{
  "bibcode": "2009GCN.10292....1D",
  "body": "V. D'Elia, G. Stratta, M. Perri (ASDC), J. Cummings (GSFC/CRESST) report\non behalf of the Swift-XRT team:\n\nSwift-XRT has observed the field of GRB 091117 about one month after  \nthe burst\n(Cummings et al. GCN Circ. 10171).   The data set consists of two  \nfurther\nobservations, 9.7 ks and 9.2 ks, from 32.8 to 34.2 days after the  \ntrigger.\nThe data are entirely in Photon Counting (PC) mode.\n\nWe found that Source #1 (Berger, GCN Circ. 10173; D'Elia et al.,\nGCN Circ. 10177; Fox, GCN Circ. 10179, D'Elia et al., GCN Circ 10181)\nis still detected with a count rate of (2.95+/-0.70)e-3 cts/s (first\nobservation) and (3.42+/-0.75)e-3 cts/s (second observation),\nthus showing no evidence of fading with respect to the first Swift\nfollow-up observations.  Thus evidence of possible fading of Source #1,\nreported in Fox (GCN Circ. 10179), D'Elia et al. (GCN Circ.10181) and\nFox & Berger (GCN Circ. 10232), is not confirmed by these measurements.\n\nSource #2 (D'Elia et al., GCN Circ. 10177; Fox, GCN Circ. 10179,  \nD'Elia et al.,\nGCN Circ 10181) is also detected, and the derived count rate is\n(2.03+/-0.55)e-3 cts/s (first observation) and (1.85+/-0.54)e-3 cts/s\n(second observation).  No evidence of a fading behavior is found for  \nthis\nsource either.\n\nAll quoted errors are given at the 1-sigma level.\n\nIn view of these XRT observations, we can safely conclude that neither\nsource is the X-ray afterglow of GRB091117.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 10292,
  "createdOn": 1261585078000,
  "email": "delia@mporzio.astro.it",
  "subject": "GRB 091117: Swift-XRT late time observations",
  "submitter": "Valerio D'Elia at INAF-OAR  <delia@mporzio.astro.it>",
  "eventId": "GRB 091117"
}