{
  "bibcode": "2013GCN.14254....1M",
  "body": "F. E. Marshall (NASA/GSFC) and A. Melandri (INAF-OAB)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began observations of the field of GRB 130216A\n3.67 days after the BAT trigger (Melandri et al., GCN Circ. 14223).\nThe observations were delayed because of an observing constraint\ndue to the Moon. No new source is seen inside the refined BAT\nerror circle (Barthelmy et al. GCN Circ. 14229).\n\nThe preliminary 3-sigma upper limit using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)        Mag\nw1              317224       346946         7959        >22.2\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.49 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 14254,
  "createdOn": 1362175334000,
  "email": "femarsha@khamseen.gsfc.nasa.gov",
  "subject": "GRB 130216A: Swift/UVOT Upper Limit",
  "submitter": "Frank Marshall at GSFC  <femarsha@khamseen.gsfc.nasa.gov>",
  "eventId": "GRB 130216A"
}