{
  "bibcode": "2023GCN.33629....1A",
  "body": "J. F. Agui Fernandez (IAA-CSIC), C. C. Thoene (ASU-CAS),\nA. de Ugarte Postigo (OCA), R. Scarpa, A. Marante and\nA. L. Cabrera Lavers (GTC, IAC) report:\n\nWe observed the afterglow of GRB 230414B (D'Ai et al. GCN\n33612; Evans et al. GCN 33613; Lipunov GCN 33614; Pankov et al.\nGCN 33615; Lu et al. GCN 33616; Raman et al. GCN 33618;\nGhosh et al. GCN 33620; Goad GCN 33621; Moskvitin et al.\nGCN 33622; Malesani et al. GCN 33623; Zhu et al. GCN 33625)\nwith OSIRIS at the 10.4m GTC telescope, at the Roque de los\nMuchachos Observatory (La Palma, Spain). Observations consisted\nof 4x1200 s spectroscopy with grism R1000B, covering the\nspectral range between 3700 and 7800 AA.\n\nIn a preliminary analysis we identify a broad absorption that we\ninterpret as due to Ly-alpha. We also see several transitions\ncoincident with SI, SiII, SiII*, OI, CII, NiII, SiIV, CIV and FeII, all of\nthem at a common redshift of z = 3.568, which we interpret as\nthe redshift of the GRB.\n\nThis GCN is in honor of the great Alex Kann, the WiseGRBguy.\nIt happened on the day he was buried while some of\nhis colleagues were standing at the grave saying farewell.\nEven the Universe paid its tribute to him.",
  "circularId": 33629,
  "createdOn": 1681560039000,
  "email": "feli@iaa.es",
  "subject": "GRB 230414B: Redshift from OSIRIS/GTC",
  "submitter": "J. F. Agui Fernandez at IAA-CSIC  <feli@iaa.es>",
  "eventId": "GRB 230414B"
}