{
  "bibcode": "2009GCN..9827....1C",
  "body": "GRB 090817: Liverpool Telescope Observations\n\nZ. Cano,  I.A. Steele, C.G. Mundell,  A. Melandri, S. Kobayashi, C.J.\nMottram, R.J. Smith, D. Bersier (Liverpool JMU), A. Gomboc (U. Ljubljana),\nreport on behalf of a large collaboration:\n\nOn August 17 2009, 1.459 hours after the burst was detected, the 2-m\nLiverpool Telescope automatically began observing the INTEGRAL GRB 090817\n(Beckmann et al.,GCN Circ. 9815) using g',r' and i' filters.\n\nWe do not detect any uncatalogued source inside the Swift-XRT error circle\n(Evans et al. GCN Circ 9819).  Upper limits in stacked R and I images for\nisolated objects are 20.6 and 20.8 respectively.\n\nMagnitudes have been calibrated from the nearby USNO star (1341-0096766):\n04:15:52.314, +44:07:50.9 using R2=17.56 and I=17.04.\n\nWe note that the upper limits presented are the limits for detecting an\nisolated object in our images.  As the USNO star (1341-0096763) lies only\n1.3\" from the XRT position the actual upper limits will be accordingly\nbrighter.",
  "circularId": 9827,
  "createdOn": 1250621781000,
  "email": "zec@astro.livjm.ac.uk",
  "subject": "GRB 090817: Liverpool Telescope Observations",
  "submitter": "Zach Cano at ARI/John Moores Liverpool  <zec@astro.livjm.ac.uk>",
  "eventId": "GRB 090817"
}