Browsing Faculty of Natural and Agricultural Sciences by Subject "galaxies: BL Lacertae objects: individual: PG 1553+113"

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    • HESS observations and VLT spectroscopy of PG 1553+113 

      Aharonian, F.; Büshing, I.; De Jager, O.C.; Holleran, M.; Raubenheimer, B.C.; Venter, C.; H.E.S.S. Collaboration (EDP Sciences, 2008)
      Aims.The properties of the very high energy (VHE; GeV) γ-ray emission from the high-frequency peaked BL Lac PG 1553+113 are investigated. An attempt is made to measure the currently unknown redshift of this object. Methods.VHE ...