{
  "bibcode": "2015GCN.17428....1S",
  "body": "B. Sbarufatti (INAF-OAB/PSU) and D. Malesani (DARK/NBI) report on behalf of the Swift team\n\nA second epoch of observations on the ground discovered GRB 150204A (Cummings, GCN 17404) was performed by Swift from T+378.9 ks to T+391.6 ks, with a 3.9 ks exposure.\n\nThe source reported by Melandri et al. (GCN 17409) has faded below detection, with a 3-sigma upper limit of 1.5E-3 counts/s (6.2e-14 erg cm^-2 s^-1).  We therefore confirm that this is the X-ray afterglow of GRB 150204A.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 17428,
  "createdOn": 1423502803000,
  "email": "boris.sbarufatti@brera.inaf.it",
  "subject": "GRB 150204A: Swift/XRT afterglow confirmation",
  "submitter": "Boris Sbarufatti at INAF-OAB/IASFPA  <boris.sbarufatti@brera.inaf.it>",
  "eventId": "GRB 150204A"
}