{
  "bibcode": "2011GCN.12742....1K",
  "body": "Klotz A. (IRAP-CNRS-OMP), Gendre B. (ASDC/INAF-OAR),\nBoer M. (OHP-CNRS), Atteia J.L. (IRAP-CNRS-OMP) report:\n\nWe imaged the field of GRB 111228A detected by SWIFT\n(trigger 510649) with the TAROT robotic telescope (D=25cm)\nlocated at the Calern observatory, France.\n\nThe trigger occured during daytime over Calern.\nThe observations started 289 min after the GRB trigger\nThe elevation of the field increased from 7 degrees\nabove horizon and weather conditions were good.\n\nWe detect the candidate couterpart mentioned by Ukwatta et al.\n(GCNC 12737) and confirmed by Xin et al. (GCNC 12738) using\na co-addition of 10 images of 3mins. Surprisingly, the OT\nis bright R~18 (Tstart=289 min, Tend=336 min) corresponding\nto an optical decay alpha~0.3 taken TNT and TAROT data.\nWe suspect a rebrightening occured during the first minutes\nafter the trigger.\n\nNetherveless, the low elevation and the 3 arcsec/pix\nsampling of TAROT does not allow to discriminate\nthe OT from the star NOMAD1 1082-0210617 (RA=150.0646861\nDEC=+18.2997694 R=19.9). Now TAROT continues observations\nin better airmass conditions but other observations are\nencouraged.\n\nThis message may be cited.",
  "circularId": 12742,
  "createdOn": 1325108939000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 111228A: TAROT Calern observatory. OT seems still bright",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 111228A"
}