{
  "bibcode": "2006GCN..5147....1D",
  "body": "X. Dai and K. Z. Stanek (Ohio State Univ.)\n\nWe analyzed the Swift-XRT light curve of GRB 060210 (Beardmore et al. 2006\nGCN 4724).  We added new data points to the X-ray light curve presented in \nStanek et al. 2006 (astro-ph/0602495 v1) up to 1.e6 sec after \nthe BAT trigger.  We detected a smooth jet break (t_j = 7.9^{+2.2}_{-1.6}\nhr, observed) with the extended XRT light curve.\n\nWe fitted both a single power-law and a broken power-law model to the XRT \nlight curve from 3.e3 sec to 1.e6 sec after the BAT trigger.  For the \nsingle power-law model we found alpha=1.09 and chi^2(dof) = 292.3(69). \nFor the broken power-law model we found alpha1 = 0.7, alpha2 = 1.4, t_j = \n7.9 hr, and chi^2(dof) = 64.8(67).  We note that the power-law decay index \nfor the X-ray light curve before the jet break (alpha1 ~ 0.7) is not \nconsistent with the optical index (alpha_o ~ 1.3, Stanek et al. 2006 \nastro-ph/0602495).  The XRT light curve for GRB 060210 is at \nhttp://www.astronomy.ohio-state.edu/~xinyu/grb/060210.jpg\n\nThis message may be cited.",
  "circularId": 5147,
  "createdOn": 1147913956000,
  "email": "xinyu@astronomy.ohio-state.edu",
  "subject": "GRB 060210: Jet Break in the XRT light curve",
  "submitter": "Xinyu Dai at Ohio State U  <xinyu@astronomy.ohio-state.edu>",
  "eventId": "GRB 060210"
}