{
  "bibcode": "2014GCN.15768....1S",
  "body": "C. A. Swenson (PSU) and A. Melandri (INAF-OAB)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 140129A\n117 s after the BAT trigger (Melandri et al., GCN Circ. 15760).\nA source consistent with the XRT position (Evans et al. GCN Circ. 15764)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n     RA  (J2000) =  02:31:33.78 =  37.89076 (deg.)\n     Dec (J2000) = -01:35:43.4  =  -1.59539 (deg.)\nwith an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).\n\nPreliminary detections and 3-sigma upper limits using the UVOT \nphotometric system\n(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early \nexposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s) Mag\n\nwhite              117          267          147 16.51 � 0.03\nv                  605         1250           78 18.69 � 0.24\nb                  531          551           20 17.76 � 0.14\nu                  275          525          246 16.98 � 0.04\nw1                 654        17641         1357 20.77 � 0.22\nm2                5292        13449         1054 >21.2\nw2                 753        11858         1102 >22.0\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.03 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 15768,
  "createdOn": 1391014365000,
  "email": "cswenson@astro.psu.edu",
  "subject": "GRB 140129A: Swift/UVOT Observations",
  "submitter": "Craig Swenson at PSU/Swift  <cswenson@astro.psu.edu>",
  "eventId": "GRB 140129A"
}