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Searching for new extragalactic gamma-ray sources in the GeV band aiming to study cross-correlation with astrophysical neutrinos and cosmic rays

Grant number: 17/00517-4
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): May 01, 2017
Effective date (End): June 30, 2020
Field of knowledge:Physical Sciences and Mathematics - Astronomy - Extragalactic Astrophysics
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Marcelo Moraes Guzzo
Grantee:Bruno Sversut Arsioli
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


The detection of astrophysical neutrinos by the IceCube Collaboration (Aartsen et al., 2013) triggered numerous efforts to identify their origins. These observations add up to hundreds of ultra high-energy cosmic rays (UHECR) observed over the last decades, whose distribution -in both cases- are mainly isotropic and suggests extragalactic origin. In this context, High Synchrotron Peak (HSP) blazes represent natural candidates for the association, since they are the dominant extragalactic sources at high-energies GeV to TeV, and are detected with high-fluence.The project aims to explore the possible connection between blazars and astroparticles, first focusing on new detections of extreme blazars in the E > 10 GeV and E > 50 GeV energy bands, based on observations with the Fermi-LAT satellite. The spatial correlation between GeV sources with astrophysical neutrinos and UHECR will be studied (e.g. Kadler et al. 2016, Resconi et al. 2016, and Padovani et al. 2016) taking into account high-fluence blazars, transient gamma-ray events (flares), and blazars as neutrino + UHECR counterparts.A multifrequency approach will be used to reveal new gamma-sources -continuous and transient- expanding preliminary works where more than 150 new detections in the 0.3-500 GeV band were described (Arsioli & Chang 2016, Arsioli et. al. 2017). In fact, the discovery of new gamma-sources plays a fundamental role for the correlation tests with astroparticles, an approach in tight connection with the scientific motivations and expertise of the postdoc candidate. (AU)

Scientific publications (6)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ARSIOLI, B.; CHANG, Y-L; MUSIIMENTA, B. Extreme and high synchrotron peak blazars beyond 4FGL: The 2BIGB gamma-ray catalogue. Monthly Notices of the Royal Astronomical Society, v. 493, n. 2, p. 2438-2451, APR 2020. Web of Science Citations: 0.
CHANG, Y. -L.; ARSIOLI, B.; GIOMMI, P.; PADOVANI, P.; BRANDT, C. H. The 3HSP catalogue of extreme and high-synchrotron peaked blazars. Astronomy & Astrophysics, v. 632, DEC 3 2019. Web of Science Citations: 1.
ARSIOLI, B.; BARRES DE ALMEIDA, U.; PRANDINI, E.; FRAGA, B.; FOFFANO, L. Extreme- and high-synchrotron-peaked blazars at the limit of Fermi-LAT detectability: the gamma-ray spectrum of 1BIGB sources. Monthly Notices of the Royal Astronomical Society, v. 480, n. 2, p. 2165-2177, OCT 2018. Web of Science Citations: 3.
PADOVANI, P.; GIOMMI, P.; RESCONI, E.; GLAUCH, T.; ARSIOLI, B.; SAHAKYAN, N.; HUBER, M. Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source. Monthly Notices of the Royal Astronomical Society, v. 480, n. 1, p. 192-203, OCT 2018. Web of Science Citations: 30.
ARSIOLI, B.; CHANG, Y-L. The gamma-ray emitting region in low synchrotron peak blazars Testing self-synchrotron Compton and external Compton scenarios. Astronomy & Astrophysics, v. 616, AUG 17 2018. Web of Science Citations: 1.
ARSIOLI, B.; POLENTA, G. A complete sample of LSP blazars fully described in gamma-rays New gamma-ray detections and associations with Fermi-LAT. Astronomy & Astrophysics, v. 616, AUG 7 2018. Web of Science Citations: 0.

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