{
  "submitter": "luca.izzo@inaf.it",
  "submittedHow": "web",
  "bibcode": "2025GCN.38930....1M",
  "body": "D. B. Malesani (DAWN/NBI and Radboud Univ.), and L. Izzo (INAF-OACn and DARK/NBI) report:\n\nWe observed the field of GRB 250114A (Klingler et al., GCN #38927) with the Sinistro instrument mounted on the 1-m telescope of the LCO network, located at the Cerro Tololo, Chile. Observations started on 2025 January 14 at 07:48:10 UT (14.85 minutes after the GRB trigger). We obtained a series of 3x180 s images in the SDSS-r filter.\n\nAt the location of the Swift-UVOT afterglow, we detect a faint source. We measure a preliminary magnitude of r = 20.18 +/- 0.15 mag (AB), calibrated against nearby stars from the Pan-STARRS catalog. This value is consistent with TRT observations obtained at a similar epoch (An et al., GCN #38929).\n\nThis project has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 101004719.",
  "createdOn": 1736844089172,
  "circularId": 38930,
  "eventId": "GRB 250114A",
  "format": "text/plain",
  "subject": "GRB 250114A: LCO optical observations"
}