{
  "bibcode": "2008GCN..8620....1M",
  "body": "V. Mangano, B. Sbarufatti, V. La Parola (INAF IASF PA),\nand W. H. Baumgartner (GSFC/UMBC)\nreport on behalf the Swift XRT team:\n\nThe Swift ToO observation of GRB 081204 started on 2008 Dec 4th\nat 19:32 UT consists of 3.6 ks XRT exposure in PC mode.\nWe confirm the detection of the previously reported afterglow\ncandidate (Mangano et al., GRC Circ. #8616) at the refined position\nRA, Dec = 349.7880, -60.2255 which is equivalent to:\n\nRA (J2000):   23 19 09.13 \nDec (J2000): -60 13 31.7\n\nwith an uncertainty of 5.3 arcsec (radius, 90% confidence).\nThis is 30 arcsec from the INTEGRAL position (Gotz, GCN Circ. #8614).\nThe source is fading with a power law decay index of about -2,\nand will reach a level of about 5.0e-4 counts/s in 24 hours\nfrom the trigger.\n\nThe average spectrum accumulated in the time interval from\n10 ks to 37 ks after the event was fitted, using Cash\nstatistics, with an absorbed power law. The best fit photon\nindex is 2.7 � 1.5. The spectrum shows evidence of absorption\nat the level of (4.4 � 4.0)e21 cm-2, in excess of the\nestimated Galactic value (1.89e+20 cm-2, Kalberla et al. 2005). \nThe average observed[unabsorbed] 0.3-10 keV average flux is\nabout  2.7[8.5]e-13 ergs cm-2 s-1.\nThe count-rate-to-flux conversion factor is 1.5e-10.\n\nAll quoted errors are at 90% confidence level.\n\nThis circular is an official product of the Swift-XRT team.",
  "circularId": 8620,
  "createdOn": 1228486339000,
  "email": "vanessa@ifc.inaf.it",
  "subject": "GRB 081204: Swift XRT afterglow confirmation",
  "submitter": "Vanessa Mangano at INAF-IASFPA  <vanessa@ifc.inaf.it>",
  "eventId": "GRB 081204"
}