{
  "bibcode": "2011GCN.12746....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 continue to obtain images of the field of GRB 111228A detected\nby SWIFT (trigger 510649) with the TAROT robotic telescope (D=25cm)\nlocated at the Calern observatory, France (cf. GCNC 12742).\n\nWe confirm the OT observed by TAROT is not the galaxy\nmentioned by Guver (GCNC 12741) neither the object\nreferenced as NOMAD1 1082-0210617 (Klotz GCNC 12742).\nThe OT observed by TAROT is the afterglow of GRB 111228A\nand lies 9 arcsec eastern from these objects.\n\nAs we previously announced (GCNC 12742), we confirm that\nthe OT of GRB 111228A is brighter than a simple extrapolation\nof the very early observations using a standard decay.\nCurrent TAROT observations show that the decay is stopped.\n\nUnfiltered TAROT images were co-added\nto obtain a temporal series that shows clearly that\nthe brightness remains almost constant since the beginning\nof the TAROT observations.\n\nPhotometry is relative to the star NOMAD1 1083-0203467\n(RA=150.0946028 DEC=+18.3231806 J2000) R=17.28 (V-R)=+0.69.\n\n  Tstart   Tend   Rmag OT\n    (min)  (min)\n     289    318   18.6 +/- 0.4\n     321    352   18.9 +/- 0.4\n     358    389   18.5 +/- 0.3\n     392    421   18.7 +/- 0.3\n     429    459   18.7 +/- 0.3\n     462    492   18.9 +/- 0.3\n\nThis message may be cited.",
  "circularId": 12746,
  "createdOn": 1325117699000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 111228A: TAROT Calern observatory. OT decay stopped",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 111228A"
}