{
  "bibcode": "2016GCN.18966....1D",
  "body": "A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C.C. Thoene (IAA-CSIC), \nR. Sanchez-Ramirez (IAA-CSIC), Gabriel Gomez Velarde (GRANTECAN) and\nVictor Herrera (GRANTECAN) report on behalf of a larger collaboration:\n\nWe observed the afterglow of GRB 160131A (Page et al. GCN 18951) with \nthe 10.4 m GTC equipped with OSIRIS. Observations consisted of 3x600s \nspectra with grism R1000B (covering from 3700 to 7800 AA) and 3x600s \nwith grism R1000R (covering from 5100 to 10000 AA). The first spectrum \nstarted at 21:52 UT (13.53 hr after the GRB onset) under very bad seeing \nconditions (> 3\").\n\nIn spite of the poor seeing we detect a strong continuum across the complete\nrange with multiple absorption features of FeII, NiII, MnII, MgII, MgI, and CaII \nat a common redshift of 0.972, consistent with the value measured by \nMalesani et al. from TNG (GCN 18965).\n\n[GCN OPS NOTE(04feb16): Per author's request, GGV and VH were added \nto the author list.]",
  "circularId": 18966,
  "createdOn": 1454284182000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 160131A: GTC spectroscopy of the afterglow",
  "submitter": "Antonio de Ugarte Postigo at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 160131A"
}