{
  "bibcode": "2012GCN.13699....1D",
  "body": "P. D'Avanzo, A. Melandri, S. Campana (INAF-OAB) report on behalf of the\nSwift team:\n\nThe Swift XRT observed the error circle of the INTEGRAL-detected GRB\n120821A (Mereghetti et al, GCN Circ. 13696) from 15.2 to 17.2 ks after the\ntrigger. The data comprise 2.0 ks of Photon Counting (PC) mode data. No\nclear afterglow candidate is detected. We note however the presence of a\nvery faint and low-significance source within the INTEGRAL error circle\n(Mereghetti et al, GCN Circ. 13696) at the following position: RA, Dec\n=255.25762, -40.51365 which is equivalent to:\n\nRA (J2000): 17h 01m 01.83s\nDec (J2000): -40d 30' 49.1\"\n\nwith an uncertainty of 6.7 arcsec (radius, 90% confidence).\n\nThe source has a count rate of (4.5 +/- 2.1) x 10^-3 cts/s. This\ncorresponds to an observed 0.3-10 keV flux of (2.7 +/- 1.2) x 10^-13\nerg/cm2/s (assuming a typical GRB spectrum with photon spectral index of\n2). If we consider the Galactic absorption in this direction (1.1 x 10^22\ncm^-2; Kalberla et al. 2005) this corresponds to an unabsorbed flux of\n(5.5 +/- 2.5) x 10^-12 erg/cm2/s. Given the limited statistics, it is not\npossible to determine whether the source is fading.",
  "circularId": 13699,
  "createdOn": 1345637146000,
  "email": "paolo.davanzo@brera.inaf.it",
  "subject": "GRB 120821A: Swift/XRT observations",
  "submitter": "Paolo D'Avanzo at INAF-OAB  <paolo.davanzo@brera.inaf.it>",
  "eventId": "GRB 120821A"
}