{
  "bibcode": "2008GCN..8536....1Y",
  "body": "F. Yuan (U Mich), W. Rujopakarn (Steward) report on behalf of the ROTSE \ncollaboration:\n\nROTSE-IIIc, located at the H.E.S.S. site at Mt. Gamsberg, Namibia, \nresponded to GRB 081121 (Swift trigger 335105). The first image was at \n20:36:30.0 UT, 57.2 s after the burst (8.9 s after the GCN notice time). \nThe unfiltered images are calibrated relative to USNO A2.0. We detect a \n11.6 magnitude, fading source with coordinates:\n\n     05:57:06.1      -60:36:10.3    (J2000), with positional uncertainty \nof 1\" or better\n\nstart UT    \tmag     mlim(of image)\n----------------------------------\n20:36:29.9     11.6     15.7 \n\n\nThis source is not visible in DSS (second epoch), 2MASS or the MPChecker \ndatabase.\n\nA jpeg image is available at \nhttp://www.rotse.net/images/gsb335105_3c00_img.jpg Note that the object \nmarked 4 is the candidate in question.\n\nContinuing observations are in progress.",
  "circularId": 8536,
  "createdOn": 1227300083000,
  "email": "yuanfang@umich.edu",
  "subject": "GRB 081121: ROTSE-III Detection of Optical Counterpart",
  "submitter": "Fang Yuan at ROTSE  <yuanfang@umich.edu>",
  "eventId": "GRB 081121"
}