{
  "bibcode": "2006GCN..4583....1P",
  "body": "Content-Type: text/plain; charset=ISO-8859-1; format=flowed\nContent-Transfer-Encoding: 7bit\n\nS. Piranomonte, V. D'Elia, P. D'Avanzo, D. Malesani, A. Grazian, D. \nFugazza, L.A. Antonelli, S. Campana, G. Chincarini, S. Covino, M. Della \nValle, A. Fernandez-Soto, F. Fiore, L. Stella, G. Tagliaferri, and V. \nTesta, report on  behalf of the MISTICI collaboration:\n\n\"We have performed a more detailed analysis of our optical/NIR \nphotometry (D'Avanzo et al., GCN 4532; Malesani et al., GCN 4541; \nGrazian et al. GCN 4545) of the afterglow of GRB 060116 (Campana et al., \nGCN 4519, 4522; Kocevski et al., GCN 4528, 4540).\n\nWe compared the available photometry with a power law afterglow, \nincluding rest frame dust extinction. The chi square versus z curve \npresents two minima. The lowest chi square corresponds to the solution \nwith z~6.6 and little rest-frame extinction as reported in GCN 4545. The \nother minimum corresponds to a solution with z=3.8-4.5 (1 sigma \nconfidence level) and E(B-V)~0.5.\n\nOn 2005 January 19, starting at 01:19 UT (about 2.7 days after the GRB), \nwe  obtained low resolution spectra of the afterglow of GRB 060116 \n(Kocevski et al. GCNs 4528, 4540) using VLT+FORS2. The observation \nconsisted of 10 exposures of 1800 seconds each using the grism 300I with \na 1\" slit under good seeing conditions.  A very faint object, close to \nthe detection limit, is visible at the afterglow position in the \ncombined spectrum. Its spectrum may extend down to about 7000 Angstrom \nblueward. This would be consistent with the lower redshift reported \nabove. However, the statistics is very poor and a robust conclusion can \nnot be drawn at this time. Further analysis is in progress.\n\nWe acknowledge the efficient support of the ESO staff at Paranal.\n\nThis message can be cited.\"",
  "circularId": 4583,
  "createdOn": 1138139137000,
  "email": "malesani@sissa.it",
  "subject": "GRB 060116: Further analysis of VLT photometry and optical spectroscopy",
  "submitter": "Daniele Malesani at SISSA-ISAS,Trieste,Italy  <malesani@sissa.it>",
  "eventId": "GRB 060116"
}