{
  "bibcode": "2013GCN.14371....1P",
  "body": "C. Pagani (U. Leicester), K.L. Page (U. Leicester) and P.A. Evans (U. Leicester) report on behalf of the Swift XRT team:\n\nSwift performed 4 tiled observations of the MAXI detected GRB 130407A (Fukushima et al., GCN 14359) to cover the MAXI error circle. The data are all in Photon Counting (PC) mode. No bright X-ray afterglow is detected in the XRT observations.\n\nThe 3sigma upper limit is 1.1 x 10^-2  cts/s. This corresponds to an observed 0.3-10 keV flux of 3.7 x 10^-13  erg/cm2/s, assuming a typical GRB spectrum with photon spectral index of 2. If we consider the Galactic absorption in this direction (4.9 x 10^20  cm^-2; Kalberla et al. 2005) this corresponds to an unabsorbed flux of 4.3 x 10^-13  erg/cm2/s.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 14371,
  "createdOn": 1365513609000,
  "email": "cp232@star.le.ac.uk",
  "subject": "GRB 130407A: Swift-XRT observations",
  "submitter": "Claudio Pagani at U of Leicester  <cp232@star.le.ac.uk>",
  "eventId": "GRB 130407A"
}