{
  "bibcode": "2008GCN..8074....1K",
  "body": "T. Kruehler, J. Greiner (MPE Garching) and S. Klose (Tautenburg) report:\n\nWe triggered VLT/FORS imaging of the field of the Swift GRB 080727B\n(Immler et al. 2008, GCN #8022). A series of exposures were obtained in\nRc (6*120s), Bessel I (5*120s) and Gunn z (4*120s) starting from 06:19 UT\non 2008-07-29, roughly 46 hours after the burst. We marginally detect the\noptical afterglow (Li et al, 2008, GCN #8024) in the stacked I and z\nframes at 24.7 +- 0.3 mag (I) and 23.9 +- 0.5 mag (z), calibrated\nagainst USNO-B1 stars.\n\nGiven the large errors and the uncertain and high foreground extinction,\nthis is consistent with the power law reported in Kruehler et al (2008,\nGCN #8045) and puts the upper redshift limit to ~5. The 3 sigma upper\nlimit in Rc (>25.5 mag) is above that power law and does not constrain\nthe shape of the spectral energy distribution or the redshift.\n\nWe thank the ESO/VLT staff for the perfect support.",
  "circularId": 8074,
  "createdOn": 1218001095000,
  "email": "kruehler@mpe.mpg.de",
  "subject": "GRB 080727B: Late VLT imaging",
  "submitter": "Thomas Kruehler at MPE/MPI  <kruehler@mpe.mpg.de>",
  "eventId": "GRB 080727B"
}