{
  "bibcode": "2015GCN.18237....1M",
  "body": "L.M. McCauley (PSU), J.A. Kennea (PSU), B. Sbarufatti (INAF-OAB/PSU),\nA.P. Beardmore (U. Leicester), J.P. Osborne (U. Leicester), V. D'Elia\n(ASDC), A. D'ai (INAF-IASFPA), A. Maselli  (INAF-IASFPA) and P.A. Evans\n(U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nFermi/LAT-detected burst GRB 150902A (Arimoto et al. GCN Circ. 18228),\ncollecting 4.9 ks of Photon Counting (PC) mode data between T0+59.6 ks\nand T0+78.6 ks. \n\nTwo uncatalogued X-ray sources have been detected inside or close to\nthe Fermi/LAT error region, however none of them is above the RASS\nlimit or shows definitive signs of fading. Therefore, at the present\ntime we cannot identify which, if any, is the afterglow. Details of\nthese sources are given below:\n\nSource 1:\n  RA (J2000.0):  214.9797  =  14:19:55.13\n  Dec (J2000.0): -69.3535  =  -69:21:12.6\n  Error: 4.4 arcsec (radius, 90% conf.)\n  Count-rate: 0.0116 +/- 0.0022 ct s^-1\n  Flux: (5.16 +/- 0.98)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 2:\n  RA (J2000.0):  215.2707  =  14:21:4.97\n  Dec (J2000.0): -69.4918  =  -69:29:30.3\n  Error: 8.2 arcsec (radius, 90% conf.)\n  Count-rate: (5.1 +/- 1.5)e-3 ct s^-1\n  Flux: (2.07 +/- 0.62)e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttp://www.swift.ac.uk/ToO_GRBs/00020549.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 18237,
  "createdOn": 1441378537000,
  "email": "boris.sbarufatti@brera.inaf.it",
  "subject": "GRB 150902A: Swift-XRT observations",
  "submitter": "Boris Sbarufatti at INAF-OAB/IASFPA  <boris.sbarufatti@brera.inaf.it>",
  "eventId": "GRB 150902A"
}