{
  "body": "J.P. Osborne (U. Leicester), K.L. Page (U. Leicester), A.P. Beardmore\n(U. Leicester), M. Capalbi (INAF-IASFPA), M. Perri (SSDC & INAF-OAR),\nV. D'Elia (SSDC & INAF-OAR), M. A. Williams (PSU), S. Dichiara (PSU),\nJ.A. Kennea (PSU) and P.A. Evans (U. Leicester) reports on behalf of\nthe Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the\nSVOM/ECLAIRs-detected burst GRB 250213A, collecting  3.3 ks of Photon\nCounting (PC) mode data between T0+26.1 ks and T0+50.5 ks. \n\nThree uncatalogued X-ray sources have been detected, however none of\nthem is above the RASS limit or shows definitive signs of fading.\nTherefore, at the present time we cannot identify which, if any, is the\nafterglow. Details of these sources are given below:\n\nSource 2:\n  RA (J2000.0):  112.5572  =  07:30:13.74\n  Dec (J2000.0): -19.9494  =  -19:56:57.9\n  Error: 9.1 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: (5.8 [+2.0, -1.6])e-3 ct s^-1   \n  Distance: 578 arcsec from SVOM/ECLAIRs position.\n  Flux: (4.2 [+1.4, -1.2])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 3:\n  RA (J2000.0):  112.5390  =  07:30:9.37\n  Dec (J2000.0): -20.1093  =  -20:06:33.6\n  Error: 6.4 arcsec (radius, 90% conf.)\n  Count-rate: (3.4 [+1.4, -1.2])e-3 ct s^-1   \n  Distance: 175 arcsec from SVOM/ECLAIRs position.\n  Flux: (6.4 [+2.7, -2.2])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 4:\n  RA (J2000.0):  112.2781  =  07:29:6.75\n  Dec (J2000.0): -20.0889  =  -20:05:19.9\n  Error: 6.3 arcsec (radius, 90% conf.)\n  Count-rate: (3.0 [+1.6, -1.2])e-3 ct s^-1   \n  Distance: 712 arcsec from SVOM/ECLAIRs position.\n  Flux: (5.9 [+3.1, -2.3])e-14 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nA catalogued source was also detected.\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/00021777.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "bibcode": "2025GCN.39362....1O",
  "circularId": 39362,
  "submittedHow": "email",
  "eventId": "GRB 250213A",
  "createdOn": 1739892781800,
  "subject": "GRB 250213A: Swift-XRT observations"
}