The INTEGRAL complete sample of type 1 AGN

Molina, M., Bassani, L., Malizia, A., Stephen, J.B., Bird, A.J., Dean, A.J., Panessa, F., De Rosa, A. and Landi, R. (2009) The INTEGRAL complete sample of type 1 AGN. Monthly Notices of the Royal Astronomical Society, 399 (3), 1293-1306. (doi:10.1111/j.1365-2966.2009.15257.x).

Abstract

In this paper we discuss the broad-band X-ray characteristics of a complete sample of 36 type 1 active galactic nuclei (AGN), detected by INTEGRAL in the 20–40 keV band above the 5.5? level. We present, for all the objects in the sample, the broad-band (1–110 keV) spectral analysis obtained by using INTEGRAL/Swift/Burst Alert Telescope observations together with XMM–Newton, Chandra, ASCA and Swift/X-Ray Telescope data. We also present the general average properties of the sample, i.e. the distribution of photon indices, high-energy cut-offs, reflection fractions and absorption properties, together with an in-depth analysis of their parameter space. We find that the average Seyfert 1 power law has an index of 1.7 with a dispersion of 0.2. The mean cut-off energy is at around 100 keV, with most objects displaying Ec in the range 50–150 keV; the average amount of Compton reflection is 1.5 with a typical dispersion of 0.7. We do not find any convincing correlation between the various parameters, an indication that our analysis is not strongly dependent by the interplay between them. Finally, we investigate how the results presented in this work fit into current frameworks for AGN spectral modelling and cosmic diffuse X-ray background synthesis models

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Contributors

Author: A.J. Bird

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