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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/043/0004

    • Keywords

       

      Galaxies: active; galaxies: individual (NGC 4941); X-rays: galaxies.

    • Abstract

       

      We present the results obtained from timing and spectral studies of the highly obscured low luminosity active galactic nucleus NGC 4941 using data obtained from the nuclear spectroscopic telescope array and the Neil Gehrels Swift observatories. We find similar variability in 3–10 keV and 10–60 keVenergy ranges with fractional rms variability of $\sim$14%. We investigate broad-band spectral properties of the source in 3–150 keV range, using data from NuSTAR and Swift/BAT, with phenomenological slab model and physically motivated mytorus model. From the spectral analysis, we find heavy obscuration with global average column density of the obscured material as $3.09^{+1.68}_{-1.01}\times 10^{-24}$ cm$^{-2}$. Evidence of a strong reflectioncomponent is observed in the spectrum. We detect a strong iron line with equivalent width of $\sim$1 keV. From the slab model, we obtain the exponential cutoff energy as $177^{+92}_{-16}$ keV. From this, we estimate the Comptoncloud properties with the hot electron temperature $kT_e= 59^{+31}_{-5}$ keV and the optical depth s $\tau=2.7^{+0.2}_{-1.6}$.

    • Author Affiliations

       

      ARGHAJIT JANA1 SACHINDRA NAIK1 NEERAJ KUMARI1 2

      1. Department of Astronomy and Astrophysics, Physical Research Laboratory, Ahmedabad 380009, India.
      2. Department of Physics, Indian Institute of Technology, Gandhinagar 382355, India.
    • Dates

       
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