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  Partner: UNT College of Arts and Sciences
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The X-ray Spectral Properties and Variability of Luminous High-Redshift Active Galactic Nuclei

The X-ray Spectral Properties and Variability of Luminous High-Redshift Active Galactic Nuclei

Date: May 20, 2005
Creator: Shemmer, Ohad; Brandt, William Nielsen; Vignali, Christian; Schneider, Donald P.; Fan, Xiaohui; Richards, Gordon T. et al.
Description: This article contains a detailed investigation of moderate- to high-quality X-ray spectra of 10 of the most luminous active galactic nuclei known at z > 4.
Contributing Partner: UNT College of Arts and Sciences
Chandra Observations of the Highest Redshift Quasars from the Sloan Digital Sky Survey

Chandra Observations of the Highest Redshift Quasars from the Sloan Digital Sky Survey

Date: February 17, 2006
Creator: Shemmer, Ohad; Brandt, William Nielsen; Schneider, Donald P.; Fan, Xiaohui; Strauss, Michael A.; Diamond-Stanic, Aleksandar M. et al.
Description: This article presents Chandra observations of 21 z > 4 quasars, including 11 sources at z > 5.
Contributing Partner: UNT College of Arts and Sciences
XMM-Newton spectroscopy of the highly polarized and luminous broad absorption line quasar CSO 755

XMM-Newton spectroscopy of the highly polarized and luminous broad absorption line quasar CSO 755

Date: September 4, 2005
Creator: Shemmer, Ohad; Brandt, William Nielsen; Gallagher, S.C.; Vignali, Christian; Boller, TH.; Chartas, George et al.
Description: This article presents results from the XMM-Newton observations of the highly optically polarized broad absorption line quasar CSO 755.
Contributing Partner: UNT College of Arts and Sciences
The Discovery of a Nearby M Dwarf

The Discovery of a Nearby M Dwarf

Date: April 1999
Creator: Shemmer, Ohad & Kaspi, Shai
Description: This article reports the serendipitous discovery of a nearby M dwarf star, found while observing the old nova DN Gem at the Wise Observatory.
Contributing Partner: UNT College of Arts and Sciences
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
Massive Stars Exploding in a He-Rich Circumstellar Medium -- I. Type Ibn (SN 2006jc-Like) Events

Massive Stars Exploding in a He-Rich Circumstellar Medium -- I. Type Ibn (SN 2006jc-Like) Events

Date: June 15, 2008
Creator: Pastorello, Andrea; Mattila, Seppo; Zampieri, Luca; Della Valle, Massimo; Smartt, Stephen J.; Valenti, Stefano et al.
Description: This article presents new spectroscopic and photometric data of the Type Ibn supernovae 2006jc, 2000er and 2002ao.
Contributing Partner: UNT College of Arts and Sciences
Recent Advances in Photoinduced Electron Transfer Processes of Fullerene-Based Molecular Assemblies and Nanocomposites

Recent Advances in Photoinduced Electron Transfer Processes of Fullerene-Based Molecular Assemblies and Nanocomposites

Date: May 8, 2012
Creator: Ito, Osamu & D'Souza, Francis
Description: This article surveys photosensitized electron-transfer processes of fullerenes hybridized with electron donating or other electron accepting molecules.
Contributing Partner: UNT College of Arts and Sciences
Buckminsterfullerene, C₆₀: Improved Synthesis, Electron Microscopy, Electron States, Anions and Related Aspects

Buckminsterfullerene, C₆₀: Improved Synthesis, Electron Microscopy, Electron States, Anions and Related Aspects

Date: August 19, 1991
Creator: Pradeep, T.; D'Souza, Francis; Subbanna, G.N.; Krishnan, V. & Rao, C.N.R.
Description: This article describes the synthesis and characterization of C₆₀, by means of electron microscopy, electron states, cyclic voltammetry and other techniques.
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
Chloring e6 Sensitized Photovoltaic Cells: Effect of Co-Adsorbents on Cell Performance, Charge Transfer Resistance, and Charge Recombination Dynamics

Chloring e6 Sensitized Photovoltaic Cells: Effect of Co-Adsorbents on Cell Performance, Charge Transfer Resistance, and Charge Recombination Dynamics

Date: June 17, 2015
Creator: Lightbourne, Sherard K.S.; Gobeze, Habtom B.; Subbaiyan, Navaneetha K. & D'Souza, Francis
Description: This article investigates the effect of dye-aggregation-preventing co-adsorbents, cholic acid and deoxycholic acid, on the performance of dye-sensitized solar cells constructed using a metal-free sensitizer, chlorin e6 adsorbed onto TiO₂ surface.
Contributing Partner: UNT College of Arts and Sciences
Singlet Quenching of Tetraphenylporphyrin and its Metal Derivatives by Iron(III) Coordination Compounds

Singlet Quenching of Tetraphenylporphyrin and its Metal Derivatives by Iron(III) Coordination Compounds

Date: January 6, 1990
Creator: D'Souza, Francis & Krishnan, V.
Description: This article reports on the singlet quenching of 5, 10, 15, 20-tetraphenylporphyrin (H₂TPP) and its magnesium(II) and zinc(II) derivatives (MgTPP and ZnTPP) by a series of iron(III) coordination compounds bearing different ligand systems.
Contributing Partner: UNT College of Arts and Sciences
Optically Selected BL Lacertae Candidates from the Sloan Digital Sky Survey Data Release Seven

Optically Selected BL Lacertae Candidates from the Sloan Digital Sky Survey Data Release Seven

Date: October 30, 2009
Creator: Plotkin, Richard M.; Anderson, Scott F.; Brandt, William Nielsen; Diamond-Stanic, Aleksandar M.; Fan, Xiaohui; Hall, Patrick B. et al.
Description: This article presents a sample of 723 optically selected BL Lac candidates from the Sloan Digital Sky Survey Data Release 7 spectroscopic database.
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
Star Formation in the Hosts of High-z QSOs: Evidence from Spitzer PAH Detections

Star Formation in the Hosts of High-z QSOs: Evidence from Spitzer PAH Detections

Date: May 17, 2008
Creator: Lutz, Dieter; Sturm, Eckhard; Tacconi, Linda; Valiante, Elisabetta; Schweitzer, Mario; Netzer, Hagai et al.
Description: This article presents Spitzer rest frame mid-infrared spectroscopy of 12z~2 millimeter-bright type 1 QSOs.
Contributing Partner: UNT College of Arts and Sciences
PAH Emission and Star Formation in the Host of the z ~ 2.56 Cloverleaf QSO

PAH Emission and Star Formation in the Host of the z ~ 2.56 Cloverleaf QSO

Date: March 30, 2007
Creator: Lutz, Dieter; Sturm, Eckhard; Tacconi, Linda; Valiante, Elisabetta; Schweitzer, Mario; Netzer, Hagai et al.
Description: This article reports the first detection of the 6.2 and 7.7 μm infrared polycyclic aromatic hydrocarbon emission features in the spectrum of a high-redshift QSO, from the Spitzer IRS spectrum of the Cloverleaf lensed QSO.
Contributing Partner: UNT College of Arts and Sciences
The X-Ray Properties of the Most Luminous Quasars From the Sloan Digital Sky Survey

The X-Ray Properties of the Most Luminous Quasars From the Sloan Digital Sky Survey

Date: May 18, 2007
Creator: Just, Dennis W.; Brandt, William Nielsen; Shemmer, Ohad; Steffen, Aaron; Schneider, Donald P.; Chartas, George et al.
Description: This article studies the X-ray properties of a representative sample of 59 of the most optically luminous quasars in the universe spanning a redshift range of z ≈ 1.5-4.5.
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