J/ApJ/902/L43ivo://CDS.VizieR/J/ApJ/902/L43doi:10.26093/cds/vizier.19029043CDSLin L.Gogus E.Roberts O.J.Baring M.G.Kouveliotou C.Kaneko Y.,van der Horst A.J.Younes G.2022-06-13T11:38:13Z2022-05-16T08:01:46ZCDS support team

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

cds-question@unistra.frpulsarsgamma-ray-astronomyWe present temporal and time-integrated spectral analyses of 148 bursts from the latest activation of SGR J1935+2154, observed with the Fermi/Gamma-ray Burst Monitor from 2019-October-4 through 2020-May-20, excluding an ~130s segment with a very high burst density on 2020-April-27. The 148 bursts presented here are slightly longer and softer than bursts from earlier activations of SGR J1935+2154, as well as from other magnetars. The long-term spectral evolution trend is interpreted as being associated with an increase in the average plasma loading of the magnetosphere during bursts. We also find a trend of increased burst activity from SGR J1935+2154 since its discovery in 2014. Finally, we find no association of typical radio bursts with X-ray bursts from the source. This contrasts the association of FRB 200428 with an SGR J1935+2154 X-ray burst, which is to-date unique among the magnetar population.2020ApJ...902L..43Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/902/L43CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/212/6 : The McGill magnetar catalog (Olausen+, 2014)J/ApJS/218/11 : The 5yr Fermi/GBM magnetar burst catalog (Collazzi+, 2015)J/ApJ/901/L7 : NIR obs. of Gal. magnetar SGR 1935+215 with PGIR (De+, 2020)J/ApJ/904/L21 : NICER SGR 1935+2154 burst & persistent emission (Younes+, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/902/L43https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/902/L43http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/902/L43https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/902/L43https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/902/L43http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/902/L43GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayRadiodefaultJ/ApJ/902/L43/table1The SGR J1935+2154 burst listrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/148] Running sequence numbermeta.id;meta.mainintf_Seq[T] T = Burst triggered GBMmeta.codecharStr[2019/2020] Year of burst start time (UTC)time.epochtau-bb[0.013/2.61] Bayesian block durationstime.duration;meta.tablefloatF[0.17/189.8] Fluence in 8-200keV range1e-14J.cm**-2phot.fluence;em.gamma.hardfloate_F[0.02/0.7] Uncertainty in F1e-14J.cm**-2stat.errorfloatEpeak[13.6/56.5]? Peak energykeVphys.energy;stat.max;em.gamma.hardfloatnullablee_Epeak[0.1/10.2]? Lower uncertainty in EpeakkeVstat.errorfloatnullableE_Epeak[0.1/14]? Upper uncertainty in EpeakkeVstat.error;stat.maxfloatnullableGamma[-2.71/0.85]? Photon indexmeta.code;spect.indexfloatnullablee_Gamma[0.03/0.6]? Lower uncertainty in Gammastat.errorfloatnullableE_Gamma[0.03/0.72]? Upper uncertainty in Gammastat.error;stat.maxfloatnullableC-Stat1[71.7/640]? C-Stat for model 1 (1)stat.fit.paramfloatnullableDoF1[64/337]? Degrees of Freedom for model 1 (1)stat.fit.dofintnullablekTlow[1.9/9.8]? Low BB temperaturekeVphys.temperaturefloatnullablee_kTlow[0.15/2.6]? Lower uncertainty in kTlowkeVstat.errorfloatnullableE_kTlow[0.17/1.9]? Upper uncertainty in kTlowkeVstat.error;stat.maxfloatnullablekThigh[9.18/20.1]? High BB temperaturekeVphys.temperaturefloatnullableC-Stat2[70.7/631]? C-Stat for model 2 (2)stat.fit.paramfloatnullablee_kThigh[0.2/5.3]? Lower uncertainty in kThighkeVstat.errorfloatnullableE_kThigh[0.25/7.1]? Upper uncertainty in kThighkeVstat.error;stat.maxfloatnullableDoF2[63/336]? Degrees of Freedom for model 2 (2)stat.fit.dofintnullable