{
  "bibcode": "2009GCN..8871....1D",
  "body": "P. D'Avanzo, C. C. Thoene, D. Fugazza (INAF-OAB), V. D'Elia, S. \nPiranomonte (INAF-OAR), R. Salvaterra, S. Covino, S. Campana (INAF-OAB), \nG. Chincarini (Univ. Bicocca) report, on behalf of the MISTICI \ncollaboration:\n\nWe continued observing the field of GRB 090201 (Oates et a., GCN 8865) \nwith the ESO-VLT in imaging mode with the ISAAC NIR camera. Observations \nwere carried out in J, H and K-band about 9.5 hours after the burst.\n\nThe optical afterglow candidate (D'Avanzo et al. GCN 8869) is not \nvisible in the coadded images down to the following upper limits (3sigma \nc.l.): J = 23.0, H = 22.4, K = 21.1 (calibrated against the 2MASS \ncatalogue).\n\nThe absence of a NIR detection suggests that the object observed by \nD'Avanzo et al. (GCN 8869) is not the optical afterglow of GRB 090201 \nbut probably a field galaxy. Further analysis is in progress.\n\nWe acknowledge the VLT staff for their support, in particular E. Valenti \nand J. Smoker.",
  "circularId": 8871,
  "createdOn": 1233550315000,
  "email": "paolo.davanzo@brera.inaf.it",
  "subject": "GRB 090201: VLT NIR observations",
  "submitter": "Paolo D'Avanzo at INAF-OAB  <paolo.davanzo@brera.inaf.it>",
  "eventId": "GRB 090201"
}