The hard X-ray spectrum of NGC 5506 as seen by NuSTAR

G. Matt, M. Balokovic, A. Marinucci, D. R. Ballantyne, S. E. Boggs, Finn Erland Christensen, A. Comastri, W. W. Craig, P. Gandhi, C. J. Hailey

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NuSTAR observed the bright Compton-thin, narrow-line Seyfert 1 galaxy, NGC 5506, for about 56 ks. In agreement with past observations, the spectrum is well fitted by a power law with Γ∼ to 1.9, a distant reflection component and narrow ionized iron lines. A relativistically blurred reflection component is not required by the data. When an exponential high-energy cutoff is added to the power law, a value of 720+130/-190 keV (90 per cent confidence level) is found. Even allowing for systematic uncertainties, we find a 3 sigma lower limit to the high-energy cutoff of 350 keV, the highest lower limit to the cutoff energy found so far in an AGN by NuSTAR.
Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Issue number4
Pages (from-to)3029-3033
Publication statusPublished - 2015


  • Accretion, accretion discs
  • Galaxies: active
  • Galaxies: individual: NGC 5506


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