{
  "bibcode": "2008GCN..7696....1K",
  "body": "D. A. Kann, C. Hoegner, and S. Ertel (TLS Tautenburg) report: \n\nWe observed the afterglow of Swift GRB 080506 (Baumgartner et al., GCN \n7685) with the Tautenburg 1.34m Schmidt telescope 1.33 days after the GRB, \nagain in good conditions. We obtained a four 300 sec exposures in the Rc \nband before twilight shut us down. The afterglow is faintly detected in \nthe stacked image.\n\nUsing the same comparison star as Kann et al. (GCN 7688), we find:\n\ntime (days)\tRc\tdRc\n\n1.3346\t\t22.23\t0.33\n\nAn extrapolation of the decay in the first 0.4 days (~0.63, Kann et al., \nGCN 7688, de Ugarte Postigo et al., GCN 7690) yields an expected magnitude \nof Rc ~ 21.8 at 1.33 days after the GRB. Our measured value lies below the \nextrapolation, indicating a break (possibly a jet break) may have occured. \nWe caution that the detection is rather marginal and the high sky \nbackground may falsify the measurement.\n\nThis message may be cited.",
  "circularId": 7696,
  "createdOn": 1210216682000,
  "email": "kann@tls-tautenburg.de",
  "subject": "GRB 080506: TLS 2nd Epoch - possible light curve break",
  "submitter": "Alexander Kann at TLS Tautenburg  <kann@tls-tautenburg.de>",
  "eventId": "GRB 080506"
}