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Very high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance

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cris.lastimport.scopus2024-02-12T19:59:56Z
dc.abstract.enWe report on the detection of very high energy (VHE; E > 100 GeV) γ-ray emission from the BL Lac objects KUV 00311-1938 and PKS 1440-389 with the High Energy Stereoscopic System (H.E.S.S.). H.E.S.S. observations were accompanied or preceded by multiwavelength observations with Fermi/LAT, XRT and UVOT onboard the Swift satellite, and ATOM. Based on an extrapolation of the Fermi/LAT spectrum towards the VHE γ-ray regime, we deduce a 95 per cent confidence level upper limit on the unknown redshift of KUV 00311-1938 of $z$ < 0.98 and of PKS 1440-389 of $z$ < 0.53. When combined with previous spectroscopy results, the redshift of KUV 00311-1938 is constrained to 0.51 ≤ $z$ < 0.98 and of PKS 1440-389 to 0.14 ⪅ $z$ < 0.53.
dc.affiliationUniwersytet Warszawski
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dc.date.accessioned2024-01-26T11:46:55Z
dc.date.available2024-01-26T11:46:55Z
dc.date.copyright2020-04-07
dc.date.issued2020
dc.description.accesstimeBEFORE_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.number4
dc.description.versionORIGINAL_AUTHOR
dc.description.volume494
dc.identifier.doi10.1093/MNRAS/STAA999
dc.identifier.issn0035-8711
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/124618
dc.identifier.weblinkhttp://adsabs.harvard.edu/abs/2020MNRAS.494.5590A
dc.languageeng
dc.pbn.affiliationastronomy
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.pages5590-5602
dc.rightsOther
dc.sciencecloudnosend
dc.titleVery high energy γ-ray emission from two blazars of unknown redshift and upper limits on their distance
dc.typeJournalArticle
dspace.entity.typePublication