J/ApJS/277/5ivo://CDS.VizieR/J/ApJS/277/5doi:10.26093/cds/vizier/bb-8n-5CDSXie S.-L.Cai CeYu Y.-W.Xiong S.-L.Lin L.Zhao YiZhang S.-N.,Song L.-M.Wang P.Li X.-B.Xue W.-C.Zhang P.Zheng C.Zhang Y.-Q.,Liu J.-C.Wang C.-W.Tan W.-J.Wang Y.Yu Z.-H.Feng P.-Y.,Zhang J.-P.Xiao S.Zhao H.-S.Zhang W.-L.Zhang Y.-T.Huang Y.,Zhao X.-Y.Ma X.Zheng S.-J.Li X.-Q.Wen X.-Y.Gong KeAn Z.-H.,Zhang D.-L.Yang S.Liu X.-J.Zhang F.2026-03-03T20:03:11Z2026-02-16T11:36:34ZCDS support team

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

cds-question@unistra.frneutron-starsgamma-ray-astronomyMagnetars are neutron stars with ultrahigh magnetic fields (~10^14^-10^15^G). The magnetar SGR J1935+2154 is not only one of the most active magnetars detected so far, but also the unique confirmed source of fast radio bursts. The Gravitational Wave High-energy Electromagnetic Counterpart All-sky Monitor (GECAM) is dedicated to monitor gamma-ray transients all over the sky, including magnetar short bursts. Here we report the GECAM observations of the burst activity of SGR J1935+2154 from 2021 January to 2022 December, which results in a unique and valuable data set for this important magnetar. With a targeted search of GECAM data, 159 bursts from SGR J1935+2154 are detected by GECAM-B while 97 bursts are detected by GECAM-C, including the X-ray burst associated with a bright radio burst. We find that both the burst duration and the waiting time between two successive bursts follow lognormal distributions. The period of burst activity is 134+/-20 days, thus the burst activity could be generally divided into four active episodes over these two years. Interestingly, the hardness ratio of X-ray bursts tends to be softer during these two years, especially during the active episode with radio bursts detected.2025ApJS..277....5Xhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/277/5CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/212/6 : The McGill magnetar catalog (Olausen+, 2014)J/ApJ/901/L7 : NIR obs. of the magnetar 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 SGR 1935+2154 burst & persistent emission (Younes+, 2020)J/A+A/675/A99 : FRBs search with Fermi-LAT (Principe+, 2023)http://gecamweb.ihep.ac.cn/dailydatadownload.jhtml : GECAM continuous datahttp://fermi.gsfc.nasa.gov/ : NASA Fermi homepagehttp://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/ApJS/277/5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/277/5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/277/5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/277/5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/277/5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/277/5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/277/5/table2 (SGR J1935+2154 burst list observed by GECAM-B from 2021 January to 2022 December)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/277/5/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/277/5/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/277/5/table2?GETtext/xml+votable180.050000true277.914.040.005555555555555556Cone search capability for table J/ApJS/277/5/table3 (SGR J1935+2154 burst list observed by GECAM-C from 2022 October to December)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/277/5/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/277/5/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/277/5/table3?GETtext/xml+votable180.050000true311.9410.140.0055555555555555565/3241 3246 3586-3587 3593 6/12417 12444 12463 12514 12819 12839-12840 12844 12857 12862 12876-12877 12911 12921 12932 12934-12935 12937 12945 12947-12948 12953-12954 12958 12963 12969-12970 12973-12976 12978 12980 12983 12988 12990-12991 12996 12998 13000 13003 13005 13007 13014 13028 13033-13034 13038 13040 13050 13088 13097 13199 13290 14336-14337 14339 14341 14343 14352-14353 14355 14357 14360 14362 14370-14371 14381 14383 14387 14391 14393 14396 14399-14402 14410 14412 14419 14427 14439 14468-14469 14477 14480 14490 14509 14517 14528 14532 14541 14622 14662 14699 14739 14850 14882 14896 14914 14926 14982 30132 30167 30187 30332 30397 30399 30432 30435 30440 30443 30497 30500 30502 30504 30534 30560 30565 30651 30654 30662 30669 30680 30690-30691 30693 30703-30704 30706 30713 30718 31834-31835 32000 32009 32012 32019 32021 32028 32033 32046 32056 32065 32068 32077-32078 32081 32083 32086-32089 32091-32093 32104 32109 32114 32120 32123-32124 32126 32149 32211 32213 32218 32227 32238 32241 32243 32246 32248 32607https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/277/5?format=asciiGamma-raydefaultJ/ApJS/277/5/table2SGR J1935+2154 burst list observed by GECAM-B from 2021 January to 2022 DecemberrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/159] Running sequence numbermeta.id;meta.mainintTTrigger date (UTC)time.epochnullableTemplateTemplate (1)meta.id;stat.fitcharRAJ2000[275.9/312.2] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[2.2/42.4] Declination (J2000)degpos.eq.dec;meta.mainerrPos[0.15/29.7] Position uncertaintydegstat.error;posfloatsigma[5/89.2] sigma valuestat.stdev;posfloatTbb[1.9/2662] Burst duration derived by the Bayesian blocks algorithmmstime.durationfloatTst[-1051/805.01] Burst start time relative to the trigger time using the Bayesian blocks algorithmmstime.epochdoubleGBMVisible to GBMmeta.codecharGECAMVisible to GECAM (-C for Table 2 or -B for Table 3)meta.codecharJ/ApJS/277/5/table3SGR J1935+2154 burst list observed by GECAM-C from 2022 October to DecemberrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/159] Running sequence numbermeta.id;meta.mainintTTrigger date (UTC)time.epochnullableTemplateTemplate (1)meta.id;stat.fitcharRAJ2000[275.9/312.2] Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[2.2/42.4] Declination (J2000)degpos.eq.dec;meta.mainerrPos[0.15/29.7] Position uncertaintydegstat.error;posfloatsigma[5/89.2] sigma valuestat.stdev;posfloatTbb[1.9/2662] Burst duration derived by the Bayesian blocks algorithmmstime.durationfloatGBMVisible to GBMmeta.codecharTst[-1051/805.01] Burst start time relative to the trigger time using the Bayesian blocks algorithmmstime.epochdoubleGECAMVisible to GECAM (-C for Table 2 or -B for Table 3)meta.codechar