| Full text | |
| Author(s): |
Total Authors: 3
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| Affiliation: | [1] ICRANet, Piazza Repubbl 10, I-65122 Pescara - Italy
[2] Univ Estadual Campinas, Inst Nsica Gleb Walaghin, UNICAMP, Rua Sergio Buarque de Holanda 777, Campinas - Brazil
[3] Shanghai Jiao Tong Univ, Tsung Dao Lee Inst, 800 Dongchuan RD, Shanghai 200240 - Peoples R China
[4] Mbarara Univ Sci & Technol, Dept Phys, POB 1410, Mbarara - Uganda
Total Affiliations: 4
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| Document type: | Journal article |
| Source: | Monthly Notices of the Royal Astronomical Society; v. 493, n. 2, p. 2438-2451, APR 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
This paper presents the results of a gamma-ray likelihood analysis over all the extreme and high synchrotron peak blazars (EHSP and HSP) from the 3HSP catalogue. We investigate 2013 multifrequency positions under the eyes of Fermi Large Area Telescope, considering 11 yr of observations in the energy range between 500MeV and 500 GeV, which results in 1160 gamma-ray signatures detected down to the TS = 9 threshold. The detections include 235 additional sources concerning the Fermi Large Area Telescope Fourth Source Catalog (4FGL), all confirmed via high-energy TS (Test Statistic) maps, and represent an improvement of similar to 25 per cent for the number of EHSP and HSP currently described in gamma-rays. We build the gamma-ray spectral energy distribution (SED) for all the 1160 2BIGB sources, plot the corresponding gamma-ray logN-logS, and measure their total contribution to the extragalactic gamma-ray background, which reaches up to similar to 33 per cent at 100 GeV. Also, we show that the gamma-ray detectability improves according to the synchrotron peak flux as represented by the figure of merit parameter, and note that the search for TeV peaked blazars may benefit from considering HSP and EHSP as a whole, instead of EHSPs only. The 2BIGB acronym stands for `Second Brazil-ICRANet Gamma-ray Blazars' catalogue, and all the broad-band models and SED data points will be available on public data repositories (OpenUniverse, GitHub, and Brazilian Science Data Center-BSDC). (AU) | |
| FAPESP's process: | 17/00517-4 - Searching for new extragalactic gamma-ray sources in the GeV band aiming to study cross-correlation with astrophysical neutrinos and cosmic rays |
| Grantee: | Bruno Sversut Arsioli |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |