{
  "subject": "GRB 110428A: Fermi-GBM observation",
  "eventId": "GRB 110428A",
  "bibcode": "2011GCN.12012....1T",
  "createdOn": 1304706350000,
  "circularId": 12012,
  "submitter": "David Tierney at UCD  <david.tierney@ucd.ie>",
  "email": "david.tierney@ucd.ie",
  "body": "D. Tierney (UCD) and G. Fitzpatrick (UCD)\nreport on behalf of the Fermi GBM Team: \n\n\"At 09:18:30.41 UT on 28 April 2011, the Fermi Gamma-Ray Burst Monitor\ntriggered and located GRB 110428A (trigger 325675112 / 110428388)\nwhich was also detected by the Fermi-LAT \n(V. Vasileiou et al. 2011, GCN 11982),\nKonus-Wind (S. Golenetskii et al. 2011, GCN 11983),\nand Suzaku WAM (W. Iwakiri et al. 2011, GCN 11988).\nThe GBM on-ground location is consistent with the Swift-XRT position\n(A. Melandri et al. 2011, GCN 11984).\n\nThe GBM light curve consists of a single pulse\nwith a duration (T90) of 5.6 +/- 0.2 s (50-300 keV). \nThe time-averaged spectrum from T0+1.8 s to T0+9 s is \nbest fit by a Band function with Epeak = 175.60 (+3.95/-3.82) keV, \nalpha = -0.20 (+0.03/-0.03), and beta = -2.88 (+0.10/-0.12)\n(C-Stat 559.66 for 482 d.o.f.).\n\nThe event fluence (10-1000 keV) in this time interval is \n(2.27 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured \nstarting from T0+7 s in the 10-1000 keV band \nis 26.8 +/- 0.4 ph/s/cm^2.\n\n\nThe spectral analysis results presented above are preliminary; \nfinal results will be published in the GBM GRB Catalog.\""
}