{
  "bibcode": "2025GCN.42288....1B",
  "body": "A.A. Breeveld (UCL-MSSL) and N. J. Klingler (GSFC/UMBC/CRESSTII) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 251014B\n49976 s after the Swift-BAT/GUANO trigger (Ronchini  et al., GCN 42263).\nNo new optical afterglow is detected in the initial UVOT exposures. Preliminary 3-sigma upper limits using the UVOT photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures binned is:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite           49976       73120         7974         >23.0\n\nThe magnitudes in the table are not corrected for the Galactic extinction due to the reddening of E(B-V) = 0.014 in the direction of the burst (Schlegel et al. 1998).\n",
  "subject": "GRB 251014B: Swift/UVOT Upper Limits",
  "submittedHow": "email",
  "circularId": 42288,
  "createdOn": 1760538724069,
  "eventId": "GRB 251014B",
  "submitter": "Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>"
}