{
  "bibcode": "2009GCN..9902....1G",
  "body": "D. Grupe (PSU)  reports on behalf  of the Swift XRT team:\n\nSwift has observed the field of IPN burst GRB090823 (Cummings et\nal. GCN Circ. 9835) twice after the initial 4.7 ks observation\non 2009-08-24 (Grupe et al., GCN Circ. 9840) for 9.5 ks on\n2009-08-27 and 7.5 ks on 2009-09-05. During the 2009-08-27\nobservation the X-ray source was clearly detected again at a level\nof (2.3+/-0.6)e-3 counts s-1 (about 1.1e-13 ergs s-1 cm-2), roughly\nhalf of the flux during the first observation. During the\n2009-09-05 observation however, the X-ray source is definitely\ngone and we can only derive a 3-sigma upper limit at a level of\n1.9e-3 counts s-1 (9.4e-14 ergs s-1 cm-2). We can confirm that the\nsource listed in GCN circ. 9840 is the X-ray afterglow of\nGRB 090823.",
  "circularId": 9902,
  "createdOn": 1252431233000,
  "email": "grupe@astro.psu.edu",
  "subject": "GRB 090823: Swift XRT confirmation of the X-ray afterglow",
  "submitter": "Dirk Grupe at PSU/Swift-XRT  <grupe@astro.psu.edu>",
  "eventId": "GRB 090823"
}