{
  "bibcode": "2023GCN.35134....1K",
  "submittedHow": "email-legacy",
  "body": "N.P.M. Kuin (MSSL/UCL) and S. L. Laha (GSFC/UMBC) report\n\non behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 231117A\n106 s after the BAT trigger (Laha et al., GCN Circ. 35071).\nA source consistent with the XRT position (Beardmore et al.,\nGCN Circ. 35074  is detected in the initial UVOT exposures.\n\nPreliminary detections and 3-sigma upper limits using the UVOT\nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358,\n\n373) for the early exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              106         1713          392         21.21 +/- 0.27\nv                  648         1418           78        >18.8\nb                  574         1688           78        >19.3\nu                  318          741          265        >19.9\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.071 in the direction of the burst\n(Schlegel et al. 1998).\n",
  "submitter": "Paul Kuin at MSSL <npkuin@gmail.com>",
  "subject": "GRB231117A: Swift-UVOT detection",
  "circularId": 35134,
  "createdOn": 1700483375284,
  "eventId": "GRB 231117A"
}