{
  "bibcode": "2014GCN.16494....1B",
  "body": "A. A. Breeveld (UCL-MSSL) and A. Y. Lien (GSFC/UMBC) report on behalf of \nthe Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140629A \n101 s after the BAT trigger (Lien et al., GCN Circ. 16477).\nA fading source consistent with the XRT position (Evans et al. GCN Circ. \n16479) is detected in the initial UVOT exposures. The fact that it is \nnot seen in uvm2 or uvw2 filters is consistent with the redshift given \nby Moskvitin et al., GCN Circ. 16489 and D�Avanzo et al., GCN Circ. 16493.\n\nThe preliminary UVOT position is:\n     RA  (J2000) =  16:35:54.42 = 248.97676 (deg.)\n     Dec (J2000) = +41:52:36.8  =  41.87690 (deg.)\nwith an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT \nphotometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for \nthe early exposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite              101          251          147         14.78 � 0.02\nv                  643          663           20         15.29 � 0.09\nb                  569          589           20         15.70 � 0.06\nu                  313          563          246         14.89 � 0.03\nw1                 692          712           19         17.5  � 0.3\nm2                 667          687           19        >17.5\nw2                 619          639           19        >18.0\n\nThe magnitudes in the table are not corrected for the Galactic \nextinction due to the reddening of E(B-V) = 0.01 in the direction of the \nburst (Schlegel et al. 1998).",
  "circularId": 16494,
  "createdOn": 1404127969000,
  "email": "a.breeveld@ucl.ac.uk",
  "subject": "GRB 140629A: Swift/UVOT Detection",
  "submitter": "Alice Breeveld at MSSL-UCL  <a.breeveld@ucl.ac.uk>",
  "eventId": "GRB 140629A"
}