BeppoSAX observation of NGC 3079

Naoko Iyomoto; Yasushi Fukazawa; Naomasa Nakai; Yuko Ishihara

doi:10.1086/324056

BeppoSAX observation of NGC 3079

Naoko Iyomoto, Yasushi Fukazawa, Naomasa Nakai, Yuko Ishihara

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

Using the BeppoSAX observatory, we have observed a nearby LINER/Seyfert 2 galaxy, NGC 3079, which is known as an outflow galaxy and a bright H₂O maser source. Using the Phoswich Detection System, we have revealed that the NGC 3079 nucleus suffers from a Compton-thick absorption, with a hydrogen column density ∼10²⁵ cm^-2. After corrected the absorption, the 2-10 keV luminosity becomes 10⁴²-10⁴³ ergs s^-1 at a distance of 16 Mpc. It is 2-3 orders of magnitude higher than that observed in the Medium Energy Concentrator Spectrometer band (below 10 keV). We also detected a strong Fe K line at 6.4^+0.3_-0.2 keV with an equivalent width of 2.4^+2.9_-1.5 keV, which is consistent with the heavy absorption.

Original language	English
Pages (from-to)	L69-L72
Journal	Astrophysical Journal
Volume	561
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/324056
Publication status	Published - Nov 1 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/324056

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title = "BeppoSAX observation of NGC 3079",

abstract = "Using the BeppoSAX observatory, we have observed a nearby LINER/Seyfert 2 galaxy, NGC 3079, which is known as an outflow galaxy and a bright H2O maser source. Using the Phoswich Detection System, we have revealed that the NGC 3079 nucleus suffers from a Compton-thick absorption, with a hydrogen column density ∼1025 cm-2. After corrected the absorption, the 2-10 keV luminosity becomes 1042-1043 ergs s-1 at a distance of 16 Mpc. It is 2-3 orders of magnitude higher than that observed in the Medium Energy Concentrator Spectrometer band (below 10 keV). We also detected a strong Fe K line at 6.4+0.3-0.2 keV with an equivalent width of 2.4+2.9-1.5 keV, which is consistent with the heavy absorption.",

author = "Naoko Iyomoto and Yasushi Fukazawa and Naomasa Nakai and Yuko Ishihara",

year = "2001",

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doi = "10.1086/324056",

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journal = "Astrophysical Journal",

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T1 - BeppoSAX observation of NGC 3079

AU - Iyomoto, Naoko

AU - Fukazawa, Yasushi

AU - Nakai, Naomasa

AU - Ishihara, Yuko

PY - 2001/11/1

Y1 - 2001/11/1

N2 - Using the BeppoSAX observatory, we have observed a nearby LINER/Seyfert 2 galaxy, NGC 3079, which is known as an outflow galaxy and a bright H2O maser source. Using the Phoswich Detection System, we have revealed that the NGC 3079 nucleus suffers from a Compton-thick absorption, with a hydrogen column density ∼1025 cm-2. After corrected the absorption, the 2-10 keV luminosity becomes 1042-1043 ergs s-1 at a distance of 16 Mpc. It is 2-3 orders of magnitude higher than that observed in the Medium Energy Concentrator Spectrometer band (below 10 keV). We also detected a strong Fe K line at 6.4+0.3-0.2 keV with an equivalent width of 2.4+2.9-1.5 keV, which is consistent with the heavy absorption.

AB - Using the BeppoSAX observatory, we have observed a nearby LINER/Seyfert 2 galaxy, NGC 3079, which is known as an outflow galaxy and a bright H2O maser source. Using the Phoswich Detection System, we have revealed that the NGC 3079 nucleus suffers from a Compton-thick absorption, with a hydrogen column density ∼1025 cm-2. After corrected the absorption, the 2-10 keV luminosity becomes 1042-1043 ergs s-1 at a distance of 16 Mpc. It is 2-3 orders of magnitude higher than that observed in the Medium Energy Concentrator Spectrometer band (below 10 keV). We also detected a strong Fe K line at 6.4+0.3-0.2 keV with an equivalent width of 2.4+2.9-1.5 keV, which is consistent with the heavy absorption.

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JF - Astrophysical Journal

IS - 1 PART 2

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BeppoSAX observation of NGC 3079

Abstract

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