X-ray emission of Seyfert 2 galaxy MCG-01-24-12

Journal
ASTRONOMY & ASTROPHYSICS
Date Issued
2021
Author(s)
Middei, R.
•
Matzeu, G. A.
•
BIANCHI, SIMONE
•
BRAITO, Valentina
•
Reeves, J.
•
•
•
Marinucci, A.
•
•
Zaino, A.
DOI
Abstract
We present a detailed X-ray spectral analysis of the nearby Seyfert 2 galaxy MCG-01-24-12 based on a multi-epoch data set. Data were obtained with different X-ray satellites, namely XMM-Newton, NuSTAR, Swift, and Chandra, and cover different time intervals, from a few days to years. From 2006 to 2013 the source had a 2-10 keV flux of ∼1.5 × 10−11 erg cm−2 s−1, consistent with archival observations based on HEAO and BeppoSAX data, though a 2019 Chandra snapshot caught the source in an extreme low flux state a factor of ∼10 fainter than its historical level. Based on phenomenological and physically motivated models, we find the X-ray spectrum of MCG-01-24-12 to be best modelled by a power-law continuum emission with Γ = 1.76 ± 0.09 with a high energy cut-off at Ec = 70−14+21 keV that is absorbed by a fairly constant column density of NH = (6.3 ± 0.5) × 1022 cm−2. These quantities allowed us to estimate the properties of the hot corona in MCG-01-24-12 for the cases of a spherical or slab-like hot Comptonising plasma to be kTe = 27−4+8 keV, τe = 5.5 ± 1.3 and kTe = 28−5+7 keV, τ = 3.2 ± 0.8, respectively. Finally, despite the short duration of the exposures, possible evidence of the presence of outflows is discussed.
Volume
647
Start page
A102
Uri
Url
Issn Identifier
0004-6361
Ads BibCode
2021A&A...647A.102M
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open.access
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