{
  "bibcode": "2006GCN..4971....1N",
  "body": "M. Nysewander, K. Ivarsen, A. Foster, D. Reichart, J. Haislip, A. LaCluyze,\nA. Trotter, J. A. Crain, J. Kirschbrown, and C. MacLeod report on behalf of\nthe UNC team of the FUN GRB Collaboration:\n\nSkynet observed the localization of GRB 060418 (Falcone et al., GCN 4966)\nwith one of the 16-inch PROMPT telescopes at CTIO beginning 40 sec after\nthe burst (15 sec after notification).  We weakly detect the afterglow\n(Falcone et al., GCN 4966) at z = 15.3 +/- 0.3 mag (calibrated to three\nUSNO-B1.0/NOMAD stars) in a 5-sec exposure taken at this time.\n\nObservations were then interrupted until about 16 minutes after the burst\ndue to an unfortunately scheduled operating system update.\n\nSkynet resumed observations with three of the PROMPT telescopes in Ugriz\n(three simultaneously), with clear detections in 80-sec griz exposures.\n\nAt 16.6 minutes after the burst, we measure z = 14.44 +/- 0.02 mag,\nimplying a brightening of the afterglow at early times.  At 1.3 hours after\nthe burst, we measure z = 16.2 +/- 0.1 mag.  If fading as a power law\nbetween these times, this implies a temporal index of about -1.1.\n\nPROMPT is currently being built and commissioned.",
  "circularId": 4971,
  "createdOn": 1145340355000,
  "email": "mnysewan@physics.unc.edu",
  "subject": "GRB 060418: PROMPT Detections",
  "submitter": "Melissa Nysewander at UNC,Chapel Hill  <mnysewan@physics.unc.edu>",
  "eventId": "GRB 060418"
}