{
  "bibcode": "2007GCN..6951....1Y",
  "body": "F. Yuan (U Mich), E.S. Rykoff (UCSB), T.A. McKay (U Mich), B. E. \nSchaefer (Louisiana State), R. Quimby (Caltech), H. Swan (U Mich), \nreport on behalf of the ROTSE collaboration:\n\nROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB \n071020 (Swift trigger 294835; Holland, et al., GCN6949) and detected the \noptical counterpart (Schaefer, et al., GCN 6948). During our first 80 \nseconds observation (starting 25.6 sec after the burst), the OT faded \nwith a decay index of 1.52 +/- 0.03.\n\nWe notice that the burst location is 9.7h^-1 kpc from the central bulge \nof SDSS J075843.38+325141.7, a galaxy with an old stellar population \nlocated at z=0.0166. DR6 SDSS data suggest this galaxy as M_r ~ -19.4, \nand a central velocity dispersion of 135 km/s.",
  "circularId": 6951,
  "createdOn": 1192867640000,
  "email": "yuanfang@umich.edu",
  "subject": "GRB 071020: ROTSE-III Analysis of Optical Counterpart",
  "submitter": "Fang Yuan at ROTSE  <yuanfang@umich.edu>",
  "eventId": "GRB 071020"
}