{
  "bibcode": "2004GCN..2856....1T",
  "body": "Testa V., Tosti G., Monfardini A., Covino S., Tagliaferri G.,\nChincarini G., Zerbi F., Molinari E., Di Paola A., Rodono' M.,\nAntonelli L.A., Conconi P., Cutispoto G., Nicastro L., Palazzi E.,\non behalf of the REM/ROSS team.\n\nWe imaged in the NIR and optical bands with the REM 60cm robotic\ntelescope at ESO-La Silla the central field of GRB041217, detected\nby the Swift Burst Alert Telescope (D. Palmer et al. GCN 2853). The\nobservations were carried out on 2004, December 18, from 05:28 to\n06:00 UT (i.e. 22 hours after the burst, as soon as the field was visible\nfrom the telescope site), with the REMIR near-IR camera (10x10 arcmin\nFOV, JHK filters) and with the ROSS spectrograph/imager in the\noptical (10x10 arcmin FOV, VRI filters).\n\nThe observations were carried out under good seeing conditions, but\nwith an airmass of about 2. The total exposure times were of J: 600s,\nH: 600s, K: 300s,V: 120s, R: 120s and I: 120s.\n\nThe comparison with the 2MASS catalog did not reveal new IR sources at\nthe limit of the catalog. Also the optical observations did not show any\nplausible candidates. New observation are planned for tonight.\n\nThis message is citeable.",
  "circularId": 2856,
  "createdOn": 1103382142000,
  "email": "taglia@merate.mi.astro.it",
  "subject": "GRB041217: NIR and optical observations with REM",
  "submitter": "Gianpiero Tagliaferri at OAB-INAF  <taglia@merate.mi.astro.it>",
  "eventId": "GRB 041217"
}