{
  "bibcode": "2005GCN..4390....1R",
  "body": "P. Roming (PSU), A. A. Breeveld (UCL-MSSL), F. Marshall, A. Parsons, R. \nFink (GSFC), & M. Ajello (MPE) on behalf of the Swift/UVOT team:\n\nWe have created a summed image from 2.78 ksec of exposure on GRB051221A \n(Parsons et al., GCN 4363) through the \"UVW1\" filter of the Swift UVOT. \n From the summed image we detect a source at 4.8-sigma confidence with a \nposition coincident with the one reported by Bloom (GCN 4367) and Berger \n(GCN 4369). The magnitude of the source is 20.2+/-0.2 as determined by the \nSwift analysis tool, uvotsource.\n\nExamination of individual frames suggests that the source is not \ndistinguishable above background in the individual short (50-s and 100-s) \nexposures and is only visible at the 3-sigma level in one of the early ~600 \nsecond exposures of the sequence.",
  "circularId": 4390,
  "createdOn": 1135364711000,
  "email": "roming@astro.psu.edu",
  "subject": "GRB 051221A: Detection at 251nm with Swift UVOT",
  "submitter": "Pete Roming at PSU  <roming@astro.psu.edu>",
  "eventId": "GRB 051221A"
}