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.
- Accretion, accretion discs
- Galaxies: active
- Galaxies: individual: NGC 5506
Matt, G., Balokovic, M., Marinucci, A., Ballantyne, D. R., Boggs, S. E., Christensen, F. E., Comastri, A., Craig, W. W., Gandhi, P., & Hailey, C. J. (2015). The hard X-ray spectrum of NGC 5506 as seen by NuSTAR. Monthly Notices of the Royal Astronomical Society, 447(4), 3029-3033. https://doi.org/10.1093/mnras/stu2653