{
  "bibcode": "2009GCN.10302....1S",
  "body": "M. H. Siegel (PSU) and H. A. Krimm (CRESST/GSFC/USRA)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB\n091230 32291 s after the Integral detection (Gotz et al., GCN\nCirc. 10298).  We do not detect the afterglow reported by GROND\n(Filgas et al., GCN Circ. 10299) and Swift-XRT (Beardmore et al.,\nGCN Cic. 10300).\n\nPreliminary 3-sigma upper limits are:\n\nFILTER     T_start(s)  T_stop    Exposure     Mag/3UL\n=============================================================\nwhite      32291        42824     3898        >22.2\n\nThe above magnitudes are not corrected for the Galactic extinction\ncorresponding to a reddening of E_{B-V} = 0.36 (Schlegel et al.,\n1998, ApJS, 500, 525). The photometry is on the UVOT photometric\nsystem described in Poole et al. (2008, MNRAS, 383, 627).",
  "circularId": 10302,
  "createdOn": 1262285434000,
  "email": "siegel@astro.psu.edu",
  "subject": "GRB 091230: Swift/UVOT Observations",
  "submitter": "Mike Siegel at PSU/Swift MOC  <siegel@astro.psu.edu>",
  "eventId": "GRB 091230"
}