{
  "bibcode": "2008GCN..7543....1K",
  "body": "Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report:\n\nWe complete the TAROT analysis of GRB 080330 detected by SWIFT\n(trigger 308041) at the location of the rising afterglow\ndetected by Klotz et al. (GCNC 7536). We refined the\ncoordinates (better than 1 arcsec) :\n\nRA(J2000.0) = 11h 17m 04s49\nDEC(J2000.0) +30d 37' 23\"5\n\nWe consider the date of trigger : t0 = 2008-03-30T03:41:17\n\nThe first image is trailed with a duration of 60.0s\n(see the description in Klotz et al., 2006, A&A 451, L39).\nWe do not detect the OT with a limiting magnitude of:\nt0+20.4s to t0+80.4s : R > 17.0\n\nThis limiting magnitude is compatible with the detection\nR~17.5 by ROTSE-IIIb (Schaefer et Guver GCNC 7538) at\n~t0+25s.\n\nThe later images, in tracking mode, show the afterglow.\nWe measured the alpha index considering flat flux is\nproportional to t^-alpha:\n\nt0+ 88s to t0+ 332s : alpha=-0.8 (rise)\nt0+332s to t0+ 428s : maximum of brightness R~16.8\nt0+428s to t0+1068s : alpha=+0.4 (decay)\nt0+1068s : R~17.2\n\nTwo images were taken between t0+1177s\nand t0+1363s during the dawn. They seem to show\na plateau or even a rebrightening.\nObservations are now stoped at Calern.\n\nThis message may be cited.",
  "circularId": 7543,
  "createdOn": 1206858700000,
  "email": "Alain.Klotz@free.fr",
  "subject": "GRB 080330: TAROT Calern observatory optical observations",
  "submitter": "Alain Klotz at CESR-CNRS  <Alain.Klotz@free.fr>",
  "eventId": "GRB 080330"
}