{
  "bibcode": "2011GCN.12355....1H",
  "body": "E. A. Hoversten (PSU) and S. T. Holland (CRESST/USRA/GSFC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 110915A  \n84 ks after the BAT trigger (Holland et al., GCN Circ. 12335).  No  \noptical afterglow consistent with the enhanced XRT position (Evans et  \nal., GCN Circ. 12340) is detected in the initial UVOT exposures.   \nUVOT magnitude 3-sigma upper limits are reported in the following table:\n\nFilter  T_start  T_stop  Exp(s)  Mag (3-sigma upper limit)\n-------------------------------------------------------------\nwhite      84     1884    429       > 21.46\nv         616     5316    203       > 19.35\nb         540     1858    136       > 20.10\nu         284     1834    362       > 20.36\nuvw1      665     1809    136       > 19.59\nuvm2      641     1784    136       > 19.46\nuvw2      592     1897    144       > 19.82\n\nThe quoted upper limits have not been corrected for the expected\nGalactic extinction along the line of sight of E_(B-V) = 0.06\n(Schlegel et al. 1998). All photometry is on the UVOT photometric  \nsystem described in Poole et al. (2008, MNRAS, 383, 627).",
  "circularId": 12355,
  "createdOn": 1316290686000,
  "email": "hoversten@astro.psu.edu",
  "subject": "GRB 110915A: Swift/UVOT Upper Limits",
  "submitter": "Erik Hoversten at Swift/Penn State  <hoversten@astro.psu.edu>",
  "eventId": "GRB 110915A"
}