{
  "bibcode": "2008GCN..7593....1R",
  "body": "GRB 080413: ROTSE-III Detection of Optical Counterpart\n\nE.S. Rykoff (UCSB), 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 080413A (Swift trigger 309096). The first image was at\n02:54:39.7 UT, 20.4 s after the burst (6.7 s after the GCN notice time).\nThe unfiltered images are calibrated relative to USNO A2.0. We detect a\n12.8 magnitude, fading source with coordinates:\n\n19:09:11.8 -27:40:41.6 (J2000), with positional uncertainty of 1' or better\n\nstart UT mag mlim(of image)\n----------------------------------\n02:54:39.7 12.8 15.3\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/gsb309096_3c00_img.jpg Note that the object\nmarked 7 is the candidate in question.\n\nContinuing observations are in progress.",
  "circularId": 7593,
  "createdOn": 1208055783000,
  "email": "wiphu@as.arizona.edu",
  "subject": "GRB 080413: ROTSE-III Detection of Optical Counterpart",
  "submitter": "Wiphu Rujopakarn at U AZ/Steward  <wiphu@as.arizona.edu>",
  "eventId": "GRB 080413"
}