J/ApJS/279/14ivo://CDS.VizieR/J/ApJS/279/14CDSYang J.-J.Xiao S.Wang Y.Xiong S.-L.Lin L.Jiang Z.-H.,Liao T.-L.Li X.-B.Li C.-K.Yi S.-X.Zhang Z.Zhang S.-N.2026-05-13T12:01:20Z2026-05-13T12:50:28ZCDS support team

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

cds-question@unistra.frneutron-starsx-ray-sourcesgamma-ray-astronomySGR J1935+2154 is an extremely active magnetar and the source of the first fast radio burst in the Milky Way, characterized as a magnetar X-ray burst, but whether the temporal features of this magnetar are specific or not is not well known. Based on data from the Fermi Gamma-ray Burst Monitor (GBM), Gravitational Wave High-energy Electromagnetic Counterpart All-Sky Monitor (GECAM), and Hard X-ray Modulation Telescope (HXMT), we investigate the temporal properties of pulses and bursts, covering parameters such as the minimum variability timescale (MVT), duration, rise/decay/waiting times, skewness, peakedness, pulse width, and number of pulses. Except for the number of pulses, all parameters follow the log-Gaussian distribution. In the GBM and GECAM data, MVT and duration exhibit a negative correlation, while the number of pulses and duration (or MVT) exhibit a positive (or negative) correlation. Universal power-law relationships exist among parameters, for example, rise time is positively correlated with decay time, while decay/rise time (or width) and peakedness show a negative correlation. We did not find a significant difference compared with another magnetar, SGR J0501+4516. Finally, the parameters observed by GBM and GECAM show no significant differences, but some parameters observed by HXMT differ from both, suggesting that they may originate from a different physical mechanism.2025ApJS..279...14Yhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/279/14CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/744/141 : Shapes of GRB light curves (Bhat+, 2012)J/ApJ/787/90 : Gamma-ray bursts minimum timescales (Golkhou+, 2014)J/ApJ/901/L7 : NIR obs. of SGR 1935+215 with PGIR (De+, 2020)J/ApJ/902/L43 : Fermi/GBM 2019 and 2020 bursts of SGR J1935+2154 (Lin+, 2020)J/ApJ/904/L21 : NICER SGR1935+2154 burst & persistent emission (Younes+, 2020)J/A+A/671/A112 : GRB minimum variability timescale (Camisasca+, 2023)J/ApJ/953/67 : X-ray burst associated to FRB200428 (Ge+, 2023)J/ApJS/271/19 : FGK dwarfs from LAMOST DR7 and Gaia DR3 and Kepler (Ye+, 2024)J/ApJS/277/5 : GECAM obs. of SGR J1935+2154. I. Burst catalog (Xie+, 2025)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/279/14https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/279/14http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/279/14https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/279/14https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/279/14http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/279/14GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapGamma-rayX-raydefaultJ/ApJS/279/14/table4The fitting parameters of the magnetar X-ray burst (MXB) pulses observed by different satellites from SGR J1935+2154recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSatObservatory code (1)meta.id;instr.obstycharObsUTC observation datetime.epoch;obsnullableSeq[1/28] Pulse numbermeta.id;meta.mainintRTime[0.0003/13.9] Rise timestime.epochfloatE_RTime[0.0004/29.5] Upper Uncertainty in RTimesstat.error;stat.max;time.epochfloate_RTime[0.0002/8.5] Lower uncertainty in RTimesstat.error;stat.min;time.epochfloatDTime[0/12] Decay timestime.epochdoubleE_DTime[0/33.3] Upper Uncertainty in DTimesstat.error;stat.max;time.epochdoublee_DTime[0/8.3] Lower uncertainty in DTimesstat.error;stat.min;time.epochdoublePTime[-0.5/0.98] Peak timestime.epochfloatE_PTime[0.0001/0.1] Upper Uncertainty in PTimesstat.error;stat.max;time.epochfloate_PTime[0.0001/0.07] Lower uncertainty in PTimesstat.error;stat.min;time.epochfloatSkew[0.002/49] Skewnessstat.fit.paramfloatE_Skew[0.004/34] Upper Uncertainty in Skewstat.error;stat.max;stat.fit.paramfloate_Skew[0.001/38] Lower uncertainty in Skewstat.error;stat.min;stat.fit.paramfloatPeak[0.07/6.2] Peakednessstat.fit.paramfloatE_Peak[0.04/5.5] Upper Uncertainty in Peakstat.error;stat.max;stat.fit.paramfloate_Peak[0.04/3.8] Lower uncertainty in Peakstat.error;stat.min;stat.fit.paramfloatDur[0.01/1.4] Durationstime.durationfloatMVT[0/0.3] Minimum Variability Timescalestime.scale;src.var;stat.minfloatE_MVT[0.0002/0.2] Upper Uncertainty in MVTsstat.error;stat.max;time.scalefloate_MVT[0/0.1] Lower uncertainty in MVTsstat.error;stat.min;time.scalefloat