{
  "bibcode": "2016GCN.20016....1H",
  "body": "L. M. Z. Hagen (PSU) and V. D'Elia (ASDC)\nreport on behalf of the Swift/UVOT team:\n\nThe Swift/UVOT began settled observations of the field of GRB 161007A\n133 s after the BAT trigger (D'Elia et al., GCN Circ. 20008). No\noptical afterglow consistent with the XRT position (Goad et al., GCN\nCirc. 20013) or the possible GTC optical counterpart (de Ugarte\nPostigo et al., GCN Circ. 20014) is detected in the initial UVOT\nexposures. Preliminary 3-sigma upper limits using the UVOT photometric\nsystem (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early\nexposures are:\n\nFilter         T_start(s)   T_stop(s)      Exp(s)         Mag\n\nwhite              133         1716          411         >20.79\nv                  621         1593          116         >18.39\nb                  547         1691          116         >19.26\nu                  291         1666          343         >19.73\nuvw1               671         1642          116         >18.69\nuvm2               646         1617          116         >18.81\nuvw2               596         1735          129         >19.04\n\n\nThe magnitudes in the table are not corrected for the Galactic extinction\ndue to the reddening of E(B-V) = 0.12 in the direction of the burst\n(Schlegel et al. 1998).",
  "circularId": 20016,
  "createdOn": 1475947768000,
  "email": "lea.zernow.hagen@gmail.com",
  "subject": "GRB 161007A: Swift/UVOT Upper Limits",
  "submitter": "Lea Hagen at PSU  <lea.zernow.hagen@gmail.com>",
  "eventId": "GRB 161007A"
}