{
  "bibcode": "2007GCN..6441....1H",
  "body": "T. Hattori, K. Aoki  (Subaru Telescope, NAOJ), and N. Kawai\n(Tokyo Tech) report on behalf of the Subaru GRB team:\n\n\"We observed the field of GRB 070520A (Romano et al., GCN 6423) with\nFOCAS on the Subaru Telescope in the z'-band from 06:32(UT) to\n07:27(UT) May 21 with a total exposure of 1920 sec (120s*16) under a\nnon-photometric condition with occasional clouds.\n\nIn the XRT error circle (Romano et al., GCN 6427), we find a possible\nafterglow candidate as a low-significance source (1.5 sigma) at \n\n  RA=12:53:26.52, Dec=74:59:26.6\n\nwith a positional uncertainty of 0.4\", and a rough estimation of the\nmagnitude z' ~ 24.\n\nThe image may be viewed at\nhttp://www.hp.phys.titech.ac.jp/nkawai/grb/070520A/ \"",
  "circularId": 6441,
  "createdOn": 1179764081000,
  "email": "nkawai@hp.phys.titech.ac.jp",
  "subject": "GRB 070520A: Subaru Observations",
  "submitter": "Nobuyuki Kawai at Tokyo Tech  <nkawai@hp.phys.titech.ac.jp>",
  "eventId": "GRB 070520A"
}