{
  "bibcode": "2008GCN..7813....1M",
  "body": "A. Melandri, (Liverpool JMU), A. Gomboc (U. Ljubljana), C. Guidorzi\n(INAF-OAB), R.J. Smith, I.A. Steele, D. Bersier, C.G. Mundell, D. Carter,\nS. Kobayashi, M. Burgdorf, M. Bode (Liverpool JMU), E. Rol, P. O'Brien,\nN. Bannister, N. Tanvir (U. Leicester) report:\n\n\nOn 2008 Jun 03 at 21:32:57UT we observed the Swift GRB 080603B\n(trigger=313087, Mangano et al., GCN 7794) with the Liverpool Telescope\nusing SDSS-I, SDDS-R and Bessell-B filters.\n\nThe OT reported by Rujopakarn et al. (GCN 7792), Mangano et al. (GCN\n7794), Klotz et al. (GCN 7795, 7799), Castro-Tirado et al. (GCN 7796)\nand Zhuchkov et al.(GCN 7803) is well detected in all our single 300s\nexposures.\n\nWe calibrated the afterglow magnitude using B, R and I magnitudes of few\nUSNO B1 stars in the field of view.\n\nOur observations started soon after the plateau phase reported by Klotz et\nal. (GCN 7795) and Castro-Tirado et al. (GCN 7796) but our I-band and\nR-band images were acquired before and after the optical break reported by\nZhuchkov et al.(GCN 7803).\n\nWe found alpha_I= 0.55 +/- 0.03 before the optical break and\nalpha_R= 1.03 +/- 0.02 after the break, confirming the values found by\nZhuchkov et al.(GCN 7803).",
  "circularId": 7813,
  "createdOn": 1212599630000,
  "email": "axm@astro.livjm.ac.uk",
  "subject": "GRB 080603B : Liverpool Telescope Observations",
  "submitter": "Andrea Melandri at Liverpool John Moores U  <axm@astro.livjm.ac.uk>",
  "eventId": "GRB 080603B"
}