini G.Baring M.G.Bechtol K.Bellazzini R.Blandford R.D.,Bloom E.D.Bonamente E.Borgland A.W.Bottacini E.Bouvier A.,Brigida M.Buehler R.Buson S.Caliandro G.A.Cameron R.A.Cecchi C.,Charles E.Chekhtman A.Chiang J.Ciprini S.Claus R.Cohen-Tanugi J.,Cutini S.D'ammando F.De Palma F.Dermer C.D.do Couto e Silva E.,Drell P.S.Drlica-Wagner A.Favuzzi C.Fukazawa Y.Fusco P.,Gargano F.Gasparrini D.Gehrels N.Germani S.Giglietto N.,Giordano F.Giroletti M.Glanzman T.Granot J.Grenier I.A.,Grove J.E.Hadasch D.Hanabata Y.Harding A.K.Hays E.Horan D.,Johannesson G.Kataoka J.Knodlseder J.Kocevski D.Kuss M.Lande J.,Longo F.Loparco F.Lovellette M.N.Lubrano P.Mazziotta M.N.,McEnery J.McGlynn S.Michelson P.F.Mitthumsiri W.Monzani M.E.,Moretti E.Morselli A.Moskalenko I.V.Murgia S.Naumann-Godo M.,Norris J.P.Nuss E.Nymark T.Ohsugi T.Okumura A.Omodei N.,Orlando E.Panetta J.H.Parent D.Pelassa V.Pesce-Rollins M.,Piron F.Pivato G.Racusin J.L.Raino S.Rando R.Razzaque S.,Reimer A.Reimer O.Ritz S.Ryde F.Sgro C.Siskind E.J.Sonbas E.,Spandre G.Spinelli P.Stamatikos M.Stawarz L.Suson D.J.,Takahashi H.Tanaka T.Thayer J.G.Thayer J.B.Tibaldo L.,Tinivella M.Tosti G.Uehara T.Vandenbroucke J.Vasileiou V.,Vianello G.Vitale V.Waite A.P.,(the Fermi Gamma-ray Burst Monitor Team)Connaughton V.Briggs M.S.,Guirec S.Goldstein A.Burgess J.M.Bhat P.N.Bissaldi E.,Camero-Arranz A.Fishman J.Fitzpatrick G.Foley S.Gruber D.,Jenke P.Kippen R.M.Kouveliotou C.McBreen S.Meegan C.,Paciesas W.S.Preece R.Rau A.Tierney D.van der Horst A.J.,von Kienlin A.Wilson-Hodge C.Xiong S.2017-11-06T12:23:22Z2014-04-04T15:23:36ZCDS support team

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

cds-question@unistra.frgamma-ray-astronomyWe examine 288 gamma-ray bursts (GRBs) detected by the Fermi Gamma-ray Space Telescope's Gamma-ray Burst Monitor (GBM) that fell within the field of view of Fermi's Large Area Telescope (LAT) during the first 2.5 years of observations, which showed no evidence for emission above 100MeV. We report the photon flux upper limits in the 0.1-10GeV range during the prompt emission phase as well as for fixed 30s and 100s integrations starting from the trigger time for each burst. We compare these limits with the fluxes that would be expected from extrapolations of spectral fits presented in the first GBM spectral catalog and infer that roughly half of the GBM-detected bursts either require spectral breaks between the GBM and LAT energy bands or have intrinsically steeper spectra above the peak of the {nu}F_{nu}_ spectra (E_pk_). In order to distinguish between these two scenarios, we perform joint GBM and LAT spectral fits to the 30 brightest GBM-detected bursts and find that a majority of these bursts are indeed softer above E_pk_ than would be inferred from fitting the GBM data alone. Approximately 20% of this spectroscopic subsample show statistically significant evidence for a cutoff in their high-energy spectra, which if assumed to be due to {gamma}{gamma} attenuation, places limits on the maximum Lorentz factor associated with the relativistic outflow producing this emission. All of these latter bursts have maximum Lorentz factor estimates that are well below the minimum Lorentz factors calculated for LAT-detected GRBs, revealing a wide distribution in the bulk Lorentz factor of GRB outflows and indicating that LAT-detected bursts may represent the high end of this distribution.2012ApJ...754..121Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/754/121CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/559/A9 : Neutrinos from GRBs with ANTARES (Adrian-Martinez+ 2013)J/ApJS/207/39 : IPN supplement to the Fermi GBM (Hurley+, 2013)J/ApJS/199/18 : The Fermi GBM catalog (Paciesas+, 2012)J/A+A/525/A53 : GBM parameters for detected FERMI bursts (Guetta+, 2011)J/MNRAS/418/2202 : Analysis of {gamma}-ray bursts (Dainotti+, 2011)J/ApJ/711/495 : Durations of Swift/BAT GRBs (Butler+, 2010)J/ApJS/166/298 : Spectral cat. of bright BATSE GRBs (Kaneko+, 2006)J/ApJS/126/19 : BATSE gamma-ray burst spectral catalog. I. (Preece+, 2000)J/ApJ/446/115 : Gamma ray burst localizations (Vrba+ 1995)http://fermi.gsfc.nasa.gov/ssc/ : Fermi Science Support Center home pagehttp://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html : Fermi GBM bursthttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/754/121https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/754/121http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/754/121https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/754/121https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/754/121http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/754/121GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/754/121/table1 (Burst sample with selected parameters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/754/121/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/754/121/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/754/121/table1?GETtext/xml+votable180.050000true328.7-53.20.0055555555555555566/210 390 462 646 670 865 1040 1145 1480 1827 2315 2717 2748 2793 3038 3825 4741 4751 5065 5167 5228 5650 5719 5922 6010 6216 6348 6734 6999 7164 7364 7438 7492 7809 7890 7982 7987 8589 8617 8966 9075 9215 9230 9240 9343 9431 9498 9733 9851 9937 9984 10052 10129 10330 10762 10785 11159 11209 11563 11914 12170 12174 12227 12287 12702 12826 12893 12906 13191 13313 13559 13938 14058 14059 14248 14259 14754 15641 16049 16086 16267 16730 16781 16893 17306 17530 17633 17749 17759 17818 17904 18657 18777 18956 19072 19190 19456 19510 19530 19622 19856 20015 20077 20277 20460 20800 20970 21059 21284 21490 21537 21724 21737 21794 21816 21915 21995 22013 22181 22208 22353 22625 22838 23601 23637 23949 24113 24160 24174 24192 24227 24471 24960 25070 25552 25675 25710 26080 26084 26365 26627 26735 27086 27209 27279 27289 27352 27457 27606 27766 27800 27961 27989 28148 28164 28364 28729 28827 28856 28934 29019 29192 29376 29593 29870 30037 30237 30347 30379 30609 30893 30903 31134 31273 31727 31730 32153 32183 32273 32503 32646 32826 32936 33093 33184 33192 33230 33749 33907 33924 34449 34917 34933 35143 35200 35349 35492 35569 35572 35633 35710 35812 36134 36460 36532 36536 36654 36667 37179 37281 37294 37440 37628 37903 37935 38004 38158 38327 38362 38418 38629 39076 39214 39218 39337 39370 39506 39594 39695 39828 39969 40167 40778 41063 41112 41214 41251 41311 41394 41485 41676 42545 42665 42718 42772 43098 43106 43223 43311 43498 44202 44277 44311 44498 44630 44729 45324 45401 45437 45455 45567 45658 45731 45868 46594 46813 47031 47035 47162 47189 47201 47313 47825 48009 48314 48573 48771https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/754/121?format=asciiGamma-raydefaultJ/ApJ/754/121/table1Burst sample with selected parametersGRBGRB name (YYMMDDA) (from J/ApJS/199/18)meta.idcharF100s[0.7/100]? 95% confidence level photon flux upper limit for 100s time interval (1)phot.flux.density;em.gamma.hardfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDGRB index number (YYMMDDNNN) (corresponds to trigger name bnYYMMDDNNN)meta.id;meta.mainlongMETMission elapsed time relative to 2001 January 1, 0h:0m:0s UTCstime.intervallongRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainePos[0/102.8] Error in decimal degreesdegstat.errorfloatOAA[1.3/64.9] Off-axis angle with respect to the LAT boresightdeginstr.offsetfloatT100[0/158] T100 durationstime.durationfloatFT100[0.8/12910]? 95% confidence level photon flux upper limit for T100 time interval (1)phot.flux.density;em.gamma.hardfloatnullableF30s[2.2/275]? 95% confidence level photon flux upper limit for 30s time interval (1)phot.flux.density;em.gamma.hardfloatnullableGBMsCross-match with the IPN supplement of the GBM (Hurley et al. 2013, J/ApJS/207/39) within 5'meta.ref.urlintnullableGBMDisplay the Fermi GBM catalog data (Paciesas et al. 2012, J/ApJS/199/18)meta.numberintnullableSimbadSimbad column added by the CDSmeta.ref.urlchar