{
  "bibcode": "2021GCN.29823....1A",
  "body": "Y. Aimuratov, C.L. Bianco, L. Li, R. Moradi, F. Rastegar Nia, J.A. Rueda,\nR. Ruffini,  N. Sahakyan, Y. Wang, S.S. Xue on behalf of the ICRANet team,\nreport:\n\nGRB 210411C (trigger=1042398) with a redshift z=2.826 (A. de Ugarte Postigo\net al, 2021, GCN29806) was triggered and located by Swift Burst Alert\nTelescope (BAT) (T. Sbarrato et al, 2021, GCN 29794) with T90=12.8 sec in\n15-150 keV (C. B. Markwardt et al, 2021, GCN29810).\n\nThe corresponding luminosity light curves of Swift-BAT and Swift-XRT (J.D.\nGropp et al, 2021, GCN29807) show this source is a twin of GRB 190114C\n(Ruffini et al, 2021, https://doi.org/10.1093/mnras/stab724). A new\nadditional feature is identified in the early luminosity of Swift-XRT data\nof GRB 210411C (see enclosed Fig.1).\n\nWe recommend to check for the possible existence of a yet unobserved GeV\nradiation and to follow up the late keV and possible GeV temporal power-law\nluminosities.\n\nFig. 1:\nhttp://www.icranet.org/documents/Swift_GRB210411C-Fermi_GRB190114C.pdf",
  "circularId": 29823,
  "createdOn": 1618588033000,
  "email": "ruffini@icra.it",
  "subject": "GRB 210411C: A very significant early X-ray afterglow",
  "submitter": "Remo Rufinni at ICRA  <ruffini@icra.it>",
  "eventId": "GRB 210411C"
}