{
  "bibcode": "2016GCN.19412....1M",
  "body": "F. E. Marshall (NASA/GSFC) and T.G.R. Roegiers (PSU) report on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the Swift-XRT afterglow\n(Kennea et al., GCN Circ. 19408) 7259 s after the LAT trigger \n(Longo et al., GCN Circ. 19403). No UVOT source consistent with the position \nof Swift-XRT afterglow or the position of the optical afterglow\ncandidate (Levan et al., GCN Circ. 19410) is found in the initial exposure.\nThe preliminary upper limit using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) is:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nu                7259         7531          268          >20.5 \n\nThe magnitude in the table is not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.31 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 19412,
  "createdOn": 1462816485000,
  "email": "femarsha@khamseen.gsfc.nasa.gov",
  "subject": "GRB 160509A: Swift/UVOT Upper Limit",
  "submitter": "Frank Marshall at GSFC  <femarsha@khamseen.gsfc.nasa.gov>",
  "eventId": "GRB 160509A"
}