GRB 081024B and GRB 140402A: two additional short GRBs from binary neutron star mergers
| Autor: | Aimuratov, Y., Ruffini, R., Muccino, M., Bianco, C. L., Penacchioni, A. V., Pisani, G. B., Primorac, D., Rueda, J. A., Wang, Y. |
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| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | ApJ, 844 (2017) 83 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/1538-4357/aa7a9f |
| Popis: | Theoretical and observational evidences have been recently gained for a two-fold classification of short bursts: 1) short gamma-ray flashes (S-GRFs), with isotropic energy $E_{iso}<10^{52}$~erg and no BH formation, and 2) the authentic short gamma-ray bursts (S-GRBs), with isotropic energy $E_{iso}>10^{52}$~erg evidencing a BH formation in the binary neutron star merging process. The signature for the BH formation consists in the on-set of the high energy ($0.1$--$100$~GeV) emission, coeval to the prompt emission, in all S-GRBs. No GeV emission is expected nor observed in the S-GRFs. In this paper we present two additional S-GRBs, GRB 081024B and GRB 140402A, following the already identified S-GRBs, i.e., GRB 090227B, GRB 090510 and GRB 140619B. We also return on the absence of the GeV emission of the S-GRB 090227B, at an angle of $71^{\rm{o}}$ from the \textit{Fermi}-LAT boresight. All the correctly identified S-GRBs correlate to the high energy emission, implying no significant presence of beaming in the GeV emission. The existence of a common power-law behavior in the GeV luminosities, following the BH formation, when measured in the source rest-frame, points to a commonality in the mass and spin of the newly-formed BH in all S-GRBs. Comment: 16 pages, submitted to ApJ, second version addressing the comments by the referee |
| Databáze: | arXiv |
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