{
  "bibcode": "2009GCN..9932....1B",
  "body": "E.Bissaldi and D.Gruber (all MPE) \nreport on behalf of the Fermi GBM Team: \n\n\n\"At 09:20:33.67 UT on 25 September 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090925 (trigger 275563235 / 090925389).\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 333.2, DEC = +14.3 (J2000 degrees,\nequivalent to 22h 13m, 14d 18'), with an uncertainty\nof 4.5 degrees (radius, 1-sigma containment,\nstatistical only; there is additionally a systematic\nerror which is currently estimated to be 2 to 3 degrees).\n \nThe angle from the Fermi LAT boresight is 116 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GBM light curve consists of a FRED-like pulse\nwith a duration (T90) of about 50 s (8-1000 keV).\nThe time-averaged spectrum from T0-1 s to T0+20 s is\nadequately fit by a Band function with\nEpeak = 156 (+25/-20) keV, alpha = -0.60 (+0.14/-0.13),\nand beta = -1.91 (+0.07/-0.09) (C-stat 369 for 357 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(9.46 +/- 0.26)E-06 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+6 s in the 8-1000 keV band is 4.2 +/- 0.3 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog.\"",
  "circularId": 9932,
  "createdOn": 1253890443000,
  "email": "ebs@mpe.mpg.de",
  "subject": "GRB 090925: Fermi GBM detection",
  "submitter": "Elisabetta Bissaldi at MPE  <ebs@mpe.mpg.de>",
  "eventId": "GRB 090925"
}