{
  "bibcode": "2016GCN.18984....1B",
  "body": "A. A. Breeveld (UCL-MSSL) and P. D'Avanzo (INAF-OAB) report on behalf of \nthe Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 160203A \n151 s after the BAT trigger (D'Avanzo et al., GCN Circ. 18979).\nA fading source consistent with the optical position (Kruehler et al. \nGCN Circ. 18980) is detected in the initial UVOT exposures in the white \nfilter.\n\nPreliminary detections and 3-sigma upper limits using the UVOT \nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for \nthe early exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite_FC           151          301          147         20.56 �� 0.3\nwhite            10022        10928          885         21.9 �� 0.3\nb                 4946         5146          197        >20.7\nu                  309          472          160        >19.5\nv                 5562         5762          197        >19.7\nuvw1              5972         6171          197        >19.7\nuvm2              5766         5966          197        >19.6\nuvw2              5357         5557          197        >19.9\n\nThe magnitudes in the table are not corrected for the Galactic \nextinction due to the reddening of E(B-V) = 0.07 in the direction of the \nburst (Schlegel et al. 1998).",
  "circularId": 18984,
  "createdOn": 1454503843000,
  "email": "a.breeveld@ucl.ac.uk",
  "subject": "GRB 160203A: Swift/UVOT Detection",
  "submitter": "Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>",
  "eventId": "GRB 160203A"
}