{
  "circularId": 43652,
  "bibcode": "2026GCN.43652....1D",
  "eventId": "GRB 260208A",
  "body": "S. Dichiara (PSU), K.L. Page (U. Leicester), A.P. Beardmore (U.\nLeicester), T. Sbarrato (INAF-OAB), P. D'Avanzo (INAF-OAB), M.G.\nBernardini (INAF-OAB), J.A. Kennea (PSU), D.N. Burrows (PSU) and P.A.\nEvans (U. Leicester) reports on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nFermi/LAT-detected burst GRB 260208A, collecting  3.4 ks of Photon\nCounting (PC) mode data between T0+35.1 ks and T0+42.2 ks. \n\nSix uncatalogued X-ray sources have been detected, with Source 1\nlocated 2.2 arcsec from the new optical source seen by MASTER and GOTO\n(GCN Circ. 43640 and 43641) and, therefore, consistent with that\nsource. The details of this new X-ray source are:\n\n  RA (J2000.0):  204.73150  =  13h 38m 55.56s\n  Dec (J2000.0): +33.80112  =  +33d 48' 04.0\"\n  Error: 2.5 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: 0.0488 +/- 0.0045 ct s^-1   \n  Flux: (1.55 +/- 0.14)e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nHowever, we cannot presently determine if the source is fading.\n\nThe results of the XRT-team automatic analysis of the XRT observations,\nincluding a position-specific upper limit calculator, are available at\nhttps://www.swift.ac.uk/ToO_GRBs/00021908.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "subject": "GRB 260208A: Swift-XRT observations",
  "createdOn": 1770587493855,
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "submittedHow": "email"
}