{
  "bibcode": "2007GCN..6723....1S",
  "body": "A. Stefanescu (1), S. Duscha (1), G. Kanbach (1), F. Schrey (1), A.\nSlowikowska (2)(3), H. Steinle (1) ((1)=MPE Garching, (2)=FORTH,\nHeraklion (3)=NCAC, Torun) of the OPTIMA-Burst Team report the following:\n\nOPTIMA-Burst at the 1.3m Skinakas Observatory, of the University of\nCrete, Greece observed the location of the XRT error-circle of GRB\n070808 (GCN Circ 6718, J. R. Cummings et al.), starting at 2007-08-08\n21:45:35 UT (3.3h after the burst).\n\nWe did not detect any source inside the XRT error-circle in 3 co-added\n900s exposures in R-filter.\n\nOur limit is as follows:\n\nt-t_0 (mid-exp)       t_exp     R-limit\n13229s (i.e. 3.7h)    2700s     22.0",
  "circularId": 6723,
  "createdOn": 1186618631000,
  "email": "astefan@mpe.mpg.de",
  "subject": "GRB 070808: OPTIMA-Burst optical upper limit",
  "submitter": "Alexander Stefanescu at MPE  <astefan@mpe.mpg.de>",
  "eventId": "GRB 070808"
}