TITLE: GCN CIRCULAR NUMBER: 9827 SUBJECT: GRB 090817: Liverpool Telescope Observations DATE: 09/08/18 18:56:21 GMT FROM: Zach Cano at ARI/John Moores Liverpool GRB 090817: Liverpool Telescope Observations Z. Cano, I.A. Steele, C.G. Mundell, A. Melandri, S. Kobayashi, C.J. Mottram, R.J. Smith, D. Bersier (Liverpool JMU), A. Gomboc (U. Ljubljana), report on behalf of a large collaboration: On August 17 2009, 1.459 hours after the burst was detected, the 2-m Liverpool Telescope automatically began observing the INTEGRAL GRB 090817 (Beckmann et al.,GCN Circ. 9815) using g',r' and i' filters. We do not detect any uncatalogued source inside the Swift-XRT error circle (Evans et al. GCN Circ 9819). Upper limits in stacked R and I images for isolated objects are 20.6 and 20.8 respectively. Magnitudes have been calibrated from the nearby USNO star (1341-0096766): 04:15:52.314, +44:07:50.9 using R2=17.56 and I=17.04. We note that the upper limits presented are the limits for detecting an isolated object in our images. As the USNO star (1341-0096763) lies only 1.3" from the XRT position the actual upper limits will be accordingly brighter.