BAT AGN Spectroscopic Survey. V. X-Ray Properties of the Swift/BAT 70-month AGN Catalog

2017/09/30 by Claudio Ricci, C. Ricci, B. Trakhtenbrot +39 · 2 citations
Physics and Astronomy · #Accretion (finance) #Accretion disc #Active galactic nucleus #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Cutoff #Galaxies: Formation, Evolution, Phenomena #Galaxy #Photon #Reflection (computer programming) #Supermassive black hole #astro-ph.CO #astro-ph.GA #astro-ph.HE

paper · pdf · doi:10.3847/1538-4365/aa96ad

ApJS in press. The full tables will be available on ApJS and the on the BASS website [www.bass-survey.com] once the paper is published

openalex created_date 2017/09/25 · arxiv created 2017/11/28 · openalex publication_date 2017/12/01 · arxiv updated 2017/12/20 · openalex updated_date 2026/08/06

Abstract

Abstract Hard X-ray (≥10 keV) observations of active galactic nuclei (AGNs) can shed light on some of the most obscured episodes of accretion onto supermassive black holes. The 70-month Swift /BAT all-sky survey, which probes the 14–195 keV energy range, has currently detected 838 AGNs. We report here on the broadband X-ray (0.3–150 keV) characteristics of these AGNs, obtained by combining XMM-Newton , Swift /XRT, ASCA , Chandra , and Suzaku observations in the soft X-ray band ( keV) with 70-month averaged Swift /BAT data. The nonblazar AGNs of our sample are almost equally divided into unobscured ( ) and obscured ( ) AGNs, and their Swift /BAT continuum is systematically steeper than the 0.3–10 keV emission, which suggests that the presence of a high-energy cutoff is almost ubiquitous. We discuss the main X-ray spectral parameters obtained, such as the photon index, the reflection parameter, the energy of the cutoff, neutral and ionized absorbers, and the soft excess for both obscured and unobscured AGNs.

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