{
  "bibcode": "2006GCN..5180....1C",
  "body": "B. E. Cobb (Yale), part of the larger SMARTS consortium, reports:\n\nUsing the ANDICAM instrument on the 1.3m telescope at CTIO, we\nobtained optical/IR imaging of the error region of GRB 060526\n(GCN 5162, Campana et al.) with a mid-exposure time of\n2006-05-27 01:13 UT (~8.7 hours post-burst) and\nagain at 2006-05-27 04:07 UT (~11.6 hours post-burst).\nTotal summed exposure times for each observation amounted\nto 36 minutes in I and 30 minutes in J.\n\nThe afterglow of GRB 060526 is visible in each combine image.\nThe preliminary magnitudes reported below were calibrated using\nseveral USNO-B1.0 stars in the I-band and two 2MASS standards in J.\n[The errors on the photometric calibration are ~0.2 in I and ~0.02\nin J; these errors are in addition to the statistical errors listed\nbelow.]\n\ntime\npost-burst      I magnitude             J magnitude\n------------------------------------------------------\n 8.7 hours      18.99 +/- 0.02          18.16 +/- 0.06\n11.6 hours      19.31 +/- 0.02          18.58 +/- 0.07\n\n\nThe afterglow decay index is constrained by our observations to be\nalpha = 1.2 +/- 0.2 from 8.7 to 11.6 hours post-burst.  This\nvalue is in agreement with the decay value from 5 to 16 hours\npost-burst reported by Khamitov et al. (GCN 5173)\nand Halpern et al. (GCN 5176).",
  "circularId": 5180,
  "createdOn": 1148843484000,
  "email": "cobb@astro.yale.edu",
  "subject": "GRB 060526: SMARTS optical/IR afterglow observations",
  "submitter": "Bethany Cobb at Yale U  <cobb@astro.yale.edu>",
  "eventId": "GRB 060526"
}