The Mid-Infrared Continua of Seyfert Galaxies (2009)
Deo, Rajesh. P., Richards, Gordon. T., Crenshaw, D. M., Kraemer, S. B.
An analysis of archival mid-infrared (mid-IR) spectra of Seyfert galaxies from the Spitzer Space Telescope observations is presented. We characterize the nature of the mid-IR active nuclear continuum...
Binary Quasars at High Redshift I: 24 New Quasar Pairs at z ~ 3-4 (2009)
Hennawi, Joseph F., Myers, Adam D., Shen, Yue, Strauss, Michael A., Djorgovski, S. G., Fan, Xiaohui, ...
The clustering of quasars on small scales yields fundamental constraints on models of quasar evolution and the buildup of supermassive black holes. This paper describes the first systematic survey to...
The 2dF-SDSS LRG and QSO Survey: the QSO luminosity function at 0.4 (2009)
Croom, Scott M., Richards, Gordon T., Shanks, Tom, Boyle, Brian J., Strauss, Michael A., Myers, Adam D., ...
We present the QSO luminosity function of the completed 2dF-SDSS LRG and QSO (2SLAQ) survey, based on QSOs photometrically selected from Sloan Digital Sky Survey imaging data and then observed...
Jiang, Linhua, Fan, Xiaohui, Bian, Fuyan, Annis, James, Chiu, Kuenley, Jester, Sebastian, ...
We present the discovery of six new quasars at z ~ 6 selected from the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along the...
The Seventh Data Release of the Sloan Digital Sky Survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes...
A Survey of z~6 Quasars in the SDSS Deep Stripe. II. Discovery of Six Quasars at z_{AB}>21 (2009)
Jiang, Linhua, Fan, Xiaohui, Bian, Fuyan, Annis, James, Chiu, Kuenley, Jester, Sebastian, ...
We present the discovery of six new quasars at z~6 selected from the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along the...
Astrometric Redshifts for Quasars (2009)
Kaczmarczik, Michael C., Richards, Gordon T., Mehta, Sajjan S., Schlegel, David J.
The wavelength dependence of atmospheric refraction causes differential chromatic refraction (DCR), whereby objects imaged at different optical/UV wavelengths are observed at slightly different...
High-Redshift SDSS Quasars with Weak Emission Lines (2009)
Diamond-Stanic, Aleksandar M., Fan, Xiaohui, Brandt, W. N., Shemmer, Ohad, Strauss, Michael A., Anderson, Scott F., ...
We identify a sample of 74 high-redshift quasars (z>3) with weak emission lines from the Fifth Data Release of the Sloan Digital Sky Survey and present infrared, optical, and radio observations of a...
Eight-dimensional mid-infrared/optical Bayesian quasar selection (2009)
Richards, Gordon T., Deo, Rajesh P., Lacy, Mark, Myers, Adam D., Nichol, Robert C., Zakamska, Nadia L., ...
We explore the multidimensional, multiwavelength selection of quasars from mid-infrared (MIR) plus optical data, specifically from Spitzer-Infrared Array Camera (IRAC) and the Sloan Digital Sky...
Clustering of Low-Redshift (z (2009)
Ross, Nicholas P., Shen, Yue, Strauss, Michael A., Berk, Daniel E. Vanden, Connolly, Andrew J., Richards, Gordon T., ...
We present measurements of the quasar two-point correlation function, \xi_{Q}, over the redshift range z=0.3-2.2 based upon data from the SDSS. Using a homogeneous sample of 30,239 quasars with...
X-ray Insights into the Nature of Weak Emission-Line Quasars at High Redshift (2009)
Shemmer, Ohad, Brandt, W. N., Anderson, Scott F., Diamond-Stanic, Aleksandar M., Fan, Xiaohui, Richards, Gordon T., ...
We present Chandra observations of nine high-redshift quasars (z=2.7-5.9) discovered by the Sloan Digital Sky Survey with weak or undetectable high-ionization emission lines in their UV spectra...
The seventh data release of the sloan digital sky survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
The 2dF-SDSS LRG and QSO Survey: the spectroscopic QSO catalogue (2009)
Croom, Scott M., Richards, Gordon T., Shanks, Tom, Boyle, Brian J., Sharp, Robert G., Bland-Hawthorn, Joss, ...
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at probing in...
The 2dF-SDSS LRG and QSO Survey: The spectroscopic QSO catalogue (2008)
Croom, Scott M., Richards, Gordon T., Shanks, Tom, Boyle, Brian J., Sharp, Robert G., Bland-Hawthorn, Joss, ...
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG and QSO (2SLAQ) Survey. This is a deep, 18
Quasar Clustering from SDSS DR5: Dependences on Physical Properties (2008)
Shen, Yue, Strauss, Michael A., Ross, Nicholas P., Hall, Patrick B., Lin, Yen-Ting, Richards, Gordon T., ...
Using a homogenous sample of 38,208 quasars with a sky coverage of $4000 {\rm deg^2}$ drawn from the SDSS Data Release Five quasar catalog, we study the dependence of quasar clustering on luminosity,...
Eight-Dimensional Mid-Infrared/Optical Bayesian Quasar Selection (2008)
Richards, Gordon T., Deo, Rajesh P., Lacy, Mark, Myers, Adam D., Nichol, Robert C., Zakamska, Nadia L., ...
We explore the multidimensional, multiwavelength selection of quasars from mid-IR (MIR) plus optical data, specifically from Spitzer-IRAC and the Sloan Digital Sky Survey (SDSS). We apply modern...
Richards, Gordon T., Myers, Adam D., Gray, Alexander G., Riegel, Ryan N., Nichol, Robert C., Brunner, Robert J., ...
We present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data of the Sloan Digital Sky Survey (SDSS). The objects are all point sources to a limiting magnitude of...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Prieto, Carlos Allende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The third image of the large-separation lensed quasar SDSS J1029+26231 (2008)
Oguri, Masamune, Ofek, Eran O., Inada, Naohisa, Morokuma, Tomoki, Falco, Emilio E., Kochanek, Christopher S., ...
We identify a third image in the unique quasar lens SDSS J1029+2623, the second known quasar lens produced by a massive cluster of galaxies. The spectrum of the third image shows similar emission and...
Lee, Induk, Im, Myungshin, Kim, Minjin, Kang, Eugene, Shim, Hyunjin, Richards, Gordon T., ...
We present results from the first phase of the Seoul National University Bright Quasar Survey in Optical (SNUQSO) as well as its basic observational setup. Previous and current large-area surveys...
Heidi Jo Newberg, Gordon T. Richards, Michael Richmond, Xiaohui Fan
We present a catalog containing the measurements of 2262 sources, including 334 extended sources, 1915 point sources, and 13 known QSOs, in ve SDSS passbands. Of these objects, over 1600 are measured...
The 2dF-SDSS LRG and QSO survey: QSO clustering and the L-z degeneracy (2008)
Da Angela, J., Shanks, T., Croom, S. M., Weilbacher, P., Brunner, R. J., Couch, W.J., ...
We combine the QSO samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-SDSS LRG and QSO Survey (2SLAQ) in order to investigate the clustering of z 1.4 QSOs and measure the correlation function...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
The Third Image of the Large-Separation Lensed Quasar SDSS J1029+2623 (2008)
Oguri, Masamune, Ofek, Eran O., Inada, Naohisa, Morokuma, Tomoki, Falco, Emilio E., Kochanek, Christopher S., ...
We identify a third image in the unique quasar lens SDSS J1029+2623, the second known quasar lens produced by a massive cluster of galaxies. The spectrum of the third image shows similar emission and...
Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications (2008)
Giannantonio, Tommaso, Scranton, Ryan, Crittenden, Robert G., Nichol, Robert C., Boughn, Stephen P., Myers, Adam D., ...
We present a global measurement of the integrated Sachs-Wolfe (ISW) effect obtained by cross-correlating all relevant large scale galaxy data sets with the cosmic microwave background radiation map...
The 2dF-SDSS LRG and QSO survey : QSO clustering and the L-z degeneracy (2008)
Da Angela, Jose A., Shanks, Tom, Croom, Scott M., Weilbacher, Peter M., Brunner, Robert J., Couch, Warrick J., ...
We combine the quasi-stellar object (QSO) samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-Sloan Digital Sky Survey luminous red galaxy (LRG) and QSO Survey (2dF-SDSS LRG and QSO, hereafter...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The 2dF-SDSS LRG and QSO survey : QSO clustering and the L-z degeneracy (2008)
Da Angela, Jose A., Shanks, Tom, Croom, Scott M., Weilbacher, Peter M., Brunner, Robert J., Couch, Warrick J., ...
We combine the quasi-stellar object (QSO) samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-Sloan Digital Sky Survey luminous red galaxy (LRG) and QSO Survey (2dF-SDSS LRG and QSO, hereafter...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the sloan digital sky survey (2008)
Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...
The 2dF-SDSS LRG and QSO survey : QSO clustering and the L-z degeneracy (2008)
Da Angela, Jose A., Shanks, Tom, Croom, Scott M., Weilbacher, Peter M., Brunner, Robert J., Couch, Warrick J., ...
We combine the quasi-stellar object (QSO) samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-Sloan Digital Sky Survey luminous red galaxy (LRG) and QSO Survey (2dF-SDSS LRG and QSO, hereafter...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The 2dF-SDSS LRG and QSO survey : QSO clustering and the L-z degeneracy (2008)
Da Angela, Jose A., Shanks, Tom, Croom, Scott M., Weilbacher, Peter M., Brunner, Robert J., Couch, Warrick J., ...
We combine the quasi-stellar object (QSO) samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-Sloan Digital Sky Survey luminous red galaxy (LRG) and QSO Survey (2dF-SDSS LRG and QSO, hereafter...
The 2dF-SDSS LRG and QSO Survey: the spectroscopic QSO catalogue (2008)
Croom, Scott M., Richards, Gordon T., Shanks, Tom, Boyle, Brian J., Sharp, Robert G., Bland-Hawthorn, Joss, ...
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Jiang, Linhua, Fan, Xiaohui, Annis, James, Becker, Robert H., White, Richard L., Chiu, Kuenley, ...
We present the discovery of five quasars at z ~ 6 selected from 260 deg2 of the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The 2dF-SDSS LRG and QSO survey : QSO clustering and the L-z degeneracy (2008)
Da Angela, Jose A., Shanks, Tom, Croom, Scott M., Weilbacher, Peter M., Brunner, Robert J., Couch, Warrick J., ...
We combine the quasi-stellar object (QSO) samples from the 2dF QSO Redshift Survey (2QZ) and the 2dF-Sloan Digital Sky Survey luminous red galaxy (LRG) and QSO Survey (2dF-SDSS LRG and QSO, hereafter...
The 2dF-SDSS LRG and QSO Survey: the spectroscopic QSO catalogue (2008)
Croom, Scott M., Richards, Gordon T., Shanks, Tom, Boyle, Brian J., Sharp, Robert G., Bland-Hawthorn, Joss, ...
We present the final spectroscopic QSO catalogue from the 2dF-SDSS LRG (luminous red galaxy) and QSO (2SLAQ) survey. This is a deep, 18 < g < 21.85 (extinction corrected), sample aimed at...
Vestergaard, M., Fan, X., Tremonti, C. A., Osmer, Patrick S., Richards, Gordon T.
We present the mass functions of actively accreting supermassive black holes over the redshift range 0.3
Robert H. Becker, Richard L. White, Michael S. Brotherton, Chris D. Impey, Frederic H. Chaffee, ...
We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes...
A new quadruply lensed quasar: SDSS J125107.57+293540.5 (2007)
Kayo, Issha, Inada, Naohisa, Oguri, Masamune, Hall, Patrick B., Kochanek, Christopher S., Richards, Gordon T., ...
We report the discovery of a quadruply imaged quasar, SDSS J125107.57+293540.5, selected from the Sloan Digital Sky Survey. Follow-up imaging reveals that the system consists of four blue pointlike...
Quasar Clustering at $25\kpch$ from a Complete Sample of Binaries (2007)
Myers, Adam D., Richards, Gordon T., Brunner, Robert J., Schneider, Donald P., Strand, Natalie E., Hall, Patrick B., ...
We present spectroscopy of binary quasar candidates selected from Data Release 4 of the Sloan Digital Sky Survey (SDSS DR4) using Kernel Density Estimation (KDE). We present 27 new sets of...
Biases in Virial Black Hole Masses: An SDSS Perspective (2007)
Shen, Yue, Greene, Jenny E., Strauss, Michael A., Richards, Gordon T., Schneider, Donald P.
We compile black hole (BH) masses for $\sim 60,000$ quasars in the redshift range $0.1 \lesssim z \lesssim 4.5$ included in the Fifth Data Release of the Sloan Digital Sky Survey (SDSS), using virial...
A Survey of z~6 Quasars in the SDSS Deep Stripe: I. a Flux-Limited Sample at z_{AB} (2007)
Jiang, Linhua, Fan, Xiaohui, Annis, James, Becker, Robert H., White, Richard L., Chiu, Kuenley, ...
We present the discovery of five quasars at z~6 selected from 260 deg^2 of the Sloan Digital Sky Survey (SDSS) southern survey, a deep imaging survey obtained by repeatedly scanning a stripe along...
Oguri, Masamune, Inada, Naohisa, Strauss, Michael A., Kochanek, Christopher S., Richards, Gordon T., Schneider, Donald P., ...
We present cosmological results from the statistics of lensed quasars in the Sloan Digital Sky Survey (SDSS) Quasar Lens Search. By taking proper account of the selection function, we compute the...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., Shin, Min-Su, Richards, Gordon T., Hennawi, Joseph F., ...
We report the first results of our systematic search for strongly lensed quasars using the spectroscopically confirmed quasars in the Sloan Digital Sky Survey (SDSS). Among 46,420 quasars from the...
A New Quadruply Lensed Quasar: SDSSJ125107.57+293540.5 (2007)
Kayo, Issha, Inada, Naohisa, Oguri, Masamune, Hall, Patrick B., Kochanek, Christopher S., Richards, Gordon T., ...
We report the discovery of a quadruply imaged quasar, SDSSJ125107.57+293540.5, selected from the Sloan Digital Sky Survey. Follow-up imaging reveals that the system consists of four blue point-like...
Clustering of high-redshift (z >= 2.9) quasars from the sloan digital sky survey (2007)
Shen, Yue, Strauss, Michael A., Oguri, Masamune, Hennawi, Joseph F., Fan, Xiaohui, Richards, Gordon T., ...
We study the two-point correlation function of a uniformly selected sample of 4426 luminous optical quasars with redshift 2:9 z 5:4 selected over 4041 deg2 from the Fifth Data Release of the Sloan...
The Sloan Digital Sky Survey Quasar Catalog IV. Fifth Data Release (2007)
Schneider, Donald P., Hall, Patrick B., Richards, Gordon T., Strauss, Michael A., Berk, Daniel E. Vanden, Anderson, Scott F., ...
We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The...
Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey (2007)
Shen, Yue, Strauss, Michael A., Oguri, Masamune, Hennawi, Joseph F., Fan, Xiaohui, Richards, Gordon T., ...
(Abridged) We study the two-point correlation function of a uniformly selected sample of 4,426 luminous optical quasars with redshift $2.9 \le z\le 5.4$ selected over 4041 deg$^2$ from the Fifth Data...
Morokuma, Tomoki, Inada, Naohisa, Oguri, Masamune, Ichikawa, Shin-Ichi, Kawano, Yozo, Tokita, Kouichi, ...
We report the discovery of the two-image gravitationally lensed quasar SDSS J133222.62+034739.9 (SDSS J1332+ 0347) with an image separation of ¼1:1400. This system consists of a source quasar at zs...
Two new gravitationally lensed double quasars from the Sloan Digital Sky Survey (2007)
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Kayo, Issha, Kochanek, Christopher S., ...
We report the discoveries of the two-image gravitationally lensed quasars SDSS J074653.03+440351.3 and SDSS J140624.82+612640.9, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403,...
Anderson, Scott F., Margon, Bruce, Voges, Wolfgang, Plotkin, Richard M., Syphers, David, Haggard, Daryl, ...
The fifth data release of the sloan digital sky survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The Sloan Digital Sky Survey Quasar Catalog. IV. Fifth Data Release (2007)
Schneider, Donald P., Hall, Patrick B., Richards, Gordon T., Strauss, Michael A., Vanden Berk, Daniel E., Anderson, Scott F., ...
We present the fourth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog contains 77,429 objects; this is an increase of over 30,000 entries since the previous edition. The...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
Chiu, Kuenley, Richards, Gordon T., Hewett, Paul C., Maddox, Natasha
The UKIRT Infrared Deep Sky Survey (UKIDSS) is the first of a new generation of hemispheric imaging projects to extend the work of the Two Micron All Sky Survey (2MASS) by reaching three magnitudes...
SDSS J1029_2623: a gravitationally lensed quasar with an image separation of 22.5 inches (2006)
Inada, Naohisa, Oguri, Masamune, Morokuma, Tomoki, Doi, Mamoru, Yasuda, Naoki, Becker, Robert H., ...
We report the discovery of a cluster-scale lensed quasar, SDSS J1029+2623, selected from the Sloan Digital Sky Survey. The lens system exhibits two lensed images of a quasar at z p 2.197. The image...
Myers, Adam D., Brunner, Robert J., Nichol, Robert C., Richards, Gordon T., Schneider, Donald P., Bahcall, Neta A.
Using ~300,000 photometrically classified quasars, by far the largest quasar sample ever used for such analyses, we study the redshift and luminosity evolution of quasar clustering on scales of ~50...
Myers, Adam D., Brunner, Robert J., Richards, Gordon T., Nichol, Robert C., Schneider, Donald P., Bahcall, Neta A.
We study quasar clustering on small scales, modeling clustering amplitudes using halo-driven dark matter descriptions. From 91 pairs on scales 2, than at z < 2, at the $2.0\sigma$ level. However, as...
The UV Properties of SDSS Selected Quasars (2006)
Trammell, George B., Berk, Daniel E. Vanden, Schneider, Donald P., Richards, Gordon T., Hall, Patrick B., Anderson, Scott F., ...
We present an analysis of the broadband UV/optical properties of z
The Radio-Loud Fraction of Quasars is a Strong Function of Redshift and Optical Luminosity (2006)
Jiang, Linhua, Fan, Xiaohui, Ivezic, Zeljko, Richards, Gordon T., Schneider, Donald P., Strauss, Michael A., ...
Using a sample of optically-selected quasars from the Sloan Digital Sky Survey, we have determined the radio-loud fraction (RLF) of quasars as a function of redshift and optical luminosity. The...
SDSS J1029+2623: A Gravitationally Lensed Quasar with an Image Separation of 22.5 Arcseconds (2006)
Inada, Naohisa, Oguri, Masamune, Morokuma, Tomoki, Doi, Mamoru, Yasuda, Naoki, Becker, Robert H., ...
We report the discovery of a cluster-scale lensed quasar, SDSS J1029+2623, selected from the Sloan Digital Sky Survey. The lens system exhibits two lensed images of a quasar at z_s=2.197. The image...
Morokuma, Tomoki, Inada, Naohisa, Oguri, Masamune, Ichikawa, Shin-Ichi, Kawano, Yozo, Tokita, Kouichi, ...
We report the discovery of the two-image gravitationally lensed quasar SDSS J133222.62+034739.9 (SDSS J1332+0347) with an image separation of Delta_theta=1.14". This system consists of a source...
Two New Gravitationally Lensed Double Quasars from the Sloan Digital Sky Survey (2006)
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Kayo, Issha, Kochanek, Christopher S., ...
We report the discoveries of the two-image gravitationally lensed quasars, SDSS J0746+4403 and SDSS J1406+6126, selected from the Sloan Digital Sky Survey (SDSS). SDSS J0746+4403, which will be...
Anderson, Scott F., Margon, Bruce, Voges, Wolfgang, Plotkin, Richard M., Syphers, David, Haggard, Daryl, ...
We describe further results of a program aimed to yield ~10^4 fully characterized optical identifications of ROSAT X-ray sources. Our program employs X-ray data from the ROSAT All-Sky Survey (RASS),...
Probing the Evolution of IR Properties of z~6 Quasars: Spitzer Observations (2006)
Jiang, Linhua, Fan, Xiaohui, Hines, Dean C., Shi, Yong, Vestergaard, Marianne, Bertoldi, Frank, ...
We present Spitzer observations of thirteen z~6 quasars using the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS). All the quasars except SDSS J000552.34-000655.8...
A high redshift detection of the integrated Sachs-Wolfe effect (2006)
Giannantonio, Tommaso, Crittenden, Robert G., Nichol, Robert C., Scranton, Ryan, Richards, Gordon T., Myers, Adam D., ...
We present evidence of a large angle correlation between the cosmic microwave background measured by WMAP and a catalog of photometrically detected quasars from the SDSS. The observed cross...
QSO Absorption Lines from QSOs (2006)
Bowen, David V., Hennawi, Joseph F., Menard, Brice, Chelouche, Doron, Inada, Naohisa, Oguri, Masamune, ...
We present the results of a search for metal absorption lines in the spectra of background QSOs whose sightlines pass close to foreground QSOs. We detect MgII(2796,2803) absorption in Sloan Digital...
An Observational Determination of the Bolometric Quasar Luminosity Function (2006)
Hopkins, Philip F., Richards, Gordon T., Hernquist, Lars
We combine a large set of quasar luminosity function (QLF) measurements from the rest-frame optical, soft and hard X-ray, and near- and mid-infrared bands to determine the bolometric QLF in the...
The Sloan Digital Sky Survey Quasar Lens Search. I. Candidate Selection Algorithm (2006)
Oguri, Masamune, Inada, Naohisa, Pindor, Bartosz, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., ...
We present an algorithm for selecting an uniform sample of gravitationally lensed quasar candidates from low-redshift (0.6
AGN Outflows in Emission and Absorption: The SDSS Perspective (2006)
A variety of investigations have demonstrated commonalities between the Baldwin (1977) Effect, the blueshifting of CIV emission lines (e.g., Gaskell 1982; Richards et al. 2002), and the L_UV-L_X...
Quasars Probing Quasars I: Optically Thick Absorbers Near Luminous Quasars (2006)
Hennawi, Joseph F., Prochaska, Jason X., Burles, Scott, Strauss, Michael A., Richards, Gordon T., Schlegel, David J., ...
With close pairs of quasars at different redshifts, a background quasar sightline can be used to study a foreground quasar's environment in absorption. We search 149 moderate resolution background...
Trump, Jonathan R., Hall, Patrick B., Reichard, Timothy A., Richards, Gordon T., Schneider, Donald P., Berk, Daniel E. Vanden, ...
We present a total of 4784 unique broad absorption line quasars from the Sloan Digital Sky Survey Third Data Release. An automated algorithm was used to match a continuum to each quasar and to...
Chandra Observations of the Highest Redshift Quasars from the Sloan Digital Sky Survey (2006)
Shemmer, Ohad, Brandt, W. N., Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Diamond-Stanic, Aleksandar M., ...
We present new Chandra observations of 21 z>4 quasars, including 11 sources at z>5. These observations double the number of X-ray detected quasars at z>5, allowing investigation of the X-ray spectral...
Spectral Energy Distributions and Multiwavelength Selection of Type 1 Quasars (2006)
Richards, Gordon T., Lacy, Mark, Storrie-Lombardi, Lisa J., Hall, Patrick B., Gallagher, S. C., Hines, Dean C., ...
We present an analysis of the mid-infrared (MIR) and optical properties of type 1 (broad-line) quasars detected by the Spitzer Space Telescope. The MIR color-redshift relation is characterized to...
The SDSS Quasar Survey: Quasar Luminosity Function from Data Release Three (2006)
Richards, Gordon T., Strauss, Michael A., Fan, Xiaohui, Hall, Patrick B., Jester, Sebastian, Schneider, Donald P., ...
We determine the number counts and z=0-5 luminosity function for a well-defined, homogeneous sample of quasars from the Sloan Digital Sky Survey (SDSS). We conservatively define the most uniform...
Average Extinction Curves and Relative Abundances for QSO Absorption Line Systems at 1 (2006)
York, Donald G., Khare, Pushpa, Berk, Daniel Vanden, Kulkarni, Varsha P., Crotts, Arlin P. S., Lauroesch, James T., ...
We have studied a sample of 809 Mg II absorption systems with 1.0 < z_abs < 1.86 in the spectra of SDSS QSOs, with the aim of understanding the nature and abundance of the dust and the chemical...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezić, Zeljko, Munn, Jeffrey A., Schlegel, David J., ...
The Sloan Digital Sky Survey quasar survey: Quasar luminosity function from data release 3 (2006)
Richards, Gordon T., Strauss, Michael A., Fan, Xiaohui, Hall, Patrick B., Jester, Sebastian, Schneider, Donald P., ...
We determine the number counts and z=0-5 luminosity function for a well-defined, homogeneous sample of quasars from the Sloan Digital Sky Survey (SDSS). We conservatively define the most uniform...
Spectral energy distributions and multiwavelength selection of type 1 quasars (2006)
Richards, Gordon T., Lacy, Mark, Storrie-Lombardi, Lisa J., Hall, Patrick B., Gallagher, S. C., Hines, Dean C., ...
We present an analysis of the mid-infrared (MIR) and optical properties of type 1 (broad-line) quasars detected by the Spitzer Space Telescope. The MIR color-redshift relation is characterized to...
Probing the evolution of infrared properties of z ~ 6 quasars: Spitzer observations (2006)
Jiang, Linhua, Fan, Xiaohui, Hines, Dean C., Shi, Yong, Vestergaard, Marianne, Bertoldi, Frank, ...
We present Spitzer observations of 13 z~6 quasars using the Infrared Array Camera (IRAC) and Multiband Imaging Photometer for Spitzer (MIPS). All the quasars except SDSS J000552.34-000655.8 (SDSS...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
Inada, Naohisa, Oguri, Masamune, Becker, Robert H., White, Richard L., Gregg, Michael D., Schechter, Paul L., ...
We report the discoveries of two, two-image gravitationally lensed quasars selected from the Sloan Digital Sky Survey: SDSS J0806+2006 at z_s=1.540 and SDSS J1353+1138 at z_s=1.629 with image...
Fan, Xiaohui, Strauss, Michael A., Richards, Gordon T., Hennawi, Joseph F., Becker, Robert H., White, Richard L., ...
We present the discovery of seven quasars at z>5.7, selected from ~2000 deg^2 of multicolor imaging data of the Sloan Digital Sky Survey (SDSS). The new quasars have redshifts z from 5.79 to 6.13....
Fan, Xiaohui, Strauss, Michael A., Becker, Robert H., White, Richard L., Gunn, James E., Knapp, Gillian R., ...
We study the evolution of the ionization state of the IGM at the end of the reionization epoch using spectra of a sample of nineteen quasars at 5.7411}, and the average length of dark gaps with...
First Measurement of the Clustering Evolution of Photometrically-Classified Quasars (2005)
Myers, Adam D., Brunner, Robert J., Richards, Gordon T., Nichol, Robert C., Schneider, Donald P., Berk, Daniel E. Vanden, ...
We present new measurements of the quasar autocorrelation from a sample of \~80,000 photometrically-classified quasars taken from SDSS DR1. We find a best-fit model of $\omega(\theta) =...
SDSSJ102111.02+491330.4: A Newly Discovered Gravitationally Lensed Quasar (2005)
Pindor, Bart, Eisenstein, Daniel J., Gregg, Michael D., Becker, Robert H., Inada, Naohisa, Oguri, Masamune, ...
We report follow-up observations of two gravitational lens candidates identified in the Sloan Digital Sky Survey (SDSS) dataset. We have confirmed that SDSS J102111.02+491330.4 is a previously...
A Snapshot Survey for Gravitational Lenses Among z>=4.0 Quasars: II. Constraints on the 4.0 (2005)
Richards, Gordon T., Haiman, Zoltan, Pindor, Bartosz, Strauss, Michael A., Fan, Xiaohui, Eisenstein, Daniel, ...
We report on i-band snapshot observations of 157 Sloan Digital Sky Survey (SDSS) quasars at 4-4.63 obtained from the absence of lensing in four z>5.7 quasars. Such constraints are important for our...
SDSS J0246-0825: A New Gravitationally Lensed Quasar from the Sloan Digital Sky Survey (2005)
Inada, Naohisa, Burles, Scott, Gregg, Michael D., Becker, Robert H., Schechter, Paul L., Eisenstein, Daniel J., ...
We report the discovery of a new two-image gravitationally lensed quasar, SDSS J024634.11-082536.2 (SDSS J0246-0825). This object was selected as a lensed quasar candidate from the Sloan Digital Sky...
The SDSS View of the Palomar-Green Bright Quasar Survey (2005)
Jester, Sebastian, Schneider, Donald P., Richards, Gordon T., Green, Richard F., Schmidt, Maarten, Hall, Patrick B., ...
We investigate the extent to which the Palomar-Green (PG) Bright Quasar Survey (BQS) is complete and representative of the general quasar population by comparing with imaging and spectroscopy from...
The UV, Optical, and IR Properties of SDSS Sources Detected by GALEX (2005)
Agueros, Marcel A., Ivezic, Zeljko, Covey, Kevin R., Obric, Mirela, Hao, Lei, Walkowicz, Lucianne M., ...
We discuss the UV, optical, and IR properties of the SDSS sources detected by GALEX as part of its All-sky Imaging Survey Early Release Observations. Virtually all of the GALEX sources in the overlap...
Hennawi, Joseph F., Strauss, Michael A., Oguri, Masamune, Inada, Naohisa, Richards, Gordon T., Pindor, Bartosz, ...
We present a sample of 218 new quasar pairs with proper transverse separations R_prop < 1 Mpc/h over the redshift range 0.5 < z < 3.0, discovered from an extensive follow up campaign to find...
Detection of Cosmic Magnification with the Sloan Digital Sky Survey (2005)
Scranton, Ryan, Menard, Brice, Richards, Gordon T., Nichol, Robert C., Myers, Adam D., Jain, Bhuvnesh, ...
We present an 8 sigma detection of cosmic magnification measured by the variation of quasar density due to gravitational lensing by foreground large scale structure. To make this measurement we used...
Spectral Variability of Quasars in the Sloan Digital Sky Survey. I: Wavelength Dependence (2005)
Wilhite, Brian C., Berk, Daniel E. Vanden, Kron, Richard G., Schneider, Donald P., Pereyra, Nicholas, Brunner, Robert J., ...
Sloan Digital Sky Survey (SDSS) repeat spectroscopic observations have resulted in multiple-epoch spectroscopy for roughly 2500 quasars observed more than 50 days apart. From this sample, we identify...
Inada, Naohisa, Oguri, Masamune, Keeton, Charles R., Eisenstein, Daniel J., Castander, Francisco J., Chiu, Kuenley, ...
We report the discovery of a fifth image in the large separation lensed quasar system SDSS J1004+4112. A faint point source located 0.2'' from the center of the brightest galaxy in the lensing...
An Empirical Calibration of the Completeness of the SDSS Quasar Survey (2005)
Berk, Daniel E. Vanden, Schneider, Donald P., Richards, Gordon T., Hall, Patrick B., Strauss, Michael A., Brunner, Robert, ...
Spectra of nearly 20000 point-like objects to a Galactic reddening corrected magnitude of i=19.1 have been obtained to test the completeness of the SDSS quasar survey. The spatially-unresolved...
Active Galactic Nuclei in the Sloan Digital Sky Survey: II. Emission-Line Luminosity Function (2005)
Hao, Lei, Strauss, Michael A., Fan, Xiaohui, Tremonti, Christy A., Schlegel, David J., Heckman, Timothy M., ...
The emission line luminosity function of active galactic nuclei (AGN) is measured from about 3000 AGN included in the main galaxy sample of the Sloan Digital Sky Survey within a redshift range of $0
Active Galactic Nuclei in the Sloan Digital Sky Survey: I. Sample Selection (2005)
Hao, Lei, Strauss, Michael A., Tremonti, Christy A., Schlegel, David J., Heckman, Timothy M., Kauffmann, Guinevere, ...
We have compiled a large sample of low-redshift active galactic nuclei (AGN) identified via their emission line characteristics from the spectroscopic data of the Sloan Digital Sky Survey. Since...
Zakamska, Nadia L., Schmidt, Gary D., Smith, Paul S., Strauss, Michael A., Krolik, Julian H., Hall, Patrick B., ...
The third data release of the sloan digital sky survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Third Data Release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Active galactic nuclei in the sloan digital sky survey. I. Sample selection (2005)
Hao, Lei, Strauss, Michael A., Tremonti, Christy A., Schlegel, David J., Heckman, Timothy M., Kauffmann, Guinevere, ...
Active galactic nuclei in the sloan digital sky survey. II. Emission-line luminosity function (2005)
Hao, Lei, Strauss, Michael A., Fan, Xiaohui, Tremonti, Christy A., Schlegel, David J., Heckman, Timothy M., ...
Optically identified BL lacertae objects from the sloan digital sky survey (2005)
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezić, Zeljko, Munn, Jeffrey A., Schlegel, David J., ...
The sloan digital sky survey quasar catalog - III. Third data release (2005)
Schneider, Donald P., Hall, Patrick B., Richards, Gordon T., Vanden Berk, Daniel E., Anderson, Scott F., Fan, Xiaohui, ...
Active Galactic Nuclei in the Sloan Digital Sky Survey. I. Sample Selection (2005)
Hao, Lei, Strauss, Michael A., Tremonti, Christy A., Schlegel, David J., Heckman, Timothy M., Kauffmann, Guinevere, ...
Strateva, Iskra V., Strauss, Michael A., Hao, Lei, Schlegel, David J., Hall, Pat B., Gunn, James E., ...
The Third Data Release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg2,...
Oguri, Masamune, Inada, Naohisa, Hennawi, Joseph F., Richards, Gordon T., Johnston, David E., Frieman, Joshua A., ...
We report the discovery of two doubly imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789, and with image separations of 2.86" and 2.90",...
Inada, Naohisa, Oguri, Masamune, Keeton, Charles R., Eisenstein, Daniel J., Castander, Francisco J., Chiu, Kuenley, ...
We report on the discovery of a fifth lensed image in the large separation lensed quasar system SDSS J1004 + 4112. A faint point source located 0.''2 from the center of the brightest galaxy in the...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
Optically identified BL Lacertae objects from the Sloan Digital Sky Survey (2004)
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezic, Zeljko, Munn, Jeffrey A., Schlegel, David J., ...
We present a sample of 386 BL Lacertae (BL Lac) candidates identified from 2860 deg^2 of the Sloan Digital Sky Survey (SDSS) spectroscopic database. The candidates are primarily selected to have...
Oguri, Masamune, Inada, Naohisa, Hennawi, Joseph F., Richards, Gordon T., Johnston, David E., Frieman, Joshua A., ...
We report the discovery of two doubly-imaged quasars, SDSS J100128.61+502756.9 and SDSS J120629.65+433217.6, at redshifts of 1.838 and 1.789 and with image separations of 2.86'' and 2.90'',...
Weinstein, Michael A., Richards, Gordon T., Schneider, Donald P., Younger, Joshua D., Strauss, Michael A., Hall, Patrick B., ...
We present an empirical algorithm for obtaining photometric redshifts of quasars using 5-band Sloan Digital Sky Survey (SDSS) photometry. Our algorithm generates an empirical model of the quasar...
Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: 100,000 z (2004)
Richards, Gordon T., Nichol, Robert C., Gray, Alexander G., Brunner, Robert J., Lupton, Robert H., Berk, Daniel E. Vanden, ...
We present a catalog of 100,563 unresolved, UV-excess (UVX) quasar candidates to g=21 from 2099 deg^2 of the Sloan Digital Sky Survey (SDSS) Data Release One (DR1) imaging data. Existing spectra of...
Dust Reddening in SDSS Quasars (2004)
Hopkins, Philip F., Strauss, Michael A., Hall, Patrick B., Richards, Gordon T., Cooper, Ariana S., Schneider, Donald P., ...
We explore the form of extragalactic reddening toward quasars using a sample of 9566 quasars with redshifts 0 0.2, where the extinction is relative to quasars with modal colors. Reddening is...
Conference Summary: AGN Physics with the Sloan Digital Sky Survey (2004)
Hall, Patrick B., Richards, Gordon T.
The ``AGN Physics with the Sloan Digital Sky Survey'' conference was held at Princeton University in July 2003 to bring together groups working inside and outside of the SDSS collaboration at radio...
Fan, Xiaohui, Hennawi, Joseph F., Richards, Gordon T., Strauss, Michael A., Schneider, Donald P., Donley, Jennifer L., ...
We present the discovery of five new quasars at z>5.7, selected from the multicolor imaging data of the Sloan Digital Sky Survey (SDSS). Three of them, at redshifts 5.93, 6.07, and 6.22, were...
Microlensing of the Broad Emission Line Region in the Quadruple Lens SDSS J1004+4112 (2004)
Richards, Gordon T., Keeton, Charles R., Pindor, Bartosz, Hennawi, Joseph F., Hall, Patrick B., Turner, Edwin L., ...
We present seven epochs of spectroscopy on the quadruply imaged quasar SDSS J1004+4112, spanning observed-frame time delays from 1 to 322 days. The spectra reveal differences in the emission lines...
Fan, Xiaohui, Hennawi, Joseph F., Richards, Gordon T., Strauss, Michael A., Schneider, Donald P., Donley, Jennifer L., ...
Optically identified BL Lacs from SDSS (2004)
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezić, Zeljiko, Zakamska, Nadia L., Richards, Gordon T., ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Dust reddening in Sloan Digital Sky Survey quasars (2004)
Hopkins, Philip F., Strauss, Michael A., Hall, Patrick B., Richards, Gordon T., Cooper, Ariana S., Schneider, Donald P., ...
Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Oguri, Masamune, Inada, Naohisa, Keeton, Charles R., Pindor, Bartosz, Hennawi, Joseph F., Gregg, Michael D., ...
We study the recently discovered gravitational lens SDSS J1004+4112, the first quasar lensed by a cluster of galaxies. It consists of four images with a maximum separation of 14.62". The system was...
Finkbeiner, Douglas P., Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...
The Sloan Digital Sky Survey (SDSS) mosaic camera and telescope have obtained five-band optical-wavelength imaging near the Galactic plane outside of the nominal survey boundaries. These additional...
The second data release of the Sloan Digital Sky Survey (2004)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...
The second data release of the Sloan Digital Sky Survey (2004)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...
SDSS J115517.35+634622.0: A Newly Discovered Gravitationally Lensed Quasar (2003)
Pindor, Bart, Eisenstein, Daniel J., Inada, Naohisa, Gregg, Michael D., Becker, Robert H., Brinkmann, Jon, ...
We report the discovery of SDSSJ115517.35+634622.0, a previously unknown gravitationally lensed quasar. The lens system exhibits two images of a $z = 2.89$ quasar, with an image separation of...
Constraints on Quasar Continuum, BELR, and BALR Physics from SDSS Composite Spectra (2003)
Richards, Gordon T., Hall, Patrick B., Reichard, Timothy A., Berk, Daniel E. Vanden, Schneider, Donald P., Strauss, Michael A.
We review recent results on quasars from the SDSS as they relate to our understanding of the UV/optical continuum, the broad emission line region, and the broad absorption line region. The ensemble...
SDSS J1335+0118: A New Two-Image Gravitational Lens (2003)
Oguri, Masamune, Inada, Naohisa, Castander, Francisco J., Gregg, Michael D., Becker, Robert H., Ichikawa, Shin-Ichi, ...
We report the discovery of the two-image gravitationally lensed quasar SDSS J1335+0118. The object was selected as a lens candidate from the Sloan Digital Sky Survey. The imaging and spectroscopic...
A Snapshot Survey for Gravitational Lenses Among z>=4.0 Quasars: I. The z>5.7 Sample (2003)
Richards, Gordon T., Strauss, Michael A., Pindor, Bartosz, Haiman, Zoltan, Fan, Xiaohui, Eisenstein, Daniel, ...
Over the last few years, the Sloan Digital Sky Survey (SDSS) has discovered several hundred quasars with redshift between 4.0 and 6.4. Including the effects of magnification bias, one expects a...
Continuum and Emission-Line Properties of Broad Absorption Line Quasars (2003)
Reichard, Timothy A., Richards, Gordon T., Hall, Patrick B., Schneider, Donald P., Berk, Daniel E. Vanden, Fan, Xiaohui, ...
We investigate the continuum and emission-line properties of 224 broad absorption line quasars (BALQSOs) with 0.9
The Sloan Digital Sky Survey Quasar Catalog II. First Data Release (2003)
Schneider, Donald P., Fan, Xiaohui, Hall, Patrick B., Jester, Sebastian, Richards, Gordon T., Stoughton, Chris, ...
We present the second edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of 16713 objects in the SDSS First Data Release (DR1) that have luminosities larger than...
SDSS J0903+5028: A New Gravitational Lens (2003)
Johnston, David E., Richards, Gordon T., Frieman, Joshua A., Keeton, Charles R., Strauss, Michael A., Becker, Robert H., ...
We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J090334.92+502819.2. This object was targeted for SDSS spectroscopy as a Luminous Red Galaxy...
Red and Reddened Quasars in the Sloan Digital Sky Survey (2003)
Richards, Gordon T., Hall, Patrick B., Berk, Daniel E. Vanden, Strauss, Michael A., Schneider, Donald P., Weinstein, Michael A., ...
We investigate the continuum and emission line properties of 4576 SDSS quasars as a function of their optical/UV SEDs. The optical/UV color distribution of our sample is roughly Gaussian, but with a...
Anderson, Scott F., Voges, Wolfgang, Margon, Bruce, Trümper, Joachim, Agüeros, Marcel A., Boller, Thomas, ...
Many open questions in X-ray astronomy are limited by the relatively small number of objects in uniform optically-identified samples, especially when rare subclasses are considered, or subsets...
Inada, Naohisa, Becker, Robert H., Burles, Scott, Castander, Francisco J., Eisenstein, Daniel, Hall, Patrick B., ...
We report the discovery of a new gravitationally lensed quasar from the Sloan Digital Sky Survey, SDSS J092455.87+021924.9 (SDSS J0924+0219). This object was selected from among known SDSS quasars by...
Fan, Xiaohui, Strauss, Michael A., Schneider, Donald P., Becker, Robert H., White, Richard L., Haiman, Zoltan, ...
We present the discovery of three new quasars at z>6 in 1300 deg^2 of SDSS imaging data, J114816.64+525150.3 (z=6.43), J104845.05+463718.3 (z=6.23) and J163033.90+401209.6 (z=6.05). The first two...
Reichard, Timothy A., Richards, Gordon T., Schneider, Donald P., Hall, Patrick B., Tolea, Alin, Krolik, Julian H., ...
We present a catalog of 224 broad absorption line quasars (BALQSOs) from the Sloan Digital Sky Survey's Early Data Release Quasar Catalog, including a relatively complete and homogeneous subsample of...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
Double-peaked low-ionization emission lines in active galactic nuclei (2003)
Strateva, Iskra V., Strauss, Michael A., Hao, Lei, Schlegel, David J., Hall, Pat B., Gunn, James E., ...
Anderson, Scott F., Voges, Wolfgang, Margon, Bruce, Trümper, Joachim, Agüeros, Marcel A., Boller, Thomas, ...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
A gravitationally lensed quasar with quadruple images separated by 14.62arcseconds (2003)
Inada, Naohisa, Oguri, Masamune, Pindor, Bartosz, Hennawi, Joseph F., Chiu, Kuenley, Zheng, Wei, ...
Gravitational lensing is a powerful tool for the study of the distribution of dark matter in the Universe. The cold-dark-matter model of the formation of large-scale structures (that is, clusters of...
The first data release of the Sloan Digital Sky Survey (2003)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...
The first data release of the Sloan Digital Sky Survey (2003)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...
The Redshift of a Lensing Galaxy in PMN J0134-0931 (2002)
Hall, Patrick B., Richards, Gordon T., York, Donald G., Keeton, Charles R., Bowen, David V., Schneider, Donald P., ...
The Sloan Digital Sky Survey (SDSS) automatically targeted as a quasar candidate the recently discovered, gravitationally lensed, extremely reddened z=2.2 quasar PMN J0134-0931. The SDSS spectrum...
An FeLoBAL Binary Quasar (2002)
Gregg, Michael D., Becker, Robert H., White, Richard L., Richards, Gordon T., Chaffee, Fred H., Fan, Xiaohui
In an ongoing infrared imaging survey of quasars at Keck Observatory, we have discovered that the z=1.285 quasar SDSS J233646.2-010732.6 comprises two point sources with a separation of 1.67"....
Broad Emission Line Shifts in Quasars: An Orientation Measure for Radio-Quiet Quasars? (2002)
Richards, Gordon T., Berk, Daniel E. Vanden, Reichard, Timothy A., Hall, Patrick B., Schneider, Donald P., SubbaRao, Mark, ...
Using a sample of 3814 quasars from the Sloan Digital Sky Survey, we confirm that high-ionization, broad, emission lines such as CIV are significantly blueshifted with respect to low-ionization,...
Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Quasar Sample (2002)
Richards, Gordon T., Fan, Xiaohui, Newberg, Heidi Jo, Strauss, Michael A., Berk, Daniel E. Vanden, Schneider, Donald P., ...
We describe the algorithm for selecting quasar candidates for optical spectroscopy in the Sloan Digital Sky Survey. Quasar candidates are selected via their non-stellar colors in "ugriz" broad-band...
FIRST 0747+2739: A FIRST/2MASS Quasar with an Overabundance of C IV Absorption Systems (2002)
Richards, Gordon T., Gregg, Michael D., Becker, Robert H., White, Richard L.
We present a Keck ESI spectrum of FIRST 074711.2+273904, a K=15.4 quasar with redshift 4.11 that is detected by both FIRST and 2MASS. The spectrum contains at least 14 independent C IV absorption...
Exploratory Chandra observations of the three highest redshift quasars known (2002)
Brandt, William N., Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Gunn, James E., Richards, Gordon T., ...
We report on exploratory Chandra observations of the three highest redshift quasars known (z = 5.82, 5.99, and 6.28), all found in the Sloan Digital Sky Survey. These data, combined with a previous...
The Sloan Digital Sky Survey Quasar Catalog. I. Early data release (2002)
Schneider, Donald P., Richards, Gordon T., Fan, Xiaohui, Hall, Patrick B., Strauss, Michael A., Vanden Berk, Daniel E., ...
We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects ( 3000 discovered by the SDSS) in the initial SDSS public data release...
Sloan Digital Sky Survey: Early data release (2002)
Stoughton, Chirs, Lupton, Rpbert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francsico J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...
Ivezic, Zeljko, Menou, Kristen, Knapp, Gillian R., Strauss, Michael A., Lupton, Robert H., Vanden Berk, Daniel E., ...
We discuss the optical and radio properties of similar to30,000 FIRST (radio, 20 cm, sensitive to 1 mJy) sources positionally associated within 1."5 with a Sloan Digital Sky Survey (SDSS) (optical,...
Sloan Digital Sky Survey: Early Data Release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francisco J., ...
VLT Optical and Near-Infrared Observations of the z = 6.28 Quasar SDSS J1030+0524 (2002)
Pentericci, Laura, Fan, Xiaohui, Rix, Hans-Walter, Strauss, Michael A., Narayanan, Vijay K., Richards, Gordon T., ...
Newberg, Heidi Jo, Yanny, Brian, Rockosi, Connie, Grebel, Eva K., Rix, Hans-Walter, Brinkmann, Jon, ...
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey (2002)
Hall, Patrick B., Anderson, Scott F., Strauss, Michael A., York, Donald G., Richards, Gordon T., Fan, Xiaohui, ...
Sloan Digital Sky Survey: early data release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott M., Castander, Francisco J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈ 106 galaxies,...
Sloan Digital Sky Survey: early data release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott M., Castander, Francisco J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈ 106 galaxies,...
The Sloan Digital Sky Survey Quasar Catalog I. Early Data Release (2001)
Schneider, Donald P., Richards, Gordon T., Fan, Xiaohui, Hall, Patrick B., Strauss, Michael A., Berk, Daniel E. Vanden, ...
We present the first edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 3814 objects (3000 discovered by the SDSS) in the initial SDSS public data release that...
Schneider, Donald P., Knapp, Gillian R., Hawley, Suzanne L., Covey, Kevin R., Fan, Xiaohui, Ramsey, Lawrence W., ...
Low dispersion optical spectra have been obtained with the Hobby-Eberly Telescope of 22 very red objects found in early imaging data from the Sloan Digital Sky Survey. The objects are assigned...
Evidence for Reionization at z ~ 6: Detection of a Gunn-Peterson Trough in a z=6.28 Quasar (2001)
Becker, Robert H., Fan, Xiaohui, White, Richard L., Strauss, Michael A., Narayanan, Vijay K., Lupton, Robert H., ...
We present moderate resolution Keck spectroscopy of quasars at z=5.82, 5.99 and 6.28, discovered by the Sloan Digital Sky Survey (SDSS). We find that the Ly Alpha absorption in the spectra of these...
Photometric Redshifts of Quasars (2001)
Richards, Gordon T., Weinstein, Michael A., Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Berk, Daniel E. Vanden
We demonstrate that the design of the Sloan Digital Sky Survey (SDSS) filter system and the quality of the SDSS imaging data are sufficient for determining accurate and precise photometric redshifts...
The FIRST Bright Quasar Survey III. The South Galactic Cap (2001)
Becker, Robert H., White, Richard L., Gregg, Michael D., Laurent-Muehleisen, Sally A., Brotherton, Michael S., Impey, Chris D., ...
We present the results of an extension of the FIRST Bright Quasar Survey (FBQS) to the South Galactic cap, and to a fainter optical magnitude limit. Radio source counterparts with SERC R magnitudes...
Anderson, Scott F., Fan, Xiaohui, Richards, Gordon T., Schneider, Donald P., Strauss, Michael A., Berk, Daniel E. Vanden, ...
We present results on over 100 high-redshift quasars found in the Sloan Digital Sky Survey (SDSS), using automated selection algorithms applied to SDSS imaging data and with spectroscopic...
Broad Absorption Line Quasars in the Sloan Digital Sky Survey with VLA-FIRST Radio Detections (2001)
Menou, Kristen, Berk, Daniel E. Vanden, Ivezic, Zeljko, Kim, Rita S. J., Knapp, Gillian R., Richards, Gordon T., ...
We present 13 Broad Absorption Line (BAL) quasars, including 12 new objects, which were identified in the Sloan Digital Sky Survey (SDSS) and matched within 2'' to sources in the FIRST radio survey...
Intrinsic Absorption in Radio-Selected QSOs (2001)
Moderate resolution spectra have been recorded for a sample of radio-selected QSOs (z=2.5) discovered in the ``Faint Images of the Radio Sky at Twenty centimeters'' (FIRST) VLA survey. This work is...
Quasar Absorption Lines as a Function of Quasar Orientation Measures (2001)
Richards, Gordon T., Laurent-Muehleisen, S. A., Becker, Robert H., York, Donald G.
We present high resolution radio data at 3.5 and 20 cm from the VLA in the A configuration for 144 quasars with known CIV absorption line properties. Using these measurements, we compare and contrast...
Colors of 2625 Quasars at 0 (2000)
Richards, Gordon T., Fan, Xiaohui, Schneider, Donald P., Berk, Daniel E. Vanden, Strauss, Michael A., York, Donald G.
We present an empirical investigation of the colors of quasars in the Sloan Digital Sky Survey (SDSS) photometric system. The sample studied includes 2625 quasars with SDSS photometry. The quasars...
Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Gunn, James E., Richards, Gordon T., Hill, Gary J., ...
We report the discovery of 27 quasars with redshifts between 3.58 and 4.49. The objects were identified as high-redshift candidates based on their colors in Sloan Digital Sky Survey commissioning...
Discovery of a Close Pair of z = 4.25 Quasars from the Sloan Digital Sky Survey (2000)
Schneider, Donald P., Fan, Xiaohui, Strauss, Michael A., Gunn, James E., Richards, Gordon T., Knapp, G. R., ...
We report the discovery of a pair of z = 4.25 quasars with a separation of 33 arcseconds. The brighter of the two objects was identified as a high-redshift quasar candidate from Sloan Digital Sky...
The FIRST Bright Quasar Survey. II. 60 Nights and 1200 Spectra Later (2000)
Richard White, Robert Becker, Michael Gregg, Sally Laurent-Muehleisen, Chris D. Impey, Catherine E. Petry, ...
We have used the VLA FIRST survey and the APM catalog of the POSS-I plates as the basis for constructing a new radio-selected sample of optically bright quasars. This is the first radio-selected...
Richards, Gordon T., York, Donald G., Yanny, Brian, Kollgaard, Ronald I., Laurent-Muehleisen, S. A., Berk, Daniel E. Vanden
We present the results of a study of QSO Absorption Line Systems (QSOALSs) with respect to intrinsic QSO properties using an updated catalog of data in the literature. We have searched the literature...
Richards, Gordon T., Nichol, Robert C., Gray, Alexander G., Brunner, Robert J., Lupton, Robert H.
We present a catalog of 100,563 unresolved, UV-excess (UVX) quasar candidates to g = 21 from 2099 deg squared of the Sloan Digital Sky Survey (SDSS) Data Release One (DR1) imaging data. Existing...
Optically Identified BL Lacertae Objects From the Sloan Digital Sky Survey (1998)
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezic, Zeljko, Munn, Jeffrey A., Schlegel, David J., ...
We present a sample of 386 BL Lacertae candidates identified from 2860 deg(exp 2) of the Sloan Digital Sky Survey (SDSS) spectroscopic database. The candidates are primarily selected to have...