{
  "submittedHow": "email",
  "eventId": "GRB 251115A",
  "submitter": "Phil Evans at U of Leicester <pae9@star.le.ac.uk>",
  "body": "S. Dichiara (PSU), J.A. Kennea (PSU), K.L. Page (U. Leicester), A.P.\nBeardmore (U. Leicester), T. Sbarrato (INAF-OAB), P. D'Avanzo\n(INAF-OAB), M.G. Bernardini (INAF-OAB), 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 251115A in a series of observations tiled\non the sky.  The total exposure time is  4.9 ks, distributed over 5\ntiles; the maximum exposure at a single sky location in the tiling was\n2.1 ks. The data were collected between T0+35.6 ks and T0+80.1 ks, and\nare entirely in Photon Counting (PC) mode. \n\nSix uncatalogued X-ray sources have been detected, however none of them\nis above the RASS limit or shows definitive signs of fading. Therefore,\nat the present time we cannot identify which, if any, is the afterglow.\nDetails of these sources are given below:\n\nSource 1:\n  RA (J2000.0):  330.1753  =  22h 00m 42.06s\n  Dec (J2000.0): -9.3644  =  -09d 21' 51.7\"\n  Error: 8.5 arcsec (radius, 90% conf.)\n  Count-rate: (3.7 [+2.2, -1.6])e-3 ct s^-1   \n  Distance: 660 arcsec from Fermi/LAT position.\n\nSource 2:\n  RA (J2000.0):  330.0683  =  22h 00m 16.38s\n  Dec (J2000.0): -9.4681  =  -09d 28' 05.0\"\n  Error: 8.6 arcsec (radius, 90% conf.)\n  Count-rate: (6.2 [+3.9, -2.8])e-3 ct s^-1   \n  Distance: 1100 arcsec from Fermi/LAT position.\n\nSource 3:\n  RA (J2000.0):  330.0530  =  22h 00m 12.72s\n  Dec (J2000.0): -9.1976  =  -09d 11' 51.3\"\n  Error: 5.8 arcsec (radius, 90% conf.)\n  Count-rate: (4.3 [+2.3, -1.7])e-3 ct s^-1   \n  Distance: 437 arcsec from Fermi/LAT position.\n  Flux: (2.26 [+1.23, -0.91])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 4:\n  RA (J2000.0):  330.2127  =  22h 00m 51.06s\n  Dec (J2000.0): -9.1608  =  -09d 09' 38.9\"\n  Error: 14.1 arcsec (radius, 90% conf.)\n  Count-rate: (9.6 [+4.4, -3.4])e-3 ct s^-1   \n  Distance: 152 arcsec from Fermi/LAT position.\n  Flux: (3.6 [+1.6, -1.2])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 6:\n  RA (J2000.0):  329.7737  =  21h 59m 05.69s\n  Dec (J2000.0): -8.8965  =  -08d 53' 47.2\"\n  Error: 5.6 arcsec (radius, 90% conf.)\n  Count-rate: 0.0113 [+0.0055, -0.0042] ct s^-1   \n  Distance: 1756 arcsec from Fermi/LAT position.\n  Flux: (4.5 [+2.2, -1.7])e-13 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 7:\n  RA (J2000.0):  329.8892  =  21h 59m 33.40s\n  Dec (J2000.0): -8.9944  =  -08d 59' 39.8\"\n  Error: 6.6 arcsec (radius, 90% conf.)\n  Count-rate: 0.0101 [+0.0049, -0.0038] ct s^-1   \n  Distance: 1218 arcsec from Fermi/LAT position.\n  Flux: (2.63 [+1.28, -0.99])e-13 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 tiled XRT\nobservations, including a position-specific upper limit calculator, are\navailable at https://www.swift.ac.uk/xrt_products/TILED_GRB00140.\n\nThis circular is an official product of the Swift-XRT team.\n\n",
  "bibcode": "2025GCN.42733....1D",
  "createdOn": 1763460575020,
  "circularId": 42733,
  "subject": "GRB 251115A: Swift-XRT observations"
}