{
  "bibcode": "2009GCN.10233....1T",
  "body": "C.C. Thoene (INAF-OAB), P. Goldoni (APC/Univ. Paris 7 and SAp/CEA)\nS. Covino (INAF-OAB), L.A. Antonelli (INAF-OAR), D. Malesani, J.P.U.\nFynbo (DARK/NBI), A.J. Levan (U. Warwick), P. Jakobsson (U. Iceland),\nH. Flores (Paris Obs.), B. Milvang-Jensen, J. Hjorth, D. Watson (DARK/NBI),\nK. Wiersema, N. R. Tanvir (Univ. Leicester), A. de Ugarte Postigo\n(INAF-OAB) report on behalf of the X-shooter GRB collaboration:\n\nWe observed the afterglow of GRB 091127 (Troja et al. GCN 10191, Smith\net al. GCN 10192) with X-shooter at the VLT starting at 03:17 UT on\nDec 2, 2009. The observation consisted of  4x1500s exposures,  with a\nmean epoch 4.2 days after the burst when the magnitude of the\nafterglow was R ~ 21 mag (Haislip et al. GCN 10230). We detect the\ncontinuum in the range from 3400 to 24800 Angstrom. The S/N in the blue\npart of the spectrum is low due to the effect of the nearby Moon.\n\nIn a preliminary analysis using an archival wavelength calibration we\ndetect several emission features superimposed on the afterglow\ncontinuum, namely [OII] (3727, 3729), H-beta (4863), [OIII]  (4960,\n5007) and H-alpha (6563) at a common redshift of 0.49034 +/- 0.00018.\nThis redshift is consistent with the observations reported by\nCucchiara et al. (GCN 10202). We do not detect any obvious absorption\nfeatures at that redshift.\n\nWe thank the ESO observing staff, in particular H. Korhonen and S. Stefl.",
  "circularId": 10233,
  "createdOn": 1259797277000,
  "email": "deugarte@iaa.es",
  "subject": "GRB 091127: redshift confirmation with X-shooter",
  "submitter": "Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>",
  "eventId": "GRB 091127"
}