{
  "bibcode": "2005GCN..3759....1B",
  "body": "GRB050803: Optical/UV Upper Limits from Swift-UVOT\n\nP. J. Brown (PSU), D.L. Band (GSFC-UMBC),\nP. Boyd (GSFC-UMBC), J. Norris (GSFC),\nK. Hurley (Berkeley), N. Gehrels (GSFC),\nreport on behalf of the Swift-UVOT Team:\n\nSwift detected and slewed immediately to the\nposition of GRB050803 (trigger=148833;\nBand et al. GCN 3748).  UVOT began settled\nobservations at 19:17:05.2 UT, 185 seconds\nafter the trigger.  No sources are detected\nwithin the revised XRT error circle\n(Racusin et al GCN 3752) in any of our images.\nThe following are 3 sigma upper limits at the\nindicated epochs.\n\nFilter  Tmid(sec)  Tmid(h)  Exp(sec)  UppLim(3-sigma)\nV       235.09     0.07     99.78     18.8\nV       365.14     0.1      9.76      17.5\nV       1357.88    0.38     99.72     18.5\nV       11900.74   3.31     899.76    20.0\n\nB       336.31     0.09     9.77      18.5\nB       1148.34    0.32     99.77     19.7\nB       6919.71    1.92     693.82    20.7\nB       18490.49   5.14     695.69    20.7\n\nU       322.1      0.09     9.76      18.3\nU       1043.66    0.29     99.77     19.5\nU       6115.3     1.7      899.77    20.7\nU       17685.21   4.91     899.77    20.7\n\nUVW1    308.4      0.09     9.79      18.7\nUVW1    5208.39    1.45     899.77    21.1\nUVW1    16778.3    4.66     899.76    21.1\n\nUVM2    294.29     0.08     9.79      18.5\nUVM2    1446.35    0.4      68.22     19.5\nUVM2    12705.06   3.53     694.85    20.9\n\nUVW2    351.49     0.1      9.78      19.4\nUVW2    1253.64    0.35     99.77     20.2\nUVW2    10993.89   3.05     899.78    21.5\n\nIn addition, no sources are detected within the\nXRT error circle when the above images are summed\ntogether, including those reported by Bloom et al\n(GCN 3758) and Berger et al (GCN 3753).\n\nThese magnitudes are based on preliminary zero-points,\nmeasured in orbit, and will require refinement with\nfurther calibration.",
  "circularId": 3759,
  "createdOn": 1123175217000,
  "email": "pbrown@astro.psu.edu",
  "subject": "GRB050803: Optical/UV Upper Limits from Swift-UVOT",
  "submitter": "Peter Brown at PSU  <pbrown@astro.psu.edu>",
  "eventId": "GRB 050803"
}