{
  "bibcode": "2005GCN..4032....1P",
  "body": "S. Piranomonte (INAF/OAR), A. Magazzu (TNG), G. Mainella (TNG),\nF. Fiore (INAF/OAR), S. Covino (INAF/OABr), D. Fugazza (INAF/OABr),\nA. Antonelli (INAF/OAR), G. Israel (INAF/OAR), G. Chincarini (Univ. Milano-Bicocca),\nD. Malesani (SISSA), , F. Mannucci (INAF/Arcetri), G. Tagliaferri (INAF/OABr),\nand L. Stella (INAF/OAR) on behalf of the CIBO collaboration, report:\n\nStarting on September 22 21:17:35 UT (about 82 min after the GRB\ntrigger) we have obtained low resolution spectra \nof the optical afterglow of GRB050922C (Rykoff et al. \nGCN#4012). The observations consisted of 5 exposures for 300 sec each with\nDOLORES@TNG, using grism LR-B, with a 1\" slit. This set-up provides\na resolution of about 5 angstrom.\n\nAt the time of the observations the afterglow magnitude varied between  \nR~16.7 and R=17.7. \n\nA preliminary analysis of the data confirms a very rich spectrum\n(see Jakobsson et al. GCN#4017, GCN#4029).\nWe detect strong  Lyalpha, SiII1304, CII1334, SiIV1393, SiII1526,\nCIV1548,1550, AlII1670, SiII1808 absorption lines at z=2.198+/-0.001,\nWe also confirm the  strong Lyalpha absorption at z=2.07.\n\nA full analysis is underway.\n\nWe thank the TNG staff for the excellent support in performing these\nobservations.\n\nThis message can be quoted.",
  "circularId": 4032,
  "createdOn": 1127497061000,
  "email": "piranomonte@mporzio.astro.it",
  "subject": "GRB050922C: TNG spectroscopic observations",
  "submitter": "Silvia Piranomonte at OAR  <piranomonte@mporzio.astro.it>",
  "eventId": "GRB 050922C"
}