{
  "bibcode": "2023GCN.34094....1B",
  "subject": "GRB230626A: Fermi GBM Detection",
  "body": "S. Bala (USRA) and C. Meegan (UAH) report on behalf of\nthe Fermi Gamma-ray Burst Monitor Team:\n\n\"At 14:30:22.25 UT on 26 June 2023, the Fermi Gamma-ray Burst Monitor (GBM)\ntriggered and located GRB230626A (trigger 709482627/230626604).\n\nThe on-ground calculated location, using the Fermi GBM trigger data,\nis RA = 146.38, Dec = 0.09 (J2000 degrees, equivalent to\nJ2000 09h 45m, +00d 05'), with a statistical uncertainty of 1.0 degrees.\n(radius, 1-sigma containment, statistical only; there is additionally a\nsystematic error which we have characterized as a core-plus-tail model,\nwith 90% of GRBs having a 3.7 deg error and a small tail suffering a larger\nthan 10 deg systematic error [Connaughton et al. 2015, ApJS, 216, 32]).\n\nThe angle from the Fermi LAT boresight is 49 degrees.\n\nThe GBM light curve consists of two peaks (the second peak is found\nto be much brighter) with a duration (T90) of about 15 s (50-300 keV).\nThe time-averaged spectrum from T0-1.024 to T0+25.60 s is best fit by\na Band function with Epeak= 169 +/- 12 keV, alpha = -1.29 +/- 0.02\n and beta = -2.16 +/- 0.08.\n\nThe event fluence (10-1000 keV) in this time interval is\n(2.55 +/- 0.04)E-05 erg/cm^2. The 1-sec peak photon flux measured\nstarting from T0+11 s in the 10-1000 keV band is 35 +/- 0.5 ph/s/cm^2.\n\nThe spectral analysis results presented above are preliminary;\nfinal results will be published in the GBM GRB Catalog:\nhttps://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html\n\nFor Fermi GBM data and info, please visit the official Fermi GBM Support Page:\nhttps://fermi.gsfc.nasa.gov/ssc/data/access/gbm/\"",
  "submitter": "sumanbala2210@gmail.com",
  "eventId": "GRB 230626A",
  "createdOn": 1687884913069,
  "circularId": 34094
}