{
  "bibcode": "2006GCN..5557....1W",
  "body": "K. Wiersema (University of Amsterdam) and E. Rol (University of\nLeicester) report:\n\nWe observed the position of GRB060906 (Racusin et al. GCN5528) with\nthe Danish 1.5m telescope at La Silla equipped with DFOSC.\nObservations were done under high airmass, starting on\nSeptember 8 08:06 UT and ending at 08:52 UT. In the sum of 7 x 5 min\nexposures in I band we do not detect the optical afterglow (Cenko et al.\nGCN5529). Using a sample of 23 USNO-B stars we find a 3 sigma upper limit\nof I = 21.95. The standard deviation in the zeropoint as determined\nfrom the USNO stars is 0.24 mag.",
  "circularId": 5557,
  "createdOn": 1157932389000,
  "email": "kwrsema@science.uva.nl",
  "subject": "GRB060906: Danish/DFOSC optical observations",
  "submitter": "Klaas Wiersema at GRACE/U of Amsterdam  <kwrsema@science.uva.nl>",
  "eventId": "GRB 060906"
}