Search for high-redshift blazars with Fermi/LAT

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dc.contributor.authorKreter, Michael
dc.contributor.authorKadler, Matthias
dc.contributor.authorKrauß, Felicia
dc.contributor.authorBuson, Sara
dc.contributor.authorOjha, Roopesh
dc.contributor.authorWilms, Jörn
dc.contributor.authorBöttcher, Markus
dc.contributor.authorFermi/LAT Collaboration
dc.date.accessioned2020-04-28T17:25:25Z
dc.date.available2020-04-28T17:25:25Z
dc.date.issued2019-07-24
dc.description36th International Cosmic Ray Conference -ICRC2019- July 24th - August 1st, 2019 Madison, WI, U.S.A.en_US
dc.description.abstractHigh-redshift blazars (z ≥ 2.5) are one of the most powerful classes of γ-ray sources in the Universe. These objects possess the highest jet powers and luminosities and have black-hole masses often in excess of 10⁹ solar masses. In addition, high-redshift blazars are important cosmological probes and serve as test objects for blazar evolution models. Due to their large distance, their high-energy emission peaks are often downshifted to energies below the GeV range, which makes them difficult to study with Fermi/LAT and only the very brightest objects are detectable. Hence, only a small number of high-redshift blazars could be detected with Fermi/LAT so far. In this work, we present a strategy to increase the detection statistics at redshift z ≥ 2.5 via a search for flaring events in high-redshift γ-ray blazars whose long-term flux is just below the sensitivity limit of Fermi/LAT. Seven previously GeV undetected high-redshift blazars have been identified from their bright monthly outburst periods, while more detections are expected in the future.en_US
dc.description.urihttps://pos.sissa.it/358/573/pdfen_US
dc.format.extent7 pagesen_US
dc.genreconference papers and proceedingsen_US
dc.identifierdoi:10.13016/m2dliw-6wbr
dc.identifier.citationKreter, Michael; Kadler, Matthias; Krauß, Felicia; Buson, Sara; Ojha, Roopesh; Fermi/LAT Collaboration; Wilms, Jörn; Böttcher, Markus; Search for high-redshift blazars with Fermi/LAT; 36th International Cosmic Ray Conference -ICRC2019; https://pos.sissa.it/358/573/pdfen_US
dc.identifier.urihttp://hdl.handle.net/11603/18358
dc.language.isoen_USen_US
dc.publisherProceedings of Scienceen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Physics Department Collection
dc.relation.ispartofUMBC Center for Space Sciences and Technology (CSST) / Center for Research and Exploration in Space Sciences & Technology II (CRSST II)
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.titleSearch for high-redshift blazars with Fermi/LATen_US
dc.typeTexten_US

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