Update of the INTEGRAL/IBIS active galactic nuclei catalogue: deeper on the galactic plane and wider beyond
Update of the INTEGRAL/IBIS active galactic nuclei catalogue: deeper on the galactic plane and wider beyond
In this work we have updated the list of active galactic nuclei (AGN) detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN, increasing the number of INTEGRAL-detected active galaxies (436) by 19%. Half of these new additions are located behind the Galactic plane, and for most of them we have full X-ray coverage, obtained through archival data from Swift/XRT, XMM-Newton, and NuSTAR. The soft X-ray data allowed us to associate each high-energy emitter with a single or multiple X-ray counterpart(s) and characterise the spectral shape of these new AGN by estimating the photon index, the intrinsic absorption, and the 2-10 keV flux. A few cases where two soft X-ray counterparts fall within the INTEGRAL error circle and at least one is classified as an AGN have been found and discussed in detail. Thirty-four sources originally listed as AGN candidates or unidentified objects have been recognised as AGN by employing three diagnostic tests: WISE colours, radio emission, and morphology. For 12 sources among the 34 AGN candidates, we reduced the optical spectra and confirmed their AGN nature, providing also their optical class and redshift. This paper is part of an ongoing effort to keep the INTEGRAL AGN catalogue updated in order to provide the scientific community with a hard X-ray selected sample of well-classified and spectrally characterised active galaxies.
astro-ph.HE, Gamma rays: galaxies, X-rays: galaxies, Galaxies: active, Galaxies: Seyfert
Malizia, A.
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Bassani, L.
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Landi, R.
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Molina, M.
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Masetti, N.
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Palazzi, E.
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Bruni, G.
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Bazzano, A.
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Ubertini, P.
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Bird, A. J.
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Malizia, A.
d2120b69-7f7a-4ac7-895c-727c47419567
Bassani, L.
a36dbb20-53f2-4941-beb3-7afe7cb29a02
Landi, R.
b8243478-d7a1-4774-8a66-4158a65a33d3
Molina, M.
c1b0a4b1-4229-4ad1-b042-c744eebe7566
Masetti, N.
ff614e85-f185-4bf8-80d5-e60f5274eb53
Palazzi, E.
e9674d6b-8d34-4c1d-8ec0-0dd82392f18b
Bruni, G.
edb70209-3aab-4d47-a4d2-109cdf2c6bc4
Bazzano, A.
8eef0c6e-1a5f-4bcd-a034-9a5c3b29104d
Ubertini, P.
4e2d0b81-a5ad-4ef6-9278-6af29fff69a8
Bird, A. J.
045ee141-4720-46fd-a412-5aa848a91b32
Malizia, A., Bassani, L., Landi, R., Molina, M., Masetti, N., Palazzi, E., Bruni, G., Bazzano, A., Ubertini, P. and Bird, A. J.
(2023)
Update of the INTEGRAL/IBIS active galactic nuclei catalogue: deeper on the galactic plane and wider beyond.
Astronomy & Astrophysics, 671, [A152].
(doi:10.1051/0004-6361/202245495).
Abstract
In this work we have updated the list of active galactic nuclei (AGN) detected by INTEGRAL taking into account the new objects listed in the last published INTEGRAL/IBIS survey. We have collected 83 new AGN, increasing the number of INTEGRAL-detected active galaxies (436) by 19%. Half of these new additions are located behind the Galactic plane, and for most of them we have full X-ray coverage, obtained through archival data from Swift/XRT, XMM-Newton, and NuSTAR. The soft X-ray data allowed us to associate each high-energy emitter with a single or multiple X-ray counterpart(s) and characterise the spectral shape of these new AGN by estimating the photon index, the intrinsic absorption, and the 2-10 keV flux. A few cases where two soft X-ray counterparts fall within the INTEGRAL error circle and at least one is classified as an AGN have been found and discussed in detail. Thirty-four sources originally listed as AGN candidates or unidentified objects have been recognised as AGN by employing three diagnostic tests: WISE colours, radio emission, and morphology. For 12 sources among the 34 AGN candidates, we reduced the optical spectra and confirmed their AGN nature, providing also their optical class and redshift. This paper is part of an ongoing effort to keep the INTEGRAL AGN catalogue updated in order to provide the scientific community with a hard X-ray selected sample of well-classified and spectrally characterised active galaxies.
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2301.09999v1
- Author's Original
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aa45495-22
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Accepted/In Press date: 24 January 2023
e-pub ahead of print date: 17 March 2023
Additional Information:
Funding Information:
The authors acknowledge financial support from ASI under contract n. 2019-35-HH.0. This research has made use of the NASA/IPAC Extragalactic Database (NED) and NASA/IPAC Infrared Science Archive, which are operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This work made use of observations collected at the European Southern Observatory under ESO programs 0103.A-0521(A), 0102.D-0918(A), 0102.A-0433(A), and 0101.A-0765(A). The authors thank the anonymous referee for the useful comments.
Publisher Copyright:
© 2023 The Authors.
Keywords:
astro-ph.HE, Gamma rays: galaxies, X-rays: galaxies, Galaxies: active, Galaxies: Seyfert
Identifiers
Local EPrints ID: 478258
URI: http://eprints.soton.ac.uk/id/eprint/478258
ISSN: 0004-6361
PURE UUID: 027db145-6462-4558-8789-c5aaebcce7ee
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Date deposited: 26 Jun 2023 17:10
Last modified: 18 Mar 2024 02:39
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Contributors
Author:
A. Malizia
Author:
L. Bassani
Author:
R. Landi
Author:
M. Molina
Author:
N. Masetti
Author:
E. Palazzi
Author:
G. Bruni
Author:
A. Bazzano
Author:
P. Ubertini
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