{
  "bibcode": "2008GCN..8497....1M",
  "body": "Sheila McBreen (UCD/MPE) and Chryssa Kouveliotou (NASA/MSFC)\nreport on behalf of the Fermi GBM Team:\n\n\"At 05:47:04.08 UT on 06 November 2008, the Fermi Gamma-Ray Burst Monitor\ntriggered on a soft, short event (trigger 247643225 / 081106241).\n\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 271.3, DEC = -16.2 (J2000 degrees,\nequivalent to 18 h 05 m, -16 d 12 '), with an uncertainty\nof 5.6 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror for soft localisations which is currently estimated\nto be 5 to 6 degrees). This position is consistent with SGR 1806-20.\nThe angle from the Fermi LAT boresight is 41 degrees.\n\nThe GBM light curve comprises a single peak with a duration of about 80 ms.\nThe time-averaged spectrum from T0-0.045 s to T0+0.035 s is\nadequately fit by a simple power law function with index -2.13 +/- 0.08.\n(chi squared 205.1, for 242 d.o.f.) The event fluence (10-100 keV)\nin this time interval is (7.9 +/- 0.3)E-8 erg/cm^2.\n\nAn optically thin thermal bremsstrahlung (OTTB) function\nfits the spectrum equally well (chi squared 203.9 for 242 d.o.f.)\nwith kT = 36.5 +/-3.9 keV.\n\nThe spectral analysis results presented above are preliminary,\nFinal results will be published in the GBM Magnetar catalog.\"",
  "circularId": 8497,
  "createdOn": 1226078807000,
  "email": "smcbreen@mpe.mpg.de",
  "subject": "SGR 1806-20: Fermi GBM detection",
  "submitter": "Sheila McBreen at MPE  <smcbreen@mpe.mpg.de>"
}