{
  "bibcode": "2004GCN..2600....1T",
  "body": "GRB040511: REM telescope robotic NIR observations.\n\nV. Testa, L.A. Antonelli (INAF-OAR), L.Calzoletti (Univ. Roma Sapienza),\nS. Covino (INAF-OAB), G. Chincarini (Univ. Milano Bicocca), F. M. Zerbi\n(INAF-OAB), E. Palazzi (IASF-CNR,Bologna), G. Tosti (Univ. Perugia),\nL. Nicastro (IASF-CNR,Palermo), on behalf of the REM collaboration report:\n\nOn May 12 the 60cm robotic telescope REM at ESO-La Silla observed the field of\nGRB040511, that was detected by HETE2 ~12 hours before, during day time at\nLa Silla. The observations were performed with the REMIR near-IR camera during\ncommissioning phase in the wide band filters J,H and Ks in fully\nautomatic mode, following a predefined sequence suited for late grb alerts.\nFrames obtained in the three filters were co-added together to obtain\nthree images per filter, having total exposure times of 60, 360 and 720s.\nThe comparison with the 2MASS catalog did not reveal evident new sources,\nwith 3 sigma upper limits, on the 720s images, of 18.6 in the J filter,\n18.2 in the H filter and 16.6 in the Ks filter. Images were calibrated by \nusing a number of 2MASS stars in the field with high S/N ratio. \nIt was not possible to observe simultaneously in the optical bands because the \noptical spectrograph ROSS was in maintenance.\n\n[GCN OPS NOTE:  This Circular was delayed 13 hours until daytime\nwhen I could register V.Testa as a new member of the list.]",
  "circularId": 2600,
  "createdOn": 1084633540000,
  "email": "testa@mporzio.astro.it",
  "subject": "GRB 040511: NIR observations with REM",
  "submitter": "Vincenzo Testa at INAF/Astro. Obs. of Rome  <testa@mporzio.astro.it>",
  "eventId": "GRB 040511"
}