{
  "bibcode": "2018GCN.22712....1I",
  "body": "L. Izzo (HETH/IAA-CSIC) reports:\n\nWe observed the field of GRB 180512A (Deich et al., GCN Circ. 22710) with the 0.5m telescope of the Osservatorio Astronomico S. Di Giacomo located in Agerola, Italy ( http://acgo.it/oa )\n\nWe began observing at 22:31:54 UT (~30 min after the GRB trigger), and obtained 7x180s images in the Rc band. In our stacked image, we find no source inside the Swift-XRT error box down to a 3-sigma limit of Rc (Vega) > 20.2. The calibration was performed using nearby stars in the USNO B1 catalog.",
  "circularId": 22712,
  "createdOn": 1526168362000,
  "email": "Luca.Izzo@ICRA.it",
  "subject": "GRB 180512A: OASDG optical observations",
  "submitter": "Luca Izzo at IAA-CSIC  <Luca.Izzo@ICRA.it>",
  "eventId": "GRB 180512A"
}