{
  "bibcode": "2025GCN.42334....1B",
  "body": "A. Bochenek and D. A. Perley (LJMU) report:\n\n \n\nWe observed the field of GRB 251013C (Fermi GBM team, GCN 42221; Rakotondrainibe et al., GCN 42222) using the IO:O optical camera on the 2m robotic Liverpool Telescope. We obtained 60s exposures in the SDSS ugriz filters, starting on 2025-10-14 01:46:49, about 8.1h after Fermi trigger.\n\n \n\nWe report detections in all bands, at the position of the optical afterglow first reported by Palmerio et al., GCN 42223:\n\n \n\nMJD (start)         T_mid-T_0        Filter       Mag. (AB)\n\n60962.07711        8.20 h              u     19.07 ± 0.10\n\n60962.07418        8.13 h              g     18.62 ± 0.04\n\n60962.07517        8.15 h              r     18.36 ± 0.02\n\n60962.07614        8.17 h              i     18.14 ± 0.03\n\n60962.07877        8.24 h              z     18.00 ± 0.03\n\n \n\nThe photometry for griz filters was calibrated using nearby PanSTARRS secondary standards, while u-band photometry was calibrated using the SDSS catalogue. The photometry is not corrected for extinction. ",
  "submittedHow": "web",
  "format": "text/plain",
  "subject": "GRB 251013C: Liverpool Telescope observations",
  "submitter": "A. Bochenek at Liverpool John Moores University <a.m.bochenek@2023.ljmu.ac.uk>",
  "circularId": 42334,
  "createdOn": 1760735034101,
  "eventId": "GRB 251013C"
}