{
  "bibcode": "2006GCN..4853....1D",
  "body": "Andrea De Luca (INAF/IASF, Milano) on behalf\nof a larger collaboration reports:\n\nWe have analyzed the XMM-Newton observation\nof the field of GRB060218, discovered by \nSwift/BAT on 2006, February 18 at 03:34:30 UT \n(GCN4775, Cusumano et al.)\n\nThe XMM-Newton observation started on 2006,\nFebruary 20 at 17:21:45 UT (~61.8 hours after\nthe GRB trigger) and lasted for 14 ks.\nThe observation is affected by a high\nparticle background, which hampers a detailed    \ntemporal and spectral analysis of the faint X-ray\nafterglow.\n\nWe report here on data collected by the EPIC/pn camera.\nspanning the time range 223.9-234.9 ks after the trigger.\n\nThe afterglow of GRB060218 is detected at the \nfollowing coordinates: \nRA(J2000): 03h 21m 39.63s, Dec(J2000): 16d 52' 03.4\"\nwith an uncertainty of 1.2 arcsec (1sigma),\nfully consistent with the coordinates of the \noptical (GCN4779, Marshall et al.) and radio \n(GCN4828, Soderberg & Frail) afterglow, as well as \nwith the Swift/XRT position (GCN4786, Cusumano et al.).\n\nExtracting source events from a circle of 10 arcsec\nradius (containing ~50% of the total counts) the pn\ntime-averaged, background-subtracted count rate in the \n0.5-8 keV range is of 0.017+/-0.002 cts/s.\nNo significant fading of the X-ray flux is detected along\nthe XMM-Newton observation.\n\nThe time-integrated X-ray spectrum is well fit \n(reduced chi2=0.98, 14 d.o.f.) by a steep power\nlaw absorbed by the Galactic column (NH=1.1e21 cm^-2,\nDickey & Lockman, 1990), with a photon index Gamma=3.3+/-0.6 \n(90% conf. level for a single parameter). \nThe observed flux (0.5-10 keV) is of 5.7x10^-14 erg \ncm^-2 s^-1, corresponding to an unabsorbed flux of \n8.4x10^-14 erg cm^-2 s^-1.",
  "circularId": 4853,
  "createdOn": 1141673293000,
  "email": "deluca@iasf-milano.inaf.it",
  "subject": "GRB060218: analysis of the XMM-Newton observation",
  "submitter": "Andrea De Luca at IASF-CNR,Milano  <deluca@iasf-milano.inaf.it>",
  "eventId": "GRB 060218"
}