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- W3100911091 abstract "Context. Fast Radio Bursts (FRBs) are millisecond-long bursts uniquely detected at radio frequencies. FRB 131104 is the only case for which a $gamma$-ray transient positionally and temporally consistent was claimed. This high-energy transient had a duration of $sim400$~s and a 15-150~keV fluence $S_{gamma}sim4times10^{-6}$ erg $mathrm{cm}^{-2}$. However, the association with the FRB is still debated. Aims. We aim at testing the systematic presence of an associated transient high-energy counterpart throughout a sample of the FRB population. Methods. We used an approach like that used in machine learning methodologies to accurately model the highly-variable Fermi/GBM instrumental background on a time interval comparable to the duration of the proposed $gamma$-ray counterpart of FRB 131104. A possible $gamma$-ray signal is then constrained considering sample average lightcurves. Results. We constrain the fluence of the possible $gamma$-ray signal in the 8-1000 keV band down to $6.4 times 10^{-7}$ ($7.1 times 10^{-8}$) erg cm$^{-2}$ for a 200-s (1-s) integration time. Furthermore, we found the radio-to-gamma fluence ratio to be $eta>10^{8}$ Jy ms erg$^{-1}$ cm$^2$. Conclusions. Our fluence limits exclude $sim 94%$ of Fermi/GBM detected long gamma-ray bursts and $sim 96%$ of Fermi/GBM detected short gamma-ray bursts. In addition, our limits on the radio-to-gamma fluence ratio point to a different emission mechanism from that of magnetar giant flares. Finally, we exclude a $gamma$-ray counterpart as fluent as the one possibly associated with FRB 131104 to be a common feature of FRBs." @default.
- W3100911091 created "2020-11-23" @default.
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- W3100911091 date "2019-10-22" @default.
- W3100911091 modified "2023-09-29" @default.
- W3100911091 title "A cumulative search for hard X/<i>γ</i>-ray emission associated with fast radio bursts in <i>Fermi</i>/GBM data" @default.
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- W3100911091 doi "https://doi.org/10.1051/0004-6361/201936284" @default.
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