{
  "bibcode": "2009GCN..8803....1B",
  "body": "E. Bissaldi (MPE) and A. von Kienlin (MPE)\nreport on behalf of the Fermi GBM Team: \n\n\n\"At 07:57:23.11 UT on 12 January 2009, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 090112 (trigger 253439845 / 090112332).\nThe on-ground calculated location, using the GBM trigger\ndata, is RA = 111.8, DEC = -30.3 (J2000 degrees,\nequivalent to 07h 27m, -30d 17'), with an uncertainty\nof 1.7 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 4 degrees.\n\nThis burst was also independently detected by INTEGRAL SPI-ACS.\n\nThe GRB lightcurve consists of two peaks with some substructure\nappearing at T0 and T0+4 s, respectively. A possible precursor\nis present around T0-20 s and additional weak emission is visible\nup to T0+50s. The event duration (T90) is about 65 s (8-1000 keV)\nand T50 is about 27 s (8-1000 keV).\nThe time-averaged spectrum from T0-6 s to T0+18 s is\nbest fit by a Band function with Epeak =  150 +/- 40 keV,\nalpha = -0.94 +/- 0.20 and beta = -2.01 +/- 0.19\n(chi squared 464 for 456 d.o.f.).\n\nThe event fluence (8-1000 keV) in this time interval is\n(5.2 +/- 1.0)E-06 erg/cm^2. The 1-sec peak photon flux\nmeasured starting from T0+4 s in the 8-1000 keV band \nis 7 +/- 2 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": 8803,
  "createdOn": 1231865052000,
  "email": "ebs@mpe.mpg.de",
  "subject": "GRB 090112: Fermi GBM detection",
  "submitter": "Elisabetta Bissaldi at MPE  <ebs@mpe.mpg.de>",
  "eventId": "GRB 090112"
}