{
  "bibcode": "2008GCN..8300....1C",
  "body": "A. Cucchiara, D. B. Fox (Penn State), S. B. Cenko  (Berkeley) and E. Berger\n(Harvard) report on behalf of a larger collaboration:\n\nStarting at 06:54 UT on 2008 September 29 (T0+16h) we observed the optical\ncounterpart of GRB 080928 (Sakamoto et al., GCN 8292, Rykoff  et al., \nGCN 8293)\nusing Gemini-South with the GMOS-South spectrograph (R~1200).\nWe acquired 2x900s spectra which covered the wavelength range 4000A-8000A.\n\nOur spectrum shows a flux cut-off blueward of 4500A indicating a likely DLA\nassociated with the GRB host galaxy, consistent with a redshift of z ~ 2.6.\n\nWe also identify multiple metal absorption features including FeII(2249),\nFeII(2260), SiIV(1393), SiIV(1402), CIV(1548), CIV(1550), NiII(1741) and\nNiII(1751) at a common redshift of z = 2.49.\n\nTherefore we conclude that GRB080928 occurred in a possible DLA galaxy\nat z = 2.49.\n\nWe thank the Gemini staff for conducting these observations.\n\n[GCN OPS NOTE(29sep08): Per author's request, the affiliation for EB\nwas corrected to Harvard.]",
  "circularId": 8300,
  "createdOn": 1222702293000,
  "email": "cucchiara@astro.psu.edu",
  "subject": "GRB080928: Gemini-South Absorption Redshift",
  "submitter": "Antonino Cucchiara at PSU  <cucchiara@astro.psu.edu>",
  "eventId": "GRB 080928"
}