{
  "bibcode": "2010GCN.10466....1C",
  "body": "R. Chornock (Harvard), A. Cucchiara, D. Fox (Penn St.), and E. Berger (Harvard)\nreport on behalf of a larger collaboration:\n\nFurther analysis of the Gemini-North GMOS spectrum of the afterglow (Huang et\nal., GCN 10461) of GRB 100302A (Cummings et al., GCN 10458) described in GCN\n10465 (Cucchiara et al.) reveals that the afterglow shows a sharp increase in\ncontinuum flux redward of 7100 Angs, with only a weak continuum detected between\n5500 and 7000 Angs, consistent with absorption by H I at z~4.8.\nThere are several narrow absorption features superposed on the noisy red\ncontinuum, consistent with N V, Si II, Si II*, and C II at a mean redshift of\n4.813, which we identify as the redshift of this burst.",
  "circularId": 10466,
  "createdOn": 1267634283000,
  "email": "chornock@astro.berkeley.edu",
  "subject": "GRB 100302A: Gemini-North redshift",
  "submitter": "Ryan Chornock at UC Berkeley  <chornock@astro.berkeley.edu>",
  "eventId": "GRB 100302A"
}