{
  "bibcode": "2012GCN.13277....1M",
  "body": "D. Malesani (DARK/NBI), S. Schulze (Univ. Iceland), T. Kruehler, J. P. U.\nFynbo, J. Hjorth, B. Milvang-Jensen, D. Watson (DARK/NBI), A. de Ugarte Postigo\n(IAA/CSIC and DARK/NBI), N. R. Tanvir (Univ.  Leicester), G. Tagliaferri\n(INAF-OAB), G. Leloudas, J. Sollerman (OKC, Stockholm), D. Xu (WIS, Israel), M.\nD. Stritzinger (IFA, Aarhus), A. De Cia (Univ. Iceland) report on behalf of the\nX-shooter GRB GTO collaboration:\n\nWe observed the re-brightened optical counterpart of GRB 120422A (Troja et al.,\nGCN 13243; Cucchiara et al., GCN 13245; Malesani et al., GCN 13275) with the\nESO VLT equipped with the X-shooter spectrograph. Observations started on 2012\nMay 1.0 UT (8.7 days after the GRB), for a total exposure time of 80 min in\neach of the UVB, VIS, and NIR arms, covering the wavelength range 3000-25000\nA. The slit was aligned to cover both the galaxy at z = 0.28 present in\nthe SDSS (Cucchiara et al., GCN 13245; Tanvir et al., GCN 13251) and the\noptical counterpart (Cucchiara et al., GCN 13245).\n\nThe spectrum exibits a broad emission peak centred at 6300 A similar to the\nprevious report based on a Keck spectrum taken on April 27 (Perley et al., GCN\n13267). Blueward of the peak the spectrum drops steeply down to around 4000 A\nand beyond that we do not detect flux. Over the full covered spectral range\nthe spectrum bears a good resemblance with spectra of SN 1998bw, associated\nwith GRB 980425, about 6 days before maximum (Patat et al. 2001, ApJ, 555,\n900).\n\nWe acknowledge the excellent support of the ESO observing staff, in particular\nClaudio Melo, Giacomo Beccari, Marcelo Lopez and Ivo Saviane. We also thank\nthe visiting astronomer Luca Sbordone for allowing us to observe the event.",
  "circularId": 13277,
  "createdOn": 1335882606000,
  "email": "milvang@astro.ku.dk",
  "subject": "GRB 120422A: VLT/X-shooter spectroscopic evidence for a SN",
  "submitter": "Bo Milvang-Jensen at Dark Cosmology Centre,NBI,U. Copenhagen  <milvang@astro.ku.dk>",
  "eventId": "GRB 120422A"
}