{
  "bibcode": "2008GCN..8359....1S",
  "body": "P. Schady (MSSL-UCL) and D.Grupe (PSU) report on behalf of the Swift/UVOT \nteam:\n\nThe Swift/UVOT observed the field of GRB 081011 (Grupe et al., GCN Circ. \n8355) with settled exposures starting 99s after the trigger. A new fading \nsource is detected in the white and u-band finding chart (fc) exposures \nand marginally in a co-added b-band exposure at\nRA(J2000) = 14:41:22.627 (220.34428)\nDec(J2000) = +33:32:37.12 (+33.54364)\nconsistent with the XRT position (Kennea et al., GCN Circ. 8358). These \ndetections imply an upper limit on the redshift of z < ~3.8. The source is \ndecaying with an approximate optical decay rate of alpha~1.1 (where the \nafterglow flux is proportional to t^-alpha).\n\nThe detections and 3 sigma upper limits in the UVOT photometric system \n(Poole et al. 2008, MNRAS, 383, 627) are:\n\nFilter������������T_start T_stop�� Exp��    Mag or 3-sigma UL\n������������������������(s)�� �� ��(s)���� �� (s)\n========================================================\nwhite (FC)����99�� �� ����249����������145.8��  19.25 +/- 0.08\nwhite��������������537���� �� 1878��������283.5�� ��20.33 +/- 0.13\nu (FC)������������257���� �� 507�������� 245.8���� 18.62 +/- 0.10\nu����������������������660���� �� 2003������ 155.6���� 19.91 +/- 0.30\nv�������������������� 586���� �� 7371������ 548.8�� ��> 20.29\nb����������������������512���� �� 6756����  351.4������21.13 +/- 0.39\nuvw1����������������636�������� 7781����  548.8���� > 20.96\nuvm2������������ ��611���� �� 7576�� �� 548.9��  > 20.74\nuvw2���������� �� 562�������� 7167����  548.8������> 21.06\n\nThe values quoted above are not corrected for the expected Galactic \nextinction corresponding to a reddening of E(B-V) = 0.01 mag in the \ndirection of the burst (Schlegel et al. 1998).",
  "circularId": 8359,
  "createdOn": 1223747822000,
  "email": "ps@mssl.ucl.ac.uk",
  "subject": "GRB081011: UVOT detection of an optical afterglow",
  "submitter": "Patricia Schady at MSSL/Swift  <ps@mssl.ucl.ac.uk>",
  "eventId": "GRB 081011"
}