{
  "bibcode": "2016GCN.20245....1C",
  "body": "���Z. Cano (IAA-CSIC), D. Malesani (DARK/NBI and DTU Space), A. de Ugarte\nPostigo (IAA-CSIC, DARK/NBI), L. Izzo, C. C. Thoene (IAA-CSIC) and N.\nCastro-Rodriguez (GRANTECAN/IAC/Universidad de La Laguna) report:\n\nWe observed the field of GRB 161129A (Kocevski et al., GCN Circ. 20210)\nwith OSIRIS on the 10.4 m GTC telescope on La Palma (Spain).  The\nobservations started at 19:46:40.9 UT on 05-December-2016 (6.52 days after\nthe burst), which consisted of 4 x 1200 s spectra using grism R1000B, which\ncovers the wavelength range 3700-7800 angstroms, with a resolution of\nR~1000.\n\nWithin the enhanced XRT error region (Beardmore et al. 2016, GCN Circ.\n20211) we note the presence of sources A & B detected by Heintz et al. (GCN\nCirc. 20244).  The spectrum of the extended object (source B) shows a\ncontinuum with a strong emission line that we attribute to the [OII]\n3727/3729 doublet at z=0.645, as well as weaker emission lines consistent\nwith being H-gamma and H-delta at the same redshift. We propose this\nstar-forming galaxy to be the host of GRB 161129A. The spectrum of source A\ndisplays absorption features of Ca II K and H, Mg I and MgH at z~0,\nconfirming it is a foreground star and not related to GRB 161129A.",
  "circularId": 20245,
  "createdOn": 1481297497000,
  "email": "zewcano@gmail.com",
  "subject": "GRB 161129A: GTC redshift of the likely host galaxy",
  "submitter": "Zach Cano at U of Iceland  <zewcano@gmail.com>",
  "eventId": "GRB 161129A"
}