A New Compton-thick AGN in Our Cosmic Backyard: Unveiling the Buried Nucleus in NGC 1448 with NuSTAR

  title={A New Compton-thick AGN in Our Cosmic Backyard: Unveiling the Buried Nucleus in NGC 1448 with NuSTAR},
  author={Adlyka Annuar and Dave M. Alexander and Poshak Gandhi and G Lansbury and Daniel Asmus and David R. Ballantyne and Franz Erik Bauer and Steven E. Boggs and Peter G. Boorman and W. N. Brandt and Murray Brightman and F. E. Christensen and William W. Craig and Duncan Farrah and Andy Goulding and Charles James Hailey and Fiona A. Harrison and Michael J. Koss and Stephanie M. LaMassa and Stephen S. Murray and Claudio Ricci and David J. Rosario and Flora Stanley and Daniel Stern and W. W. Zhang},
  journal={The Astrophysical Journal},
NGC 1448 is one of the nearest luminous galaxies (L_(8–1000μm) > 10^9 L⊙) to ours (z = 0.00390), and yet the active galactic nucleus (AGN) it hosts was only recently discovered, in 2009. In this paper, we present an analysis of the nuclear source across three wavebands: mid-infrared (MIR) continuum, optical, and X-rays. We observed the source with the Nuclear Spectroscopic Telescope Array (NuSTAR), and combined these data with archival Chandra data to perform broadband X-ray spectral fitting… Expand

Figures and Tables from this paper

NuSTAR observations of four nearby X-ray faint AGNs: low luminosity or heavy obscuration?
We present NuSTAR (Nuclear Spectroscopic Telescope Array) observations of four active galactic nuclei (AGNs) located within 15 Mpc. These AGNs, namely ESO 121-G6, NGC 660, NGC 3486, and NGC 5195,Expand
Compton-thick AGNs in the NuSTAR Era. II. A Deep NuSTAR and XMM-Newton View of the Candidate Compton-thick AGN in NGC 1358
We present the combined NuSTATR and XMM-Newton 0.6-79 keV spectral analysis of a Seyfert 2 galaxy, NGC 1358, which we selected as a candidate Compton thick (CT-) active galactic nucleus (AGN) on theExpand
The highly obscured Seyfert 2 nucleus in NGC 1448 observed with MUSE
We present the analysis of an optical data cube of the central region of NGC 1448, obtained with the Multi Unit Spectroscopic Explorer (MUSE). Chandra X-ray data indicate that the active galacticExpand
The NuSTAR Serendipitous Survey: Hunting for the Most Extreme Obscured AGN at >10 keV
We identify sources with extremely hard X-ray spectra (i.e., with photon indices of Γ ≾ 0.6) in the 13 deg^2 NuSTAR serendipitous survey, to search for the most highly obscured active galactic nucleiExpand
NuSTAR Uncovers an Extremely Local Compton-thick AGN in NGC 4968
We present the analysis of Chandra and NuSTAR spectra of NGC 4968, a local (D$\sim$44 Mpc) 12$\mu$m-selected Seyfert 2 galaxy, enshrouded within Compton-thick layers of obscuring gas. We find noExpand
A long hard-X-ray look at the dual active galactic nuclei of M51 with NuSTAR
We present a broadband X-ray spectral analysis of the M51 system, including the dual active galactic nuclei (AGN) and several off-nuclear point sources. Using a deep observation by NuSTAR, newExpand
An Iwasawa-Taniguchi effect for Compton-thick active galactic nuclei
We present the first study of an Iwasawa–Taniguchi/‘X-ray Baldwin’ effect for Compton-thick active galactic nuclei (AGN). We report a statistically significant anticorrelation between the rest-frameExpand
BAT AGN Spectroscopic Survey. V. X-Ray Properties of the Swift/BAT 70-month AGN Catalog
Hard X-ray ($\geq 10$ keV) observations of Active Galactic Nuclei (AGN) can shed light on some of the most obscured episodes of accretion onto supermassive black holes. The 70-month Swift/BAT all-skyExpand
Active galactic nuclei: what’s in a name?
Active galactic nuclei (AGN) are energetic astrophysical sources powered by accretion onto supermassive black holes in galaxies, and present unique observational signatures that cover the fullExpand
The Hunt for Intermediate Mass Black Holes in the JWST Era
Intermediate mass black holes (IMBHs), with masses between 100 to 10^5 M_\odot, represent the link between stellar mass black holes and the supermassive black holes that reside in galaxy centers.Expand


NuSTAR Observations of the Compton-thick Active Galactic Nucleus and Ultraluminous X-ray Source Candidate in NGC 5643
We present two NuSTAR observations of the local Seyfert 2 active galactic nucleus (AGN) and an ultraluminous X-ray source (ULX) candidate in NGC 5643. Together with archival data from Chandra,Expand
We present X-ray spectral analyses for three Seyfert 2 active galactic nuclei (AGNs), NGC 424, NGC 1320, and IC 2560, observed by NuSTAR in the 3–79 keV band. The high quality hard X-ray spectraExpand
A Compton thick AGN in the barred spiral galaxy NGC 4785
We present X-ray observations of the active galactic nucleus (AGN) in NGC 4785. The source is a local Seyfert 2 which has not been studied so far in much detail. It was recently detected with highExpand
Searching for Compton-thick active galactic nuclei at z∼ 0.1
Using a suite of X-ray, mid-infrared (mid-IR) and optical active galactic nuclei (AGN) luminosity indicators, we search for Compton-thick AGNs with intrinsic LX > 10 42 erg s −1 at z ∼ 0.03–0.2, aExpand
NuSTAR Unveils a Compton-Thick Type 2 Quasar in MrK 34
We present Nuclear Spectroscopic Telescope Array (NuSTAR) 3-40 keV observations of the optically selected Type 2 quasar (QSO2) SDSS J1034+6001 or Mrk 34. The high-quality hard X-ray spectrum andExpand
The Space Density of Compton-Thick Active Galactic Nucleus and the X-Ray Background
We constrain the number density and evolution of Compton-thick (CT) active galactic nuclei (AGNs). In the local universe, we use the wide-area surveys from the Swift and INTEGRAL satellites, whileExpand
Compton-thick Accretion in the local Universe
Heavily obscured accretion is believed to represent an important stage in the growth of supermassive black holes, and to play an important role in shaping the observed spectrum of the Cosmic X-rayExpand
Suzaku observations of active galactic nuclei detected in the SWIFT BAT survey: Discovery of a "new type" of buried supermassive black holes
We present the Suzaku broadband observations of two AGNs detected by the Swift BAT hard X-ray (>15 keV) survey that did not have previous X-ray data, SWIFT J0601.9-8636 and SWIFT J0138.6-4001. TheExpand
An ASCA Observation of M51 (NGC 5194): Iron K Emission from an Obscured Active Galactic Nucleus
We present an ASCA observation of the nearby spiral galaxy M51 (NGC 5194). We detected hard X-ray emission with a photon index of ~1.4 and a luminosity of LX ~ 1.1 × 1040 ergs s-1 in the 2-10 keVExpand
We present a new metric that uses the spectral curvature (SC) above 10 keV to identify Compton-thick active galactic nuclei (AGNs) in low-quality Swift/Burst Alert Telescope (BAT) X-ray data. UsingExpand