{
  "bibcode": "2006GCN..4566....1M",
  "body": "A. Monfardini, A. Melandri, C. Guidorzi, C.G. Mundell, A. Gomboc,\nI.A. Steele (Liverpool JMU) on behalf of the Liverpool GRB group report:\n\n \"On Jan 21.968 UT and Jan 22.035 UT the Liverpool Telescope imaged the\n field of GRB060121 (HETE alert 4010, Arimoto et al., GCN 4550;\n Prigozhin et al. GCN 4551), beginning at 0.83 and 2.44 hours after the\n GRB, respectively. Images were taken with r', i' and z' filters.\n\n The SXC error circle (Prigozhin et al. GCN 4551) was partially covered\n (about 50%) during the first hour of observations. In the second hour\n it was entirely inside the Liverpool Telescope 4.6 arcmin field of\n view, as was the Swift-XRT error circle provided by Mangano et\n al. (GCN 4560).\n\n The optical counterpart suggested by Malesani et al. (GCN 4561) and\n Levan et al. (GCN 4562) is not detected in our images. Manual\n inspection reveals no afterglow candidate down to a magnitude limit of\n r'> 22.5, i'> 22.2 and z'> 21.6 at approximately 2.7 hours after the\n burst. The limits are determined by comparison with SDSS pre-burst\n photometry.\n\n This message can be cited\"",
  "circularId": 4566,
  "createdOn": 1138014054000,
  "email": "cgm@astro.livjm.ac.uk",
  "eventId": "GRB 060121",
  "subject": "GRB 060121: Liverpool Telescopes optical limits",
  "submitter": "Carole Mundell at ARI, JMU,Liverpool  <cgm@astro.livjm.ac.uk>"
}