{
  "bibcode": "2019GCN.23935....1D",
  "body": "A. D'Ai (INAF-IASFPA), A. Melandri (INAF-OAB), J.A. Kennea (PSU), B.\nSbarufatti (INAF-OAB/PSU), D.N. Burrows (PSU), A.P. Beardmore (U.\nLeicester), J.P. Osborne (U. Leicester), P. D'Avanzo (INAF-OAB) and\nP.A. Evans (U. Leicester) report on behalf of the Swift-XRT team:\n\nSwift-XRT has performed follow-up observations of the AGILE and MAXI\ndetected burst GRB 190305A (Ursi et al. GCN Circ. 23930, Nakahira et\nal. GCN Circ.23933) in a series of observations tiled on the sky. The\ntotal exposure time is 4.4 ks, distributed over 7 tiles; the maximum\nexposure at a single sky location was 1.4 ks. The data were collected\nbetween T0+31.9 ks and T0+43.5 ks, and are entirely in Photon Counting\n(PC) mode. \n\nSix uncatalogued X-ray sources have been detected.  Source 1 is\nsignificantly brighter than the other candidates and  it is marginally\nabove the RASS limit, although,  at the moment, we cannot assess if it\nis fading.\n\nDetails of these sources are given below:\n\nSource 1:\n  RA (J2000.0):  11.62657  =  00:46:30.38\n  Dec (J2000.0): -50.34865  =  -50:20:55.1\n  Error: 2.5 arcsec (radius, 90% conf. [Enhanced position])\n  Count-rate: 0.100 +/- 0.014 ct s^-1\t\n  Distance: 1069 arcsec from MAXI position.\n  Flux: (4.79 +/- 0.67)e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 2:\n  RA (J2000.0):  10.5180  =  00:42:4.32\n  Dec (J2000.0): -50.1058  =  -50:06:20.9\n  Error: 6.9 arcsec (radius, 90% conf.)\n  Count-rate: 0.0109 [+0.0066, -0.0047] ct s^-1   \n  Distance: 1875 arcsec from MAXI position.\n\nSource 3:\n  RA (J2000.0):  11.5149  =  00:46:3.57\n  Dec (J2000.0): -49.9843  =  -49:59:03.4\n  Error: 6.5 arcsec (radius, 90% conf.)\n  Count-rate: 0.0172 [+0.0055, -0.0045] ct s^-1   \n  Distance: 649 arcsec from MAXI position.\n  Flux: (1.07 [+0.34, -0.28])e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\n\nSource 4:\n  RA (J2000.0):  10.8580  =  00:43:25.92\n  Dec (J2000.0): -50.1848  =  -50:11:05.2\n  Error: 7.7 arcsec (radius, 90% conf.)\n  Count-rate: 0.0208 [+0.0085, -0.0067] ct s^-1   \n  Distance: 1113 arcsec from MAXI position.\n  Flux: (7.6 [+3.1, -2.5])e-12 erg cm^-2 s^-1 (observed, 0.3-10 keV)\n\nSource 5:\n  RA (J2000.0):  11.1918  =  00:44:46.04\n  Dec (J2000.0): -49.9995  =  -49:59:58.1\n  Error: 9.8 arcsec (radius, 90% conf.)\n  Count-rate: (5.5 [+4.0, -2.7])e-3 ct s^-1   \n  Distance: 538 arcsec from MAXI position.\n\nSource 6:\n  RA (J2000.0):  10.7329  =  00:42:55.89\n  Dec (J2000.0): -49.9464  =  -49:56:47.0\n  Error: 12.4 arcsec (radius, 90% conf.)\n  Count-rate: (9.5 [+5.8, -4.2])e-3 ct s^-1   \n  Distance: 1515 arcsec from MAXI position.\n\nThe results of the XRT-team automatic analysis of the tiled XRT\nobservations, including a position-specific upper limit calculator, are\navailable at http://www.swift.ac.uk/xrt_products/TILED_GRB00077.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 23935,
  "createdOn": 1551887023000,
  "email": "valerio.delia@ssdc.asi.it",
  "subject": "GRB 190305A: Swift-XRT observations",
  "submitter": "Valerio D'Elia at ASDC  <valerio.delia@ssdc.asi.it>",
  "eventId": "GRB 190305A"
}