{
  "submitter": "Simon de Wet at University of Cape Town <simdewet@gmail.com>",
  "body": "S. de Wet (UCT), P.M. Vreeswijk (Radboud) and P.J. Groot (Radboud/UCT/SAAO) report on behalf of the MeerLICHT consortium:\n\nThe 0.6 m wide-field MeerLICHT optical telescope located in Sutherland, South Africa, obtained a repeated series of 60 s exposures in the q,u,g,r,i,z bands of GRB 231210B following the Swift detection (Page et al., GCN 35314). Observations started at 21:32:26 UT on 2023 November 18 (202 seconds post-trigger) and continued for a further 1.79 hours, following the filter sequence quqgqrqiqz. \n\nWe detect the optical afterglow also detected by MASTER, UVOT, LCOGT, and the VLT (Buckley et al., GCN 35313; Page et al., GCN 35314; Pérez-Fournon et al., GCN 35316; Saccardi et al., GCN 35317) with the following AB magnitudes:\n\nq = 17.15 +/- 0.02 at 21:32:57 UT\nu = 19.67 +/- 0.19 at 21:34:20 UT\ng = 18.69 +/- 0.04 at 21:37:17 UT\nr = 18.11 +/- 0.03 at 21:40:11 UT\ni = 18.15 +/- 0.05 at 21:43:08 UT\nz = 18.30 +/- 0.11 at 21:46:05 UT\n\nAs a precaution, we note that the absolute photometric calibration may have been adversely affected by condensation in the cryostat window due to high humidity. Our high cadence q-band observations show a power-law decline with a temporal index of -1.2 throughout the observations. \n\nMeerLICHT is built and run by a consortium consisting of Radboud University, University of Cape Town, the South African Astronomical Observatory, the University of Oxford, the University of Manchester and the University of Amsterdam. ",
  "createdOn": 1702329097508,
  "subject": "GRB 231210B: MeerLICHT afterglow observations",
  "bibcode": "2023GCN.35323....1D",
  "submittedHow": "web",
  "eventId": "GRB 231210B",
  "circularId": 35323
}