{
  "bibcode": "2016GCN.19409....1I",
  "body": "L.Izzo (IAA-CSIC), A. de Ugarte Postigo (IAA-CSIC, DARK/NBI), C. Thoene\n(IAA-CSIC) report:\n\nWe observed the field of GRB 160509A (Longo et al., GCN 19403; Ono et al.,\nGCN 19404) with the iTelescope.Net <http://itelescope.net> (\nhttp://www.itelescope.net)\nT11 (Planewave CDK 0.51m) telescope located at the Mayhill observatory\n(NM).\nA single image of 300 s was obtained in the R filter, starting at 10:32:32\nUT, 1.56 hr\nafter the GRB trigger. We do not detect any optical afterglow candidate at\nthe refined Swift-XRT position (Kennea et al. GCN 19408). We estimate an\nupper limit magnitude of R = 19.5 mag (3-sigma), using the USNO-B1 catalog\nas reference. We note that our image covers also the complete error box of\nthe MAXI (Ono et al., GCN 19404). Data are available on request.\n\nAn image of the field of view can be seen at http://goo.gl/dKTki3\n\n[GCN OPS NOTE(09may16):  Per author's request, The affiiation and reply-to\nemail address of LI was changed.]",
  "circularId": 19409,
  "createdOn": 1462812746000,
  "email": "izzo@iaa.es",
  "subject": "GRB 160509A: optical observations",
  "submitter": "Luca Izzo at IAA-CSIC  <izzo@iaa.es>",
  "eventId": "GRB 160509A"
}