{
  "bibcode": "2011GCN.11613....1L",
  "body": "Laas-Bourez M. (UWA/ICRAR), Gendre B. (ASDC), Atteia J.L. (IRAP-OMP),\nKlotz A. (IRAP-OMP), and Boer M. (OHP-OAMP)  report:\n\nfollowing the detection of the optical afterglow by de Ugarte Postigo  \net al. (GCN 11605), we re-analyzed the TAROT data reported in Klotz et  \nal. (GCN 11604). At the position of the afterglow, an object is  \nmarginally detected (2.6 sigma confidence level) within the stack of  \nthe first two images (73.7s -> 178.6s), with R = 18.0. A stack of the  \nfollowing 4 images (193.7s -> 359.2s) gave only an upper limit of R <  \n18.7.\n\nCombined with the NOT observation, this gives an optical decay index  \nof at least 1.6 during the initial part of the light curve, that could  \nindicate the presence of a reverse shock.\n\nMagnitudes were estimated with the nearby USNO-B1 stars\nand are not corrected for galactic dust extinction.\n\nThis message can be cited\n\n----------------------------------------------------------------\nThis message was sent using IMP, the Internet Messaging Program.",
  "circularId": 11613,
  "createdOn": 1296229753000,
  "email": "bruce.gendre@asdc.asi.it",
  "subject": "GRB 110128A: TAROT-Calern refined analysis",
  "submitter": "Bruce Gendre at ASDC  <bruce.gendre@asdc.asi.it>",
  "eventId": "GRB 110128A"
}