{
  "bibcode": "2015GCN.18531....1O",
  "body": "S. R. Oates (IAA-CSIC/UCL-MSSL) and T. N. Ukwatta (LANL)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 151029A\n92 s after the BAT trigger (Ukwatta et al., GCN Circ. 18522).\nA source consistent with the XRT position (Beardmore et al., GCN Circ. 18526)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n  RA  (J2000) =  02:34:06.72 =  38.52799 (deg.)\n  Dec (J2000) = -35:23:08.6  = -35.38573 (deg.)\nwith an estimated uncertainty of 0.42 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: \n\nFilter         T_start(s)   T_stop(s)      Exp(s)           Mag\n\nwhite               92          242          147         16.98 +/- 0.03\nv                  634          653           19         17.66 +/- 0.32\nb                  560          752           39         19.24 +/- 0.33\nu                  304          554          246         17.35 +/- 0.06\nw1                 683          703           19        >17.98\nm2                 658          850           39        >18.17\nw2                 609          802           39        >18.64\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": 18531,
  "createdOn": 1446148316000,
  "email": "sro@mssl.ucl.ac.uk",
  "subject": "GRB 151029A: Swift/UVOT Detection",
  "submitter": "Samantha Oates at MSSL  <sro@mssl.ucl.ac.uk>",
  "eventId": "GRB 151029A"
}