{
  "bibcode": "2019GCN.24815....1M",
  "body": "F. E. Marshall (NASA/GSFC) and E. Ambrosi (INAF-IASFPA)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 190613A\n145 s after the BAT trigger (Ambrosi et al., GCN Circ. 24798).\nA source consistent with the enhanced XRT position\n(Osborne et al. GCN Circ. 24809)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n    RA  (J2000) =  12:10:07.01 = 182.52920 (deg.)\n    Dec (J2000) = +67:14:07.0  =  67.23529 (deg.)\nwith an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT photometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are:\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              145          295          147         17.88 +/- 0.04\nv                  634         1061           58         18.63 +/- 0.29\nb                  560          753           39         18.93 +/- 0.21\nu                  303          553          246         18.88 +/- 0.11\nw1                 685        11118         1121        >20.1\nm2                5323         6859          296        >20.8\nw2                4913         6548          393        >21.5\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.02 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 24815,
  "createdOn": 1560447406000,
  "email": "marshall@milkyway.gsfc.nasa.gov",
  "subject": "GRB 190613A: Swift/UVOT Detection",
  "submitter": "Frank Marshall at Swift/UVOT  <marshall@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 190613A"
}