{
  "bibcode": "2005GCN..3230....1B",
  "body": "P. Boyd (GSFC-UMBC), S. T. Holland, M. Still (GSFC-USRA), V. Mangano\n(INAF-IASF/Palermo), S. Hunsberger, (PSU), T. Poole (MSSL), N. Gehrels\n(GSFC), K. Mason (MSSL), J. Nousek (PSU), and A. Wells (Leicester) on\nbehalf of the Swift UVOT team report:\n\n     The Swift Ultraviolet/Optical Telescope (UVOT) observed the field\nof GRB 050410 (Fenimore et al., GCN 3219) starting at 12:46:04 UT on\n10 April 2005.  We find no evidence for a source in the 5 arcsecond\nradius XRT error circle (La Parola et al., GCN 3218) in the UVOT data.\nThe 3-sigma limiting magnitudes in a 3.5 arcsecond radius circular\naperture , and the coadded exposure times, are: V = 19.9 (392 s), B =\n21.2 (1199 s), U = 20.9 (1326 s), UVW1 = 20.8 (399 s), UVM2 = 21.1\n(399 s), and UVW2 = 21.7 (788 s).  The magnitudes reported in this\nCircular are based upon preliminary flight calibrations.",
  "circularId": 3230,
  "createdOn": 1113187836000,
  "email": "sholland@milkyway.gsfc.nasa.gov",
  "subject": "GRB 050410: Early Optical/Ultraviolet Observations with Swift/UVOT",
  "submitter": "Stephen Holland at USRA/NASA/GSFC/SSC  <sholland@milkyway.gsfc.nasa.gov>",
  "eventId": "GRB 050410"
}