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A Deep Extragalactic Survey with the ART-XC Telescope of the Spectrum-RG Observatory: Simulations and Expected Results

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Abstract

To choose the best strategy for conducting a deep extragalactic survey with the ART-XC X-ray telescope onboard the Spectrum–Röntgen–Gamma (SRG) observatory and to estimate the expected results, we have simulated the observations of a 1.1° × 1.1° field in the 5–11 and 8–24 keV energy bands. For this purpose, we have constructed a model of the active galactic nuclei (AGN) population that reflects the properties of the X-ray emission from such objects. The photons that “arrived” from these sources were passed through a numerical model of the telescope, while the resulting data were processed with the standard ART-XC data processing pipeline. We show that several hundred AGNs at redshifts up to z ≈ 3 will be detected in such a survey over 1.2 Ms of observations with the expected charged particle background levels. Among them there will be heavily obscured AGNs, which will allow a more accurate estimate of the fraction of such objects in the total population to be made. Source confusion is expected at fluxes below 2 × 10−14 erg s−1 cm−2 (5–11 keV). Since this value can exceed the source detection threshold in a deep survey at low particle background levels, it may turn out to be more interesting to conduct a survey of larger area (several square degrees) but smaller depth, obtaining a sample of approximately four hundred bright AGNs as a result.

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Authors and Affiliations

  1. Space Research Institute, Russian Academy of Sciences, Profsoyuznaya ul. 84/32, Moscow, 117997, Russia

    I. A. Mereminskiy, E. V. Filippova, R. A. Burenin, S. Yu. Sazonov, M. N. Pavlinsky, A. Yu. Tkachenko, I. Yu. Lapshov, A. E. Shtykovskiy & R. A. Krivonos

Authors
  1. I. A. Mereminskiy
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  2. E. V. Filippova
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  3. R. A. Burenin
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  4. S. Yu. Sazonov
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  5. M. N. Pavlinsky
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  6. A. Yu. Tkachenko
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  7. I. Yu. Lapshov
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  8. A. E. Shtykovskiy
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  9. R. A. Krivonos
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Correspondence to I. A. Mereminskiy.

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Original Russian Text © I.A. Mereminskiy, E.V. Filippova, R.A. Burenin, S.Yu. Sazonov, M.N. Pavlinsky, A.Yu. Tkachenko, I.Yu. Lapshov, A.E. Shtykovskiy, R.A. Krivonos, 2018, published in Pis’ma v Astronomicheskii Zhurnal, 2018, Vol. 44, No. 2, pp. 87–101.

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Mereminskiy, I.A., Filippova, E.V., Burenin, R.A. et al. A Deep Extragalactic Survey with the ART-XC Telescope of the Spectrum-RG Observatory: Simulations and Expected Results. Astron. Lett. 44, 67–80 (2018). https://doi.org/10.1134/S1063773718020044

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  • DOI: https://doi.org/10.1134/S1063773718020044

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