{
  "bibcode": "2006GCN..4592....1C",
  "body": "S. B. Cenko (Caltech), E. Berger (Carnegie Observatories) and J. Cohen\n(Caltech) report on behalf of a larger collaboration:\n\n\"We obtained two 1800 sec spectra of GRB 060124 (Holland et al., GCN 4570)\nwith the Echellette Spectrograph and Imager (ESI) on the Keck 10-m\ntelescope starting on 2006 Jan. 25.23 UT.  We detect the broad absorption\nfeature detected by Mirabal and Halpern (GCN 4591), which is clearly a\ndoublet, and identify it as CIV 1548,1550 at z=2.297.  We also detect the\nMgII 2796,2803 at the same redshift.  At this redshift and given a\nfluence of about 7e-6 erg/cm^2 (Fenimore et al., GCN 4586) we find an\nisotropic-equivalent gamma-ray energy of 8.9e52 erg.\"",
  "circularId": 4592,
  "createdOn": 1138182011000,
  "email": "cenko@srl.caltech.edu",
  "subject": "GRB 060124: Keck Absorption Redshift",
  "submitter": "S. Bradley Cenko at Caltech  <cenko@srl.caltech.edu>",
  "eventId": "GRB 060124"
}