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H.E.S.S. observations of the flaring gravitationally lensed galaxy PKS 1830-211

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cris.lastimport.scopus2024-02-12T20:22:00Z
dc.abstract.enPKS 1830-211 is a known macrolensed quasar located at a redshift of z = 2.5. Its high-energy gamma-ray emission has been detected with the Fermi-Large Area Telescope (LAT) instrument and evidence for lensing was obtained by several authors from its high-energy data. Observations of PKS 1830-211 were taken with the High Energy Stereoscopic System (H.E.S.S.) array of Imaging Atmospheric Cherenkov Telescopes in 2014 August, following a flare alert by the Fermi-LAT Collaboration. The H.E.S.S observations were aimed at detecting a gamma-ray flare delayed by 20-27 d from the alert flare, as expected from observations at other wavelengths. More than 12 h of good-quality data were taken with an analysis threshold of ∼67 GeV. The significance of a potential signal is computed as a function of the date and the average significance over the whole period. Data are compared to simultaneous observations by Fermi-LAT. No photon excess or significant signal is detected. An upper limit on PKS 1830-211 flux above 67 GeV is computed and compared to the extrapolation of the Fermi-LAT flare spectrum.
dc.affiliationUniwersytet Warszawski
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dc.date.accessioned2024-01-25T03:07:50Z
dc.date.available2024-01-25T03:07:50Z
dc.date.copyright2019-04-10
dc.date.issued2019
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financeNie dotyczy
dc.description.number3
dc.description.versionORIGINAL_AUTHOR
dc.description.volume486
dc.identifier.doi10.1093/MNRAS/STZ1031
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/108403
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2019MNRAS.486.3886H
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages3886-3891
dc.rightsOther
dc.sciencecloudnosend
dc.titleH.E.S.S. observations of the flaring gravitationally lensed galaxy PKS 1830-211
dc.typeJournalArticle
dspace.entity.typePublication