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  Partner: UNT College of Arts and Sciences
 Decade: 2010-2019
 Collection: UNT Scholarly Works
Improved bore-sight calibration for airborne light detection and ranging using planar patches

Improved bore-sight calibration for airborne light detection and ranging using planar patches

Date: May 9, 2016
Creator: Li, Dong; Guo, Huadong; Wang, Cheng; Dong, Pinliang & Zuo, Zhengli
Description: This article proposes an improved method for bore-sight calibration based on the principles of symmetry of coordinate offsets and low correlations between bore-sight angles.
Contributing Partner: UNT College of Arts and Sciences
Light detection and ranging and hyperspectral data for estimation of forest biomass: a review

Light detection and ranging and hyperspectral data for estimation of forest biomass: a review

Date: December 18, 2014
Creator: Man, Qixia; Dong, Pinliang; Guo, Huadong; Liu, Guang & Shi, Runhe
Description: This review addresses the status of hyperspectral data, LiDAR data, and the fusion of these two data sources for forest biomass estimation in the last decade.
Contributing Partner: UNT College of Arts and Sciences
Comparison of different methods for monitoring glacier changes observed by Landsat images

Comparison of different methods for monitoring glacier changes observed by Landsat images

Date: March 18, 2014
Creator: Man, Qixia; Guo, Huadong; Liu, Guang & Dong, Pinliang
Description: This paper presents three methods for classifying glacier boundaries, compares the three methods to provide advice on how to choose an appropriate method, and analyzes the relationship between glacier change and the trends of precipitation and temperature.
Contributing Partner: UNT College of Arts and Sciences
A rich Internet application for automated detection of road blockage in post-disaster scenarios

A rich Internet application for automated detection of road blockage in post-disaster scenarios

Date: February 25, 2014
Creator: Liu, W.; Dong, Pinliang; Liu, S. & Liu, J.
Description: This paper presents the development of a rich Internet application for automated detection of road blockage in post-disaster scenarios using volunteered geographic information from OpenStreetMap street centerlines and airborne light detection and ranging (LiDAR) data.
Contributing Partner: UNT College of Arts and Sciences
Investigation of Structural and Optical Properties of Ag Nanoclusters Formed in Si(100) After Multiple Implantations of Low Energies Ag Ions and Post-Thermal Annealing at a Temperature Below the Ag-Si Eutectic Point

Investigation of Structural and Optical Properties of Ag Nanoclusters Formed in Si(100) After Multiple Implantations of Low Energies Ag Ions and Post-Thermal Annealing at a Temperature Below the Ag-Si Eutectic Point

Date: April 2, 2014
Creator: Dhoubhadel, Mangal; Rout, Bibhudutta; Lakshantha, Wickramaarachchige J.; Das, Sushanta K.; D'Souza, Francis; Glass, Gary A. et al.
Description: This paper investigates the synthesis of Ag NCs in Si(100) substrate by implanting multiple energies and fluences of Ag ions and subsequent thermal annealing.
Contributing Partner: UNT College of Arts and Sciences
A Population of X-Ray Weak Quasars: PHL 1811 Analogs at High Redshift

A Population of X-Ray Weak Quasars: PHL 1811 Analogs at High Redshift

Date: April 15, 2011
Creator: Wu, Jianfeng; Brandt, William Nielsen; Hall, Patrick B.; Gibson, Robert R.; Richards, Gordon T.; Schneider, Donald P. et al.
Description: This article reports the results from Chandra and XMM-Newton observations of a sample of 10 type 1 quasars selected to have unusual UV emission-line properties similar to those of PHL 1811.
Contributing Partner: UNT College of Arts and Sciences
Variability-Selected Low-Luminosity Active Galactic Nuclei in the 4 Ms Chandra Deep Field-South

Variability-Selected Low-Luminosity Active Galactic Nuclei in the 4 Ms Chandra Deep Field-South

Date: January 18, 2012
Creator: Young, Monica; Brandt, William Nielsen; Xue, Yongquan; Alexander, David M.; Bauer, Franz E.; Lehmer, Bret et al.
Description: This article demonstrates that the observed variability cannot be explained by X-ray Binary populations or ultraluminous X-ray sources, so the variability is most likely caused by accretion onto a supermassive black hole.
Contributing Partner: UNT College of Arts and Sciences
On The Performance of Quasar Reverberation Mapping in the Era of Time-Domain Photometric Surveys

On The Performance of Quasar Reverberation Mapping in the Era of Time-Domain Photometric Surveys

Date: February 2, 2014
Creator: Chelouche, Doron; Shemmer, Ohad; Cotlier, Gabriel I.; Barth, Aaron J. & Rafter, Stephen E.
Description: This article quantitatively assesses, by means of comprehensive numerical simulations, the ability of broadband photometric surveys to recover the broad emission line region size in quasars under various observing conditions and for a wide range of object properties.
Contributing Partner: UNT College of Arts and Sciences
X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei

X-Ray Spectral Constraints for z ≈ 2 Massive Galaxies: The Identification of Reflection-Dominated Active Galactic Nuclei

Date: June 6, 2011
Creator: Alexander, David M.; Bauer, Franz E.; Brandt, William Nielsen; Daddi, Emanuele; Hickox, Ryan; Lehmer, Bret et al.
Description: This article uses the 4 Ms Chandra Deep Field-South survey to place direct constraints on the ubiquity of z ≈ 2 heavily obscured active galactic nuclei.
Contributing Partner: UNT College of Arts and Sciences
Locating Star-Forming Regions in Quasar Host Galaxies

Locating Star-Forming Regions in Quasar Host Galaxies

Date: November 5, 2013
Creator: Young, Jason E.; Eracleous, Michael; Shemmer, Ohad; Netzer, Hagai; Gronwall, Caryl; Lutz, Dieter et al.
Description: This article presents a study of the morphology and intensity of star formation in the host galaxies of eight Palomar-Green quasars using observations with the Hubble Space Telescope.
Contributing Partner: UNT College of Arts and Sciences
A Statistical Relation Between the X-ray Spectral Index and Eddington Ratio of Active Galactic Nuclei in Deep Surveys

A Statistical Relation Between the X-ray Spectral Index and Eddington Ratio of Active Galactic Nuclei in Deep Surveys

Date: May 22, 2013
Creator: Brightman, M.; Silverman, John David; Mainieri, Vincenzo; Ueda, Yoshihiro; Schramm, Malte; Matsuoka, Kenta et al.
Description: This article presents an investigation into how well the properties of the accretion flow on to a supermassive black hole may be coupled to those of the overlying hot corona.
Contributing Partner: UNT College of Arts and Sciences
Exploratory X-Ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Initial Results

Exploratory X-Ray Monitoring of Luminous Radio-Quiet Quasars at High Redshift: Initial Results

Date: January 17, 2014
Creator: Shemmer, Ohad; Brandt, William Nielsen; Paolillo, Maurizio; Kaspi, Shai; Vignali, Christian; Stein, Matthew S. et al.
Description: This article presents initial results from an exploratory X-ray monitoring project of two groups of comparably luminous radio-quiet quasars.
Contributing Partner: UNT College of Arts and Sciences
A Comprehensive Analysis of Groundwater Quality in the Barnett Shale Region

A Comprehensive Analysis of Groundwater Quality in the Barnett Shale Region

Date: June 16, 2015
Creator: Hildenbrand, Zacariah Louis; Carlton Jr., Doug D.; Fontenot, Brian; Meik, Jesse M.; Walton, Jayme; Taylor, Josh et al.
Description: This article presents an analysis of 550 groundwater samples collected from private and public supply water wells drawing from aquifers overlying the Barnett shale formation of Texas.
Contributing Partner: UNT College of Arts and Sciences
Weak Line Quasars at High Redshift: Extremely High Accretion Rates or Anemic Broad-Line Regions?

Weak Line Quasars at High Redshift: Extremely High Accretion Rates or Anemic Broad-Line Regions?

Date: September 8, 2010
Creator: Shemmer, Ohad; Trakhtenbrot, Benny; Anderson, Scott F.; Brandt, William Nielsen; Diamond-Stanic, Aleksandar M.; Fan, Xiaohui et al.
Description: This article presents Gemini-North K-band spectra of two representative members of the class of high-redshift quasars with exceptionally weak rest-frame ultraviolet emission lines.
Contributing Partner: UNT College of Arts and Sciences
Star Formation and Black Hole Growth at z ≃4.8

Star Formation and Black Hole Growth at z ≃4.8

Date: May 29, 2014
Creator: Netzer, Hagai; Mor, Rivay; Trakhtenbrot, Benny; Shemmer, Ohad & Lira, Paulina
Description: This article reports Herschel/SPIRE, Spitzer and Wide-field Infrared Survey Explorer obervations of 44 z ≃ 4.8 optically selected active galactic nuclei.
Contributing Partner: UNT College of Arts and Sciences
The Ultraviolet-To-Mid-Infrared Spectral Energy Distribution of Weak Emission Line Quasars

The Ultraviolet-To-Mid-Infrared Spectral Energy Distribution of Weak Emission Line Quasars

Date: September 23, 2011
Creator: Lane, Ryan A.; Shemmer, Ohad; Diamond-Stanic, Aleksandar M.; Fan, Xiaohui; Anderson, Scott F.; Brandt, William Nielsen et al.
Description: This article presents Spitzer Space Telescope photometry of 18 Sloan Digital Sky Survey quasars which have weak or undetectable high-ionization emission lines in their rest-frame ultraviolet spectra.
Contributing Partner: UNT College of Arts and Sciences
X-Ray and Multiwavelength Insights into the Nature of Weak Emission-Line Quasars at Low Redshift

X-Ray and Multiwavelength Insights into the Nature of Weak Emission-Line Quasars at Low Redshift

Date: December 9, 2011
Creator: Wu, Jianfeng; Brandt, William Nielsen; Anderson, Scott F.; Diamond-Stanic, Aleksandar M.; Hall, Patrick B.; Plotkin, Richard M. et al.
Description: This article reports on the X-ray and multiwavelength properties of 11 radio-quiet quasars with weak or no emission lines identified by the Sloan Digital Sky Survey with redshift.
Contributing Partner: UNT College of Arts and Sciences
The X-Ray Properties of the Optically Brightest Mini-Bal Quasars from the Sloan Digital Sky Survey

The X-Ray Properties of the Optically Brightest Mini-Bal Quasars from the Sloan Digital Sky Survey

Date: September 12, 2010
Creator: Wu, Jianfeng; Brandt, William Nielsen; Comins, M.L.; Gibson, Robert R.; Shemmer, Ohad; Garmire, Gordon P. et al.
Description: This article compiles a sample of 14 of the optically brightest radio-quiet quasars in the Sloan Digital Sky Survey Data Release 5 quasar catalog that have mini-broad absorption lines present in their spectra.
Contributing Partner: UNT College of Arts and Sciences
The X-Ray Properties of Typical High-Redshift Radio-Loud Quasars

The X-Ray Properties of Typical High-Redshift Radio-Loud Quasars

Date: June 12, 2011
Creator: Saez, Christian; Brandt, William Nielsen; Shemmer, Ohad; Chomiuk, Laura; Lopez, Laura A.; Marshall, Herman L. et al.
Description: This article reports spectral, imaging, and variability results from four XMM-Newton observations and two Chandra observations of high-redshift radio-loud quasars.
Contributing Partner: UNT College of Arts and Sciences
The 4Ms Chandra Deep Field-South Number Counts Apportioned By Source Class: Pervasive Active Galactic Nuclei and the Ascent of Normal Galaxies

The 4Ms Chandra Deep Field-South Number Counts Apportioned By Source Class: Pervasive Active Galactic Nuclei and the Ascent of Normal Galaxies

Date: April 9, 2012
Creator: Lehmer, Bret; Xue, Yongquan; Brandt, William Nielsen; Alexander, David M.; Bauer, Franz E.; Brusa, Marcella et al.
Description: This article presents cumulative and differential number-count measurements for the recently completed 4 Ms Chandra Deep Field-South survey.
Contributing Partner: UNT College of Arts and Sciences
The Chandra Deep Field-South Survey: 4 Ms Source Catalogs

The Chandra Deep Field-South Survey: 4 Ms Source Catalogs

Date: May 24, 2011
Creator: Xue, Yongquan; Luo, Bin; Brandt, William Nielsen; Bauer, Franz E.; Lehmer, Bret; Broos, Patrick et al.
Description: This article presents source catalogs for the 4 Ms Chandra Deep Field-South.
Contributing Partner: UNT College of Arts and Sciences
Black Hole Mass and Growth Rate at z ≃4.8: A Short Episode of Fast Growth Followed by Short Duty Cycle Activity

Black Hole Mass and Growth Rate at z ≃4.8: A Short Episode of Fast Growth Followed by Short Duty Cycle Activity

Date: December 10, 2010
Creator: Trakhtenbrot, Benny; Netzer, Hagai; Lira, Paulina & Shemmer, Ohad
Description: This article presents H-band spectroscopy for a flux-limited sample of 40 z≃ 4.8 active galactic nuclei, selected from the Sloan Digital Sky Survey.
Contributing Partner: UNT College of Arts and Sciences
Multiwavelength Observations of Radio-Quiet Quasars with Weak Emission Lines

Multiwavelength Observations of Radio-Quiet Quasars with Weak Emission Lines

Date: July 26, 2010
Creator: Plotkin, Richard M.; Anderson, Scott F.; Brandt, William Nielsen; Diamond-Stanic, Aleksandar M.; Fan, Xiaohui; MacLeod, Chelsea L. et al.
Description: This article presents radio and X-ray observations, as well as optical light curves, for a subset of 26 BL Lac candidates from the Sloan Digital Sky Survey lacking strong radio emission and with z < 2.2.
Contributing Partner: UNT College of Arts and Sciences
The Lack of Torus Emission from BL Lacertae Objects: An Infrared View of Unification with WISE

The Lack of Torus Emission from BL Lacertae Objects: An Infrared View of Unification with WISE

Date: December 21, 2011
Creator: Plotkin, Richard M.; Anderson, Scott F.; Brandt, William Nielsen; Markoff, Sera; Shemmer, Ohad & Wu, Jianfeng
Description: This article uses data from the Wide-Field Infrared Survey Explorer to perform a statistical study on the mid-infrared properties of a large number of BL Lac objects.
Contributing Partner: UNT College of Arts and Sciences
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