scholarly journals Radio through X‐Ray Spectral Energy Distributions of 38 Broad Absorption Line Quasars

2007 ◽  
Vol 665 (1) ◽  
pp. 157-173 ◽  
Author(s):  
S. C. Gallagher ◽  
D. C. Hines ◽  
Myra Blaylock ◽  
R. S. Priddey ◽  
W. N. Brandt ◽  
...  
Keyword(s):  
Absorption Line ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Broad Absorption ◽  
X Ray ◽  
Broad Absorption Line

scholarly journals Jet-linked X-ray emission in radio-loud broad absorption line (BAL) quasars

2012 ◽  
Vol 8 (S290) ◽  
pp. 243-244
Author(s):  
M. Kunert-Bajraszewska ◽  
K. Katarzyński ◽  
A. Janiuk ◽  
M. Cegłowski
Keyword(s):  
Absorption Line ◽  
Large Scale ◽  
Large Fraction ◽  
Spectral Energy Distribution ◽  
Compact Objects ◽  
Spectral Energy ◽  
Broad Absorption ◽  
X Ray ◽  
Broad Absorption Line ◽  
Inverse Compton

AbstractWe have applied theoretical models to explain spectral energy distribution (SED) of three radio-loud broad absorption line (BAL) quasars: an extended hybrid object PG 1004+130 and two compact sources 1045+352 and 3C270.1. We calculate the emission from the very inner part of the sources which accounts for more than 90% of the observed X-ray radiation. In our analysis we consider a scenario in which the observed X-ray emission comes from the inverse-Compton (IC) scattering inside a jet and from the accretion disk corona. The compact objects 1045+352 and 3C270.1 are high-redshift quasars (z = 1.604 and 1.532 respectively), with strong radio cores. We argue that in the case of these two sources a non-thermal, inverse-Compton emission from the innermost parts of the jet can explain a large fraction of the observed X-ray emission. The large scale object PG 1004+130 with a peculiar radio morphology is a low-redshift (z = 0.24), lobe-dominated BAL quasar with a weak radio core. In this case simulated inverse-Compton X-ray emission of the jet is relatively low. However, the corona emission appears strong enough to explain the observed X-ray spectrum of this object.

scholarly journals The Far‐Infrared Spectral Energy Distributions of X‐Ray–selected Active Galaxies

2003 ◽  
Vol 590 (1) ◽  
pp. 128-148 ◽  
Author(s):  
Joanna K. Kuraszkiewicz ◽  
Belinda J. Wilkes ◽  
Eric ◽  
J. Hooper ◽  
Kim K. McLeod ◽  
...  
Keyword(s):  
Far Infrared ◽  
Active Galaxies ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
X Ray ◽  
Infrared Spectral

scholarly journals The spectral energy distributions of active galactic nuclei

2019 ◽  
Vol 15 (S341) ◽  
pp. 21-25
Author(s):  
M. J. I. Brown ◽  
K. J. Duncan ◽  
H. Landt ◽  
M. Kirk ◽  
C. Ricci ◽  
...  
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Spectral Energy ◽  
Wide Field ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Photometric Redshifts ◽  
X Ray ◽  
Ongoing Work ◽  
Prior Literature

AbstarctWe present ongoing work on the spectral energy distributions (SEDs) of active galactic nuclei (AGNs), derived from X-ray, ultraviolet, optical, infrared and radio photometry and spectroscopy. Our work is motivated by new wide-field imaging surveys that will identify vast numbers of AGNs, and by the need to benchmark AGN SED fitting codes. We have constructed 41 SEDs of individual AGNs and 80 additional SEDs that mimic Seyfert spectra. All of our SEDs span 0.09 to 30μm, while some extend into the X-ray and/or radio. We have tested the utility of the SEDs by using them to generate AGN photometric redshifts, and they outperform SEDs from the prior literature, including reduced redshift errors and flux density residuals.

scholarly journals The Frequency of Intrinsic X-Ray Weakness among Broad Absorption Line Quasars

2018 ◽  
Vol 859 (2) ◽  
pp. 113 ◽  
Author(s):  
Hezhen Liu ◽  
B. Luo ◽  
W. N. Brandt ◽  
S. C. Gallagher ◽  
G. P. Garmire
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
X Ray ◽  
Broad Absorption Line

scholarly journals Variations of the physical parameters of the blazar Mrk 421 based on analysis of the spectral energy distributions

2020 ◽  
Vol 72 (3) ◽  
Author(s):  
Yurika Yamada ◽  
Makoto Uemura ◽  
Ryosuke Itoh ◽  
Yasushi Fukazawa ◽  
Masanori Ohno ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Optimal Solution ◽  
Spectral Energy ◽  
Physical Parameters ◽  
Zone Model ◽  
Spectral Energy Distributions ◽  
Large Area ◽  
Energy Distributions ◽  
X Ray ◽  
The One

Abstract We report on the variations of the physical parameters of the jet observed in the blazar Mrk 421, and discuss the origin of X-ray flares in the jet, based on analysis of several spectral energy distributions (SEDs). The SEDs are modeled using the one-zone synchrotron self-Compton model, its parameters determined using a Markov chain Monte Carlo method. The lack of data at TeV energies means many of the parameters cannot be uniquely determined and are correlated. These are studied in detail. We find that the optimal solution can be uniquely determined only when we apply a constraint to one of four parameters: the magnetic field (B), the Doppler factor, the size of the emitting region, and the normalization factor of the electron energy distribution. We used 31 sets of SEDs from 2009 to 2014 with optical–UV data observed with UVOT/Swift and the Kanata telescope, X-ray data with XRT/Swift, and γ-ray data with the Fermi Large Area Telescope. The result of our SED analysis suggests that, in the X-ray faint state, the emission occurs in a relatively small area (∼1016 cm) with a relatively strong magnetic field (B ∼ 10−1 G). The X-ray bright state shows a tendency opposite to that of the faint state, that is, a large emitting area (∼1018 cm), probably downstream of the jet, and a weak magnetic field (B ∼ 10−3 G). The high X-ray flux was due to an increase in the maximum energy of electrons. On the other hand, the presence of two kinds of emitting areas implies that the one-zone model is unsuitable for reproducing at least part of the observed SEDs.

scholarly journals On the absorption of X-ray bright broad absorption line quasars

2008 ◽  
Vol 491 (2) ◽  
pp. 425-434 ◽  
Author(s):  
M. Giustini ◽  
M. Cappi ◽  
C. Vignali
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
X Ray ◽  
Broad Absorption Line

scholarly journals NuSTARREVEALS AN INTRINSICALLY X-RAY WEAK BROAD ABSORPTION LINE QUASAR IN THE ULTRALUMINOUS INFRARED GALAXY MARKARIAN 231

2014 ◽  
Vol 785 (1) ◽  
pp. 19 ◽  
Author(s):  
Stacy H. Teng ◽  
W. N. Brandt ◽  
F. A. Harrison ◽  
B. Luo ◽  
D. M. Alexander ◽  
...  
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
X Ray ◽  
Infrared Galaxy ◽  
Broad Absorption Line ◽  
Ultraluminous Infrared Galaxy

scholarly journals Infrared to x-ray spectral energy distributions of high redshift quasars

1994 ◽  
Vol 108 ◽  
pp. 374 ◽  
Author(s):  
Jill Bechtold ◽  
Martin Elvis ◽  
Fabrizio Fiore ◽  
Olga Kuhn ◽  
Roc M. Cutri ◽  
...  
Keyword(s):  
High Redshift ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
X Ray

scholarly journals ACHANDRASURVEY OF THE X-RAY PROPERTIES OF BROAD ABSORPTION LINE RADIO-LOUD QUASARS

2009 ◽  
Vol 702 (2) ◽  
pp. 911-928 ◽  
Author(s):  
B. P. Miller ◽  
W. N. Brandt ◽  
R. R. Gibson ◽  
G. P. Garmire ◽  
O. Shemmer
Keyword(s):  
Absorption Line ◽  
Broad Absorption ◽  
X Ray ◽  
Broad Absorption Line
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