{
  "bibcode": "2011GCN.11996....1K",
  "body": "D. A. Kann, S. Schmidl, C. Hoegner, B. Stecklum, S. Schumann and M.\nHartmann (TLS Tautenburg) report:\n\nWe observed the afterglow of GRB 110503A (M. Stamatikos et al., GCN 11991,\nG. Leloudas et al., GCN 11994) at z=1.613 (A. de Ugarte Postigo et al.,\nGCN 11993) with the 2m/1.34m Schmidt telescope of the Thueringer\nLandessternwarte Tautenburg under excellent observing conditions (low\nairmass, good transparency and seeing) starting during dawn at 0.098715\ndays after the GRB.\n\nObservations consisted of 3 x 180 s each in Z, Ic, Rc, V, B, followed by 3\nx 300 s each in Z, Ic, Rc, V, B. The afterglow is detected on the single\nimages.\n\nAssuming the USNO-B1.0 1421-0227752 star at RA = 08:51:10.01 (132.791692)\nDec. = +52:11:04.75 (+52.184653) has R = 16.91 (mean of R1 and R2 mags,\n0.06 mags difference), we find for two Rc band observations:\n\nt (days after trigger) = 0.1187616, Rc = 19.07 +/- 0.03\nt (days after trigger) = 0.1750347, Rc = 19.51 +/- 0.04\n\nErrors are statistical only.\n\nObservations are continuing as weather permits with 600 s exposures in all\nfive colors.\n\nThis message may be cited.",
  "circularId": 11996,
  "createdOn": 1304464752000,
  "email": "kann@tls-tautenburg.de",
  "subject": "GRB 110503A - TLS Afterglow Observations",
  "submitter": "Alexander Kann at TLS Tautenburg  <kann@tls-tautenburg.de>",
  "eventId": "GRB 110503A"
}