{
  "bibcode": "2001GCN..1204....1H",
  "body": "GRB 011211: Evidence for an Optical Break\n\nS. Holland (Notre Dame), P. Berlind, D. Bersier, S. Jha, K. Z. Stanek\n(Harvard-Smithsonian Center for Astrophysics), I. Soszynski (Warsaw\nUniversity Observatory), P. M. Garnavich (Notre Dame) report:\n\n     We have obtained deep VRI images of the field containing GRB\n011211 using the 1.2-meter telescope with the 4Shooter at the Fred\nLawrence Whipple Observatory on Dec. 14.5 UT.  The optical afterglow\nof GRB 011211 is not visible on any of our images.  The predicted\nmagnitudes, based on the power-law fits of Soszynski et al. (2001, GCN\n1199), and the estimated limiting magnitudes of our images are give\nbelow.\n\n     Filter  Predicted  Limiting Magnitude\n        V      22.10       22.3 +/- 0.2\n        R      21.99       22.4 +/- 0.2\n        I      21.25       21.0 +/- 0.2\n\nThese magnitudes are relative to the VRI magnitudes for USNO star\nU0675_11427359 given by Henden (2001, GCN 1197).\n\n     Our non-detection suggests that there has been a break in the\nlight curve of the optical afterglow of GRB 011211.  The break\noccurred between 1.5 and 2.7 days after the burst (between Dec. 13.3\nand Dec. 14.5).  The R-band limiting magnitude suggests that the slope\nafter the break is at least -1.4.  The V- and I-band limiting\nmagnitudes are consistent with no break.\n\nThis message may be cited.",
  "circularId": 1204,
  "createdOn": 1008367768000,
  "email": "sholland@nd.edu",
  "subject": "GRB 011211: Evidence for an Optical Break",
  "submitter": "Stephen Holland at U. of Notre Dame  <sholland@nd.edu>",
  "eventId": "GRB 011211"
}