{
  "bibcode": "2006GCN..4558....1W",
  "body": "G. G. Williams, E. Olszewski, and P. A. Milne (Steward Observatory) \nreport:\n\nWe observed the HETE-SXC error region of the short/hard GRB 060121 \n(Arimoto et al., GCN 4550, Prigozhin et al., GCN 4551, Boer et al., GCN \n4552) with the 90prime imager on the Steward Observatory 90-inch Bok \ntelescope at Kitt Peak.  We obtained two sets of summed images in Rc, each \nwith a total exposure time of 1800 seconds, beginning at 04:02:45 UT (5.6 \nhours after the GRB) and at 05:40:29 UT.  Visual comparison of these \nimages reveals no significantly variable sources to approximately 1.0 \nmagnitudes deeper than the SDSS r' image (Cool et al., GCN 4554).\n\nThis message may be cited.",
  "circularId": 4558,
  "createdOn": 1137920617000,
  "email": "ggwilli@mmto.org",
  "subject": "GRB 060121: optical observations",
  "submitter": "Grant Williams at Steward Observatory  <ggwilli@mmto.org>",
  "eventId": "GRB 060121"
}