TITLE: GCN CIRCULAR NUMBER: 45093 SUBJECT: GRB 260706A: Fermi GBM Observation DATE: 26/07/06 20:28:09 GMT FROM: atrigg2@lsu.edu A. C. Trigg (NPP ORAU, NASA MSFC) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "At 16:12:21.43 UT on 06 July 2026, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 260706A (trigger 805047146/260706675), which was also detected by SVOM/ECLAIRs (J. Alaux et al. 20026, GCN 45089). The Fermi GBM on-ground location is consistent with the SVOM/ELCAIRs position. The angle from the Fermi LAT boresight is 43 degrees. The GBM light curve displays two peaks with a duration (T90) of about 17 s (50-300 keV). The time-averaged spectrum from T0+0.001 to T0+30.616 s is best fit by a power law function with an exponential high-energy cutoff. The power law index is -1.13 +/- 0.01 and the cutoff energy, parameterized as Epeak, is 47.1 +/- 0.6 keV. The event fluence (10-1000 keV) in this time interval is (3.18 +/- 0.08)E-06 erg/cm^2. The 1-sec peak photon flux measured starting from T0+15 s in the 10-1000 keV band is 5.3 +/- 0.3 ph/s/cm^2. A Band function fits the spectrum equally well with Epeak= 39.1 +/- 0.5 keV, alpha = -0.71 +/- 0.01 and beta = -2.63 +/- 0.03. The spectral analysis results presented above are preliminary; final results will be published in the GBM GRB Catalog: https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html For Fermi GBM data and info, please visit the official Fermi GBM Support Page: https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/" View this GCN Circular online at https://gcn.nasa.gov/circulars/45093. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...