{
  "bibcode": "2021GCN.30753....1R",
  "body": "O.J. Roberts (USRA/NASA-MSFC), R. Dunwoody (UCD), J. Mangan (UCD) report\non behalf of the Fermi Gamma-ray Burst Monitor Team:\n\n\"At 05:20:49.405 UT on 27 August 2021, the Fermi Gamma-Ray Burst\nMonitor triggered on an SGR-like burst from the direction of\nSGR J1555.2-5402 (trigger 651734454/bn210827223). The SGR burst was also\ndetected by Swift-BAT (Palmer, 2021, ATel 14887).\n\nThe on-ground calculated location, using the Fermi GBM trigger data, is\nconsistent with the Swift position and known position of the SGR.\n\nThe angle from the Fermi LAT boresight is 21 degrees.\n\nThe burst has a duration of about 0.024 s (8-200 keV).\n\nThe time-averaged spectrum from T+0.384s to T0+0.408s is best fit by a\nby a power law function with an exponential high-energy cutoff. The\npower law index is -0.41 +/- 0.65 and the cutoff energy,\nparameterized as Epeak, is 32 +/- 4 keV.\n\nThe event fluence (8-200 keV) from T0+0.384s to T0+0.408s is\n(3.123 +/- 0.336)E-08 erg/cm^2. The average photon flux in the\n8-200 keV band during this period is 31 +/- 3 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary.\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "circularId": 30753,
  "createdOn": 1630680850000,
  "email": "oliver.roberts@nasa.gov",
  "subject": "Fermi GBM observation of a burst from SGR J1555.2-5402",
  "submitter": "Oliver J Roberts at USRA/NASA  <oliver.roberts@nasa.gov>"
}