{
  "bibcode": "2006GCN..5580....1B",
  "body": "A. Breeveld (MSSL/UCL) and C. Guidorzi (Univ Bicoca&INAF-OAB) report on \nbehalf of the Swift/UVOT team:\n\nThe Swift/UVOT began taking data on 2006-09-19 73s after the burst \n(Guidorzi et al. GCN 5575). At the position of the XRT error circle \n(Guidorzi et al. GCN 5577) there are no new sources. In the summed UVOT \nimages we obtain the following 3 sigma upper limits:\n\nFilter          T_range(s)      Exp(s)          3sig_UL(mag)\nV               73-11544        2310            20.24\nB               674-24585       1330            21.02\nU               650-24547       2202            20.88\nUVW1    626-23633       1869            20.99\nUVM2    602-12448       1134            21.10\nUVW2    703-7232        424             20.65\nWhite   91-18800        982.1           21.00\n(160-650 nm)\nThese magnitudes are not corrected for the expected extinction of E(B-V)=0.072",
  "circularId": 5580,
  "createdOn": 1158749919000,
  "email": "roming@astro.psu.edu",
  "subject": "GRB060919:  Swift/UVOT optical observations",
  "submitter": "Pete Roming at PSU  <roming@astro.psu.edu>",
  "eventId": "GRB 060919"
}