2017ApJ...836..116M -
Astrophys. J., 836, 116-116 (2017/February-2)
X-ray spectral properties of seven heavily obscured Seyfert 2 galaxies.
MARCHESI S., AJELLO M., COMASTRI A., CUSUMANO G., LA PAROLA V. and SEGRETO A.
Abstract (from CDS):
We present the combined Chandra and Swift-BAT spectral analysis of seven Seyfert 2 galaxies selected from the Swift-BAT 100 month catalog. We selected nearby (z <= 0.03) sources lacking a ROSAT counterpart that never previously been observed with Chandra in the 0.3-10 keV energy range, and targeted these objects with 10 ks Chandra ACIS-S observations. The X-ray spectral fitting over the 0.3-150 keV energy range allows us to determine that all the objects are significantly obscured, with NH >= 1023 cm–2 at a >99% confidence level. Moreover, one to three sources are candidate Compton-thick Active Galactic Nuclei (CT-AGNs; i.e., NH >= 1024 cm–2). We also test the recent spectral curvature method developed by Koss et al. to find candidate CT-AGNs, finding a good agreement between our results and their predictions. Because the selection criteria we adopted were effective in detecting highly obscured AGNs, further observations of these and other Seyfert 2 galaxies selected from the Swift-BAT 100 month catalog will allow us to create a statistically significant sample of highly obscured AGNs, therefore providing a better understanding of the physics of the obscuration processes.
Abstract Copyright:
© 2017. The American Astronomical Society. All rights reserved.
Journal keyword(s):
galaxies: active - galaxies: nuclei - X-rays: galaxies - X-rays: galaxies
Simbad objects:
7
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