{
  "bibcode": "2007GCN..6119....1S",
  "body": "G. Stratta, M. Perri, M. L. Conciatore (ASDC), D. N. Burrows (PSU) and\nG. Sato (GSFC/ISAS) report on behalf of the Swift/XRT team:\n\nThe field of the short hard BAT GRB 070209 (Sato et al., GCN Circ. 6086)\nhas been re-observed by Swift in two epochs at about T+5 days and T+9\ndays after the BAT trigger. The XRT exposures in Photon Counting mode\nwere 19.4 ks and 22.8 ks, respectively. We found no X-ray sources within\nthe BAT refined error circle (Sakamoto et al., GCN Circ. 6087). The three\nX-ray sources reported by Stratta et al. (GCN Circ. 6095) close to the\nBAT error circle are still detected at the same count rate level of the\nfirst follow-up observation. We conclude that none of these sources is\nthe afterglow of the burst.\n\nThe three sigma upper limit on the 0.7-10 keV count rate during the first\nobservation within the BAT error circle was about 7e-4 cts/s. Assuming an\nabsorbed power-law spectral model with Galactic NH (2.3e20 cm-2) and a\nphoton index of 2 this corresponds to an observed 0.7-10 keV flux of\nabout 3e-14 erg cm-2 s-1.\n\nThis circular is an official product of the Swift XRT Team.",
  "circularId": 6119,
  "createdOn": 1171985737000,
  "email": "perri@asdc.asi.it",
  "subject": "GRB 070209: Swift XRT refined analysis",
  "submitter": "Matteo Perri at ISAC/ASDC  <perri@asdc.asi.it>",
  "eventId": "GRB 070209"
}