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...
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...
Taylor, Edward N, Franx, Marijn, Van Dokkum, Pieter G, Quadri, Ryan F, Gawiser, Eric, Bell, Eric F, ...
We present a new K-selected, optical-to-near-infrared photometric catalog of the Extended Chandra Deep Field South (ECDFS), making it publicly available to the astronomical community. The dataset is...
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, ...
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,...
A Catalog of Broad Absorption Line Quasars in Sloan Digital Sky Survey Data Release 5 (2008)
Gibson, Robert R., Jiang, Linhua, Brandt, W. N., Hall, Patrick B., Shen, Yue, Wu, Jianfeng, ...
We present a catalog of 5039 broad absorption line (BAL) quasars (QSOs) in the Sloan Digital Sky Survey (SDSS) Data Release 5 (DR5) QSO catalog that have absorption troughs covering a continuous...
A Nearby Old Halo White Dwarf Candidate from the Sloan Digital Sky Survey (2008)
Hall, Patrick B., Kowalski, Piotr M., Harris, Hugh C., Awal, Akshay, Leggett, S. K., Kilic, Mukremin, ...
We report the discovery of a nearby, old, halo white dwarf candidate from the Sloan Digital Sky Survey. SDSS J110217.48+411315.4 has a proper motion of 1.75 arcsec/year and redder optical colors than...
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...
A Large Sample of BL Lacs from SDSS and FIRST (2008)
Plotkin, Richard M., Anderson, Scott F., Hall, Patrick B., Margon, Bruce, Voges, Wolfgang, Schneider, Donald P., ...
We present a large sample of 501 radio-selected BL Lac candidates from the combination of the Sloan Digital Sky Survey (SDSS) Data Release 5 optical spectroscopy and from the Faint Images of the...
Rapidly Spinning Black Holes in Quasars: An Open Question (2008)
Rafiee, Alireza, Hall, Patrick B.
Wang et al. (2006) estimated an average radiative efficiency of 30% -- 35% for quasars at moderate redshift. We find that their method is not independent of quasar lifetimes and thus that quasars do...
Blanc, Guillermo A., Lira, Paulina, Barrientos, L. Felipe, Aguirre, Paula, Francke, Harold, Taylor, Edward N., ...
We present K-band imaging of two ~30'x30' fields covered by the MUSYC Wide NIR Survey. The 1030 and 1255 fields were imaged with ISPI on the 4m Blanco telescope at CTIO to a 5 sigma point-source...
Narrow associated QSO absorbers: clustering, outflows and the line-of-sight proximity effect (2008)
Wild, Vivienne, Kauffmann, Guinevere, White, Simon, York, Donald, Lehnert, Matthew, Heckman, Timothy, ...
Using data from the Sloan Digital Sky Survey data release 3 (SDSS DR3) we investigate how narrow (
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...
C_2 in Peculiar DQ White Dwarfs (2008)
Hall, Patrick B., Maxwell, Aaron J.
White dwarfs (WDs) with carbon absorption features in their optical spectra are known as DQ WDs. The subclass of peculiar DQ WDs are cool objects (T_eff45). In either case, the absorption band...
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., 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., ...
Wild, Vivienne, Kauffmann, Guinevere, White, Simon, York, Donald, Lehnert, Matthew, Heckman, Timothy, ...
A large sample of BL Lac objects from the SDSS and FIRST (2008)
Plotkin, Richard M., Anderson, Scott F., Hall, Patrick B., Margon, Bruce, Voges, Wolfgang, Schneider, Donald P., ...
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...
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 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...
Do broad absorption line quasars live in different environments from ordinary quasars? (2007)
Shen, Yue, Strauss, Michael A., Hall, Patrick B., Schneider, Donald P., York, Donald G., Bahcall, Neta A.
We select a sample of $\sim 4200$ traditionally defined broad absorption line quasars (BALQs) from the Fifth Data Release quasar catalog of the Sloan Digital Sky Survey. For a statistically...
Luminosity Functions and Evolution of Blue Galaxies In A Deep Multicolor CCD Field Survey (2007)
Charles Liu And, Charles T. Liu, Richard F. Green, Patrick B. Hall, Patrick S. Osmer
A complete sample of 659 field galaxies with 17.0!U21.1, each with U-B-VR -I7500-I8600 photometry, has been selected from a deep field survey which covers 0.83 deg 2 along six lines of sight (Hall et...
SPECTROSCOPIC OBSERVATIONS OF QUASAR CANDIDATES FROM A DEEP MULTICOLOR SURVEY (2007)
Patrick S. Osmer, Julia Kennefick, Patrick B. Hall, Richard F. Green
We have made spectroscopic observations of 57 additional quasar candidates from the survey of Hall et al (Papers I and II). To date we have identified 13 new quasars
Patrick B. Hall, Patrick S. Osmer, Richard F. Green, Alain C. Porter, Stephen J. Warren
We have used the KPNO 4-meter Mayall telescope to image 0.83 square degrees of sky in six fields at high galactic latitude in six filters spanning 3000-10000 A to magnitude limits ranging from 22.1...
A DEEP MULTICOLOR SURVEY I. IMAGING OBSERVATIONS AND CATALOG OF STELLAR OBJECTS 1 (2007)
Patrick B. Hall, Patrick S. Osmer, Richard F. Green, Alain C. Porter, Stephen J. Warren
We have used the KPNO 4-meter Mayall telescope to image 0.83 square degrees of sky in six fields at high galactic latitude in six filters spanning 3000-10000 A to magnitude limits ranging from 22.1...
Moderately and Extremely Red Galaxies in the Fields of Radio-Loud Quasars at (2007)
Patrick B. Hall, Marcin Sawicki, Huan Lin
Abstract. We present new studies of an excess population of mainly red galaxies around a sample of 31 radio-loud quasars at z = 1 \Gamma 2. These fields have a surface density of extremely red...
Patrick B. Hall, Paul Martini, D. L. Depoy, Ian Gatley
A candidate radio-loud broad absorption line quasar (RLBAL) has been reported by Becker et al. (1997). We present JHK observations of this object and three other radiodetected BALs taken with the new...
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...
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...
Acceleration and Substructure Constraints in a Quasar Outflow (2007)
Hall, Patrick B., Sadavoy, Sarah I., Hutsemekers, Damien, Everett, John E., Rafiee, Alireza
We present observations of probable line-of-sight acceleration of a broad absorption trough of C IV in the quasar SDSS J024221.87+004912.6. We also discuss how the velocity overlap of two other...
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...
Dufour, P., Bergeron, P., Liebert, James, Harris, H. C., Knapp, G. R., Hall, Patrick B., ...
We present a detailed analysis of a large spectroscopic and photometric sample of DZ white dwarfs based on our latest model atmosphere calculations. We revise the atmospheric parameters of the...
Muzzin, Adam, Yee, H. K. C., Hall, Patrick B., Lin, H.
Using K-band imaging for 15 of the Canadian Network for Observational Cosmology (CNOC1) clusters we examine the near-infrared properties of moderate-redshift (0.19 < z < 0.55) galaxy clusters. We...
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...
HUBBLE SPACE TELESCOPE ULTRAVIOLET SPECTROSCOPY OF 14 LOW-REDSHIFT QUASARS (2007)
Ganguly, Rajib, Brotherton, Michael S., Arav, Nahum, Heap, Sara R., Wisotzki, Lutz, Aldcroft, Thomas L., ...
We present low-resolution ultraviolet spectra of 14 low-redshift (zem ≤ 0:8) quasars observed with the Hubble Space Telescope STIS as part of a Snapshot project to understand the relationship...
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., Agüeros, 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...
Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...
Publicación ISI
Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...
Publicación ISI
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...
Quadri, Ryan, Marchesini, Danilo, Van Dokkum, Pieter, Gawiser, Eric, Franx, Marijn, Lira, Paulina, ...
We present deep near-infrared JHK imaging of four 10'x10' fields. The observations were carried out as part of the Multiwavelength Survey by Yale-Chile (MUSYC) with ISPI on the CTIO 4m telescope. The...
Muzzin, Adam, Yee, H. K. C., Hall, Patrick B., Ellingson, E., Lin, H.
We present K-band imaging for 15 of the Canadian Network for Observational Cosmology (CNOC1) clusters. The cluster luminosity density and number density profiles can be described by NFW models with...
A Balmer-line Broad Absorption Line Quasar (2006)
I report the discovery of blueshifted broad absorption line (BAL) troughs in at least six transitions of the Balmer series of hydrogen (Hbeta to H9) and in CaII, MgII and excited FeII in the quasar...
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
Lundgren, Britt F., Wilhite, Brian C., Brunner, Robert J., Hall, Patrick B., Schneider, Donald P., York, Donald G., ...
We present a time-variability analysis of 29 broad absorption line quasars (BALQSOs) observed in two epochs by the Sloan Digital Sky Survey (SDSS). These spectra are selected from a larger sample of...
Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars (2006)
Ganguly, Rajib, Brotherton, Michael S., Arav, Nahum, Heap, Sara R., Wisotzki, Lutz, L. Aldcroft, Thomas, ...
We present low-resolution ultraviolet spectra of 14 low redshift (z em < 0.8) quasars observed with HST/STIS as part of a Snap project to understand the relationship between quasar outflows and...
Hubble Space Telescope Ultraviolet Spectroscopy of Fourteen Low-Redshift Quasars (2006)
Ganguly, Rajib, Brotherton, Michael S., Arav, Nahum, Heap, Sara R., Wisotzki, Lutz, Aldcroft, Thomas L., ...
We present low-resolution ultraviolet spectra of 14 low redshift (z
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),...
Chandra Observations of Red Sloan Digital Sky Survey Quasars (2006)
Hall, Patrick B., Gallagher, S. C., Richards, G. T., Alexander, D. M., Anderson, S. F., Bauer, F., ...
We present short \chandra observations of twelve bright (i
Cosmological Constraints from the Red-Sequence Cluster Survey (2006)
Gladders, Michael D., Yee, H. K. C., Majumdar, Subhabrata, Barrientos, L. Felipe, Hoekstra, Henk, Hall, Patrick B., ...
[abridged] We present a first cosmological analysis of a refined cluster catalog from the Red-Sequence Cluster Survey (RCS). The input cluster sample is derived from 72.07 square degrees of imaging...
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...
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, ...
Collinge, Matthew J., Strauss, Michael A., Hall, Patrick B., Ivezić, Zeljko, Munn, Jeffrey A., Schlegel, David J., ...
Spectral decomposition of broad-line AGNs and host galaxies (2006)
Vanden Berk, Daniel E., Shen, Jiajian, Yip, Ching-Wa, Schneider, Donald P., Connolly, Andrew J., Burton, Ross E., ...
Using an eigenspectrum decomposition technique, we separate the host galaxy from the broad-line active galactic nucleus (AGN) in a set of 4666 spectra from the Sloan Digital Sky Survey (SDSS), from...
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...
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, ...
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...
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...
Spectral Decomposition of Broad-Line AGNs and Host Galaxies (2005)
Berk, Daniel E. Vanden, Shen, Jiajian, Yip, Ching-Wa, Schneider, Donald P., Connolly, Andrew J., Burton, Ross E., ...
Using an eigenspectrum decomposition technique, we separate the host galaxy from the broad line active galactic nucleus (AGN) in a set of 4666 spectra from the Sloan Digital Sky Survey (SDSS), from...
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...
Ellison, Sara L., Hall, Patrick B., Lira, Paulina
The presence of dust in quasar absorbers, such as damped Lyman alpha (DLA) systems, may cause the background QSO to appear reddened. We investigate the extent of this potential reddening by comparing...
Anderson, Scott F., Haggard, Daryl, Homer, Lee, Joshi, Nikhil R., Margon, Bruce, Silvestri, Nicole M., ...
AM CVn systems are a rare (about a dozen previously known) class of cataclysmic variables, arguably encompassing the shortest orbital periods (down to about 10 minutes) of any known binaries. Both...
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...
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...
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, ...
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'',...
RCS043938-2904.9: A New Rich Cluster of Galaxies at z=0.951 (2004)
Barrientos, L. Felipe, Gladders, Michael D., Yee, H. K. C., Infante, Leopoldo, Ellingson, Erica, Hall, Patrick B., ...
We present deep I, J_s, K_s imaging and optical spectroscopy of the newly discovered Red-Sequence Cluster Survey cluster RCS043938-2904.9. This cluster, drawn from an extensive preliminary list, was...
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...
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...
A Quasar Without Broad Lyman-alpha Emission (2004)
Hall, Patrick B., Snedden, Stephanie A., Niederste-Ostholt, Martin, Eisenstein, Daniel J., Strauss, Michael A., York, Donald G., ...
The z=3.02 quasar SDSS J095253.83+011421.9 exhibits broad metal-line emission (CIV FWHM=9000 km/s), but broad Ly-alpha emission is not present. Instead, only a narrow Ly-alpha line is observed...
Detections of the 2175 \AA Dust Feature at 1.4z 1.5 from the Sloan Digital Sky Survey (2004)
Wang, Junfeng, Hall, Patrick B., Ge, Jian, Li, Aigen, Schneider, Donald P.
The strongest spectroscopic dust extinction feature in the Milky Way, the broad absorption bump at 2175 \AA, is generally believed to be caused by aromatic carbonaceous materials -- very likely a...
Unconventional AGN from the SDSS (2004)
Hall, Patrick B., Knapp, G. R., Richards, G. T., Strauss, M. A., Anderson, S. F., Schneider, D. P., ...
We discuss some of the most unusual active galactic nuclei (AGN) discovered to date by the Sloan Digital Sky Survey (SDSS): the first broad absorption line quasar seen to exhibit He II absorption,...
A Lyman-alpha-only AGN from the Sloan Digital Sky Survey (2004)
Hall, Patrick B., Hoversten, Erik A., Tremonti, Christy A., Berk, Daniel E. Vanden, Schneider, Donald P., Strauss, Michael A., ...
The Sloan Digital Sky Survey has discovered a z=2.4917 radio-loud active galactic nucleus (AGN) with a luminous, variable, low-polarization UV continuum, H I two-photon emission, and a moderately...
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...
Nitrogen Enriched Quasars in the Sloan Digital Sky Survey First Data Release (2004)
Bentz, Misty C., Hall, Patrick B., Osmer, Patrick S.
The quasar Q0353-383 has long been known to have extremely strong nitrogen intercombination lines at 1486 and 1750 Angstroms, implying an anomalously high nitrogen abundance of ~15 times solar. A...
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., ...
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., ...
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, 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 deg2 of five-band (ugriz) imaging data with photometry for...
A Ly alpha-only active galactic nucleus from the Sloan Digital Sky Survey (2004)
Hall, Patrick B., Hoversten, E. A., Tremonti, Christy A., Vanden Berk, Daniel E., Schneider, Donald P., Strauss, Michael A., ...
The Sloan Digital Sky Survey has discovered a z = 2.4917 radio-loud active galactic nucleus (AGN) with a luminous, variable, low-polarization UV continuum, H I two-photon emission, and a moderately...
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...
A Ly alpha-only active galactic nucleus from the Sloan Digital Sky Survey (2004)
Hall, Patrick B., Hoversten, E. A., Tremonti, Christy A., Vanden Berk, Daniel E., Schneider, Donald P., Strauss, Michael A., ...
The Sloan Digital Sky Survey has discovered a z = 2.4917 radio-loud active galactic nucleus (AGN) with a luminous, variable, low-polarization UV continuum, H I two-photon emission, and a moderately...
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 Quasars and Dust Reddening (2003)
Hall, Patrick B., Hopkins, Philip, Strauss, Michael, Richards, Gordon, Brinkmann, J.
The Sloan Digital Sky Survey can be used to detect and characterize red and reddened quasars. In Richards et al. (2003), we showed that 6% of SDSS quasars have red colors consistent with significant...
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...
An MHD-driven Disk Wind Outflow in SDSS J0300+0048? (2003)
Hall, Patrick B., Hutsemekers, Damien
The outflow in SDSS J030000.56+004828.0 has the highest low-ionization metal-line column density yet reported for a broad absorption line quasar. The absorption from different ions is also segregated...
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...
Stern, Daniel, Hall, Patrick B., Barrientos, L. Felipe, Bunker, Andrew J., Elston, Richard, Ledlow, M. J., ...
We report an infrared 1-1.8 micron (J+H-bands), low-resolution (R=450) spectrogram of the highest-redshift radio-loud quasar currently known, SDSS J083643.85+005453.3, obtained during the...
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...
Mass and dust in the disk of a spiral lens galaxy (2003)
Winn, Joshua N., Hall, Patrick B., Schechter, Paul L.
Gravitational lensing is a potentially important probe of spiral galaxy structure, but only a few cases of lensing by spiral galaxies are known. We present Hubble Space Telescope and Magellan...
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...
Peculiar Broad Absorption Line Quasars found in DPOSS (2003)
Brunner, Robert J., Hall, Patrick B., Djorgovski, S. George, Gal, R. R., Mahabal, A. A., Lopes, P. A. A., ...
With the recent release of large (i.e., > hundred million objects), well-calibrated photometric surveys, such as DPOSS, 2MASS, and SDSS, spectroscopic identification of important targets is no longer...
The Incidence of Strong-Lensing Clusters in the Red-Sequence Cluster Survey (2003)
Gladders, Michael D., Hoekstra, Henk, Yee, H. K. C., Hall, Patrick B., Barrientos, L. Felipe
The incidence of giant arcs due to strong-lensing clusters of galaxies is known to be discrepant with current theoretical expectations. This result derives from a comparison of several cluster...
VLT+UVES Spectroscopy of the CaII LoBAL Quasar SDSS J030000.56+004828.0 (2003)
Hall, Patrick B., Hutsemekers, Damien, Anderson, S. F., Brinkmann, J., Fan, X., Schneider, D. P., ...
We study high-resolution spectra of the `overlapping-trough' low-ionization broad absorption line (LoBAL) quasar SDSS J030000.56+004828.0. The CaII, MgII and MgI column densities in this object are...
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...
Szkody, Paula, Anderson, Scott F., Schmidt, Gary, Hall, Patrick B., Margon, Bruce, Miceli, Antonino, ...
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, ...
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, ...
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...
VLT Observations of Two Unusual BAL Quasars (2002)
Hall, Patrick B., Hutsemekers, Damien
Among the unusual broad absorption line quasars being found by the Sloan Digital Sky Survey (SDSS) are objects with much stronger absorption in Fe III than Fe II. These unusual line ratios require a...
2MASS 1315-2649: A High Proper Motion L Dwarf with Strong H-alpha Emission (2002)
In Hall (2002) I reported that 2MASSI J1315309-264951 is an L dwarf with strong H-alpha emission. Two spectroscopic epochs appeared to show that the H-alpha was variable, decreasing from 121...
Szkody, Paula, Anderson, Scott F., Schmidt, Gary, Hall, Patrick B., Margon, Bruce, Miceli, Antonino, ...
Two newly identified magnetic cataclysmic variables discovered in the Sloan Digital Sky Survey (SDSS), SDSSJ155331.12+551614.5 and SDSSJ132411.57+032050.5, have spectra showing highly prominent,...
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...
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,...
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey (2002)
Hall, Patrick B., Anderson, S. F., Strauss, M. A., York, D. G., Richards, G. T., Fan, X., ...
The Sloan Digital Sky Survey has confirmed the existence of populations of broad absorption line (BAL) quasars with various unusual properties. We present and discuss twenty-three such objects and...
A measurement of weak lensing by large scale structure in RCS fields (2002)
Hoekstra, Henk, Yee, Howard K. C., Gladders, Michael D., Barrientos, L. Felipe, Hall, Patrick B., Infante, Leopoldo
We have analysed ~24 square degrees of R_C-band imaging data from the Red-Sequence Cluster Survey (RCS), and measured the excess correlations between galaxy ellipticities on scales ranging from 1 to...
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...
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...
Sloan Digital Sky Survey: Early Data Release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francisco J., ...
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,...
2MASSI J1315309-264951: An L Dwarf with Strong and Variable H-alpha Emission (2001)
2MASSI J1315309-264951 is an L3 dwarf with strong H-alpha emission discovered in the course of a color-selected survey for active galactic nuclei using the Two-Micron All-Sky Survey (2MASS). The...
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...
Extreme BAL Quasars from the Sloan Digital Sky Survey (2001)
Hall, Patrick B., Gunn, J. E., Knapp, G. R., Narayanan, V. K., Strauss, M. A., Anderson, S. F., ...
The Sloan Digital Sky Survey has discovered a population of broad absorption line quasars with various extreme properties. Many show absorption from metastable states of FeII with varying...
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...
Quasars in the 2MASS Second Incremental Data Release (2001)
Barkhouse, Wayne A., Hall, Patrick B.
Using the 2MASS Second Incremental Data Release, we have searched for near infrared counterparts to 13214 quasars from the Veron-Cetty & Veron(2000) catalog. We have detected counterparts within 4...
Very Red and Extremely Red Galaxies in the Fields of z ~ 1.5 Radio-Loud Quasars (2001)
Hall, Patrick B., Sawicki, Marcin, Martini, Paul, Finn, Rose A., Pritchet, C. J., Osmer, Patrick S., ...
We previously identified an excess of mostly red galaxies around 31 RLQs at z=1-2. These fields have an ERO (extremely red object, R-K>6) density 2.7 times higher than the field. Assuming the EROs...
Faint quasar surveys are necessary complements to bright quasar surveys to remove the degeneracy between redshift and luminosity inherent in any single magnitude-limited sample. I discuss two ongoing...
Active Galactic Nuclei in the CNOC2 Field Galaxy Redshift Survey (2000)
Hall, Patrick B., Yee, H. K. C., Lin, Huan, Morris, Simon L., Patton, David R., Sawicki, Marcin, ...
We present a sample of 47 confirmed and 14 candidate Active Galactic Nuclei (AGN) discovered in the Canadian Network for Observational Cosmology field galaxy redshift survey (CNOC2). The sample...
Spectroscopic Gravitational Lens Candidates in the CNOC2 Field Galaxy Redshift Survey (2000)
Hall, Patrick B., Yee, H. K. C., Lin, Huan, Morris, Simon L., Gladders, Michael D., Carlberg, R. G., ...
We present five candidate gravitational lenses discovered spectroscopically in the Canadian Network for Observational Cosmology Field Galaxy Redshift Survey (CNOC2), along with one found in followup...
Properties of Candidate Cluster Galaxies at z=1--2 (1998)
I discuss the properties of a population of candidate cluster galaxies recently identified in the fields of radio-loud quasars at z=1--2. The magnitude, spatial, and color distributions of the excess...
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...
A Deep Multicolor Survey. IV. The Electronic Stellar Catalog (1998)
Osmer, Patrick S., Kennefick, Julia D., Hall, Patrick B., Green, Richard F.
We make available in electronic form the stellar catalog of 19,494 objects from the Deep Multicolor Survey (DMS). The DMS is based on CCD imaging with the Mayall 4-m telescope in U,B,V,R',I75,I86 and...
Hall, Patrick B., Green, Richard F., Cohen, Martin
We have conducted an optical/near-infrared study of the environments of radio-loud quasars (RLQs) at redshifts z=0.6-2. In this paper we discuss the sample selection and observations for the z=1-2...
An Optical/Near-Infrared Study of Radio-Loud Quasar Environments II. Imaging Results (1998)
Hall, Patrick B., Green, Richard F.
We use optical and near-IR imaging to examine the properties of the significant excess population of K>=19 galaxies found in the fields of 31 z=1-2 radio-loud quasars by Hall, Green & Cohen (1998)....
Luminosity Functions And Evolution Of Blue Galaxies In A Deep Multicolor CCD Field Survey (1998)
Liu, Charles T., Green, Richard F., Hall, Patrick B., Osmer, Patrick S.
A complete sample of 659 field galaxies with 17.0$
Kennefick, Julia D., Osmer, Patrick S., Hall, Patrick B., Green, Richard F.
We have made spectroscopic identifications of 39 additional quasar candidates from the Deep Multicolor Survey (DMS) of Hall et al. (1996, ApJ, 462, 614, astro-ph/9512052). We have identified 9 new...
Hall, Patrick B., Martini, Paul, Depoy, D. L., Gatley, Ian
A candidate radio-loud broad absorption line quasar (RLBAL) has been reported by Becker et al. (1997). We present JHK observations of this object and three other radio-detected BALs taken with the...
X-ray Emission from the Host Clusters of Powerful AGN (1996)
Hall, Patrick B., Ellingson, Erica, Green, Richard F.
(Abridged) We report the detection of X-ray emission from the host cluster of the radio-quiet quasar H1821+643 with the ROSAT HRI, and the non-detection of the host cluster of the radio-loud quasar...
A Deep Multicolor Survey I. Imaging Observations and Catalog of Stellar Objects (1995)
Hall, Patrick B., Osmer, Patrick S., Green, Richard F., Porter, Alain C., Warren, Stephen J.
We have used the KPNO 4-meter Mayall telescope to image 0.83 square degrees of sky in six fields at high galactic latitude in six filters spanning 3000-10000\AA\ to magnitude limits ranging from 22.1...
Hall, Patrick B., Osmer, Patrick S., Green, Richard F., Porter, Alain C., Warren, Stephen J.
We have used the KPNO 4-meter Mayall telescope to image 0.83 square degrees of sky in six fields at high galactic latitude in six filters spanning 3000-10000\AA\ to magnitude limits ranging from 22.1...
A ROSAT Search for X-ray Emission from Quasar Host Clusters (1995)
Hall, Patrick B., Ellingson, Erica, Green, Richard F., Yee, Howard
We report the results of a search for X-ray emission from quasar host clusters at moderate redshift using the {\sl ROSAT} HRI. We detect no emission from the host clusters of 3C~263 (z=0.646) and...