Browsing by Subject "Extragalactic background light"

Now showing items 1-3 of 3

    • Gamma-rays from the quasar PKS 1441+25: story of an escape 

      Connolly, M.P.; Gillanders, Gary; Lang, Mark (2015-12-20)
      Outbursts from gamma-ray quasars provide insights on the relativistic jets of active galactic nuclei and constraints on the diffuse radiation fields that fill the universe. The detection of significant emission above 100 ...

    • The most powerful flaring activity from the NLSyl PMN J0948+0022 

      Moriarty, P.; Gillanders, Gary; Lang, Mark (Oxford University Press, 2015-01-21)
      We report on multifrequency observations performed during 2012 December-2013 August of the first narrow-line Seyfert 1 galaxy detected in gamma-rays, PMN J0948+0022 (z = 0.5846). A y -ray flare was observed by the Large ...

    • VERITAS observations of the BL Lac object PG 1553+113 

      Connolly, M.P.; Gillanders, Gary; Moriarty, P.; Lang, Mark (American Astronomical Society, 2015-01-20)
      We present results from VERITAS observations of the BL Lac object PG 1553+113 spanning the years 2010, 2011, and 2012. The time-averaged spectrum, measured between 160 and 560 GeV, is well described by a power law with a ...