{
  "bibcode": "2005GCN..3992....1H",
  "body": "GRB 050915B: Swift/UVOT Upper Limits\n\nS. T. Holland (GSFC/USRA), A. Falcone (PSU), M. Carter (UCL/MSSL),\nP. Smith (UCL/MSSL), and N. Gehrels (GSFC) report on behalf of the\nSwift/UVOT team:\n\n      The Swift/UVOT began observing the field of GRB 050915B 121\nseconds after the BAT trigger (Falcone et al. GCN 3987). No new source\nis detected at the position of the XRT error circle (Falcone et\nal. GCN 3989) in the initial 100 second V-band image down to a 5-sigma\nupper limit of 17.5, or in summed exposures with any of the filters\ndown to the following 5-sigma magnitude upper limits:\n\nFilter  T_range (s)     Exp (s)  5sig UL\n\nV       133 - 25,406     1824     19.2\nB       279 - 35,461     2983     20.4\nU       265 - 31,288     2381     20.2\nUVW1    251 - 30,503     2972     21.0\nUVM2    237 - 29,595     3006     20.7\nUVW2    294 - 35,995     2609     20.8\n\nThe magnitudes are uncorrected for extinction.",
  "circularId": 3992,
  "createdOn": 1126901987000,
  "email": "sholland@milkyway.gsfc.nasa.gov",
  "subject": "GRB 050915B: Swift/UVOT Upper Limits",
  "submitter": "Stephen Holland at USRA/NASA/GSFC/SSC  <sholland@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050915B"
}