{
  "bibcode": "2013GCN.14641....1M",
  "body": "F. E. Marshall (NASA/GSFC) reports on behalf of the Swift team:\n\nThe Swift/UVOT began settled observations of the field of GRB 130513A\n25261 s after the INTEGRAL trigger (Mereghetti et al., GCN Circ. 14630).\nNo optical afterglow consistent with the XRT position\n(Evans and Marshall GCN Circ. 14635) \nis detected in the initial UVOT exposures.\nPreliminary 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) \nfor the initial exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite            25885        32269         1218         >21.9\nv                26510        32924         1267         >20.6\nu                25261        37138         1399         >21.6\n\nThe magnitudes in the table are not corrected for the Galactic\nextinction\ndue to the reddening of E(B-V) = 0.03 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 14641,
  "createdOn": 1368552692000,
  "email": "femarsha@khamseen.gsfc.nasa.gov",
  "subject": "GRB 130513A: Swift/UVOT Upper Limits",
  "submitter": "Frank Marshall at GSFC  <femarsha@khamseen.gsfc.nasa.gov>",
  "eventId": "GRB 130513A"
}