{
  "bibcode": "2005GCN..3101....1K",
  "body": "Dan Kelson and Edo Berger (Carnegie Observatories) report:\n\n\"Using LDSS3 on Magellan we also obtained a 20-minute spectrum of the\nafterglow candidate (GCN 3100).  We find several absorption features which\nwe identify as AlIII (1854.7 and 1862.8) and SiII (1808.0) at a redshift\nof z=1.949.  We conclude that this is the redshift of GRB 050315.\n\nGiven a fluence of >2.8e-6 erg/cm^2 (GCN 3099), the isotropic-equivalent\ngamma-ray energy is > 2.6e52 erg.\"",
  "circularId": 3101,
  "createdOn": 1110967074000,
  "email": "eberger@ociw.edu",
  "subject": "GRB 050315: Absorption redshift",
  "submitter": "Edo Berger at Carnegie Obs  <eberger@ociw.edu>",
  "eventId": "GRB 050315"
}