{
  "bibcode": "2018GCN.22881....1L",
  "body": "GRB 180630A: Swift/UVOT Detection\n\nS. J. LaPorte (PSU) and P. D'Avanzo (INAF-OAB)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 180630A\n88 s after the BAT trigger (D'Avanzo et al., GCN Circ. 22872).\nA fading source consistent with the XRT position\n(Beardmore et al. GCN Circ. 22873)\nis detected in the initial UVOT exposures.\n\nThe preliminary UVOT position is:\n    RA  (J2000) =  03:15:55.74 =  48.98224 (deg.)\n    Dec (J2000) = -87:28:42.3  = -87.47842 (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\nsystem\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               88          237          148         17.49 +/- 0.04\nwhite             6384         6584          196         19.50 +/- 0.11\nv                  629         1597          117         18.56 +/- 0.20\nb                  555          748           39         18.76 +/- 0.19\nu                  300          549          246         17.76 +/- 0.06\nw1                 678         7392          510         19.42 +/- 0.17\nm2                 654         7187          452         20.16 +/- 0.33\nw2                 605         6777          255        >19.9\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.13 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 22881,
  "createdOn": 1530496006000,
  "email": "sjl5346@psu.edu",
  "subject": "GRB 180630A: Swift/UVOT Detection",
  "submitter": "Sam LaPorte at PSU  <sjl5346@psu.edu>",
  "eventId": "GRB 180630A"
}