Donald G. York

Ten More New Sightlines for the Study of Intergalactic Helium, and Hundreds of Far-UV-Bright Quasars, from SDSS, GALEX, and HST (2009)

Syphers, David, Anderson, Scott F., Zheng, Wei, Haggard, Daryl, Meiksin, Avery, Schneider, Donald P., ...

Absorption along quasar sightlines remains among the most sensitive direct measures of HeII reionization in much of the intergalactic medium (IGM). Until recently, fewer than a half-dozen unobscured...

A Search for Oxygen in the Low-Density Lyman-alpha Forest Using the Sloan Digital Sky Survey (2009)

Pieri, Matthew M., Frank, Stephan, Mathur, Smita, Weinberg, David H., York, Donald G., Oppenheimer, Benjamin D.

We use 2167 Sloan Digital Sky Survey (SDSS) quasar spectra to search for low-density oxygen in the Intergalactic Medium (IGM). Oxygen absorption is detected on a pixel-by-pixel basis by its...

Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample (2009)

Percival, Will J., Reid, Beth A., Eisenstein, Daniel J., Bahcall, Neta A., Budavari, Tamas, Frieman, Joshua A., ...

The spectroscopic Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) galaxy sample represents the final set of galaxies observed using the original SDSS target selection criteria. We analyse the...

Cosmological Constraints from the Clustering of the Sloan Digital Sky Survey DR7 Luminous Red Galaxies (2009)

Reid, Beth A., Percival, Will J., Eisenstein, Daniel J., Verde, Licia, Spergel, David N., Skibba, Ramin A., ...

We present the power spectrum of the reconstructed halo density field derived from a sample of Luminous Red Galaxies (LRGs) from the Sloan Digital Sky Survey Seventh Data Release (DR7). The halo...

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 MIKE + UVES survey of Sub-Damped Lyman-Alpha Systems at z (2009)

Meiring, Joseph D., Lauroesch, James T., Kulkarni, Varsha P., Peroux, Celine, Khare, Pushpa, York, Donald G.

We have combined the results from our recent observations of Damped and sub-Damped Lyman-alpha systems with the MIKE and UVES spectrographs on the Magellan Clay and VLT Kueyen telescopes with ones...

A Cross-Correlation Analysis of Mg II Absorption Line Systems and Luminous Red Galaxies from the SDSS DR5 (2009)

Lundgren, Britt F., Brunner, Robert J., York, Donald G., Ross, Ashley J., Quashnock, Jean M., Myers, Adam D., ...

We analyze the cross-correlation of 2,705 unambiguously intervening Mg II (2796,2803A) quasar absorption line systems with 1,495,604 luminous red galaxies (LRGs) from the Fifth Data Release of the...

New Magellan Inamori Kyocera Echelle Observations of z (2009)

Meiring, Joseph D., Kulkarni, Varsha P., Lauroesch, James T., Peroux, Celine, Khare, Pushpa, York, Donald G.

The Damped and sub-Damped Lyman-alpha (DLA and sub-DLA) systems seen in the spectra of QSOs offer a unique way to study the interstellar medium of high redshift galaxies. In this paper we report on...

The Red Rectangle: Its Shaping Mechanism and its Source of Ultraviolet Photons (2008)

Witt, Adolf N., Vijh, Uma P., Hobbs, L. M., Aufdenberg, Jason P., Thorburn, Julie A., York, Donald G.

The proto-planetary Red Rectangle nebula is powered by HD 44179, a spectroscopic binary (P = 318 d), in which a luminous post-AGB component is the primary source of both luminosity and current mass...

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...

Molecular Hydrogen in the FUSE Translucent Lines of Sight: The Full Sample (2008)

Rachford, Brian L., Snow, Theodore P., Destree, Joshua D., Ross, Teresa L., Ferlet, Roger, Friedman, Scott D., ...

We report total abundances and related parameters for the full sample of the FUSE survey of molecular hydrogen in 38 translucent lines of sight. New results are presented for the "second half" of the...

A High Yield of New Sightlines for the Study of Intergalactic Helium: Far-UV-Bright Quasars from SDSS, GALEX, and HST (2008)

Syphers, David, Anderson, Scott F., Zheng, Wei, Haggard, Daryl, Meiksin, Avery, Chiu, Kuenley, ...

Investigations of He II Ly-alpha (304 A rest) absorption toward a half-dozen quasars at z~3-4 have demonstrated the great potential of helium studies of the IGM, but the current critically small...

Five New High-Redshift Quasar Lenses from the Sloan Digital Sky Survey (2008)

Inada, Naohisa, Oguri, Masamune, Shin, Min-Su, Kayo, Issha, Strauss, Michael A., Morokuma, Tomoki, ...

We report the discovery of five gravitationally lensed quasars from the Sloan Digital Sky Survey (SDSS). All five systems are selected as two-image lensed quasar candidates from a sample of...

Mass models and environment of the new quadruply lensed quasar SDSS J1330+1810 (2008)

Oguri, Masamune, Inada, Naohisa, Blackburne, Jeffrey A., Shin, Min-Su, Kayo, Issha, Strauss, Michael A., ...

We present the discovery of a new quadruply lensed quasar. The lens system, SDSS J1330+1810 at z_s=1.393, was identified as a lens candidate from the spectroscopic sample of the Sloan Digital Sky...

Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded Field Photometry and Cluster Fiducial Sequences in ugriz (2008)

An, Deokkeun, Johnson, Jennifer A., Clem, James L., Yanny, Brian, Rockosi, Constance M., Morrison, Heather L., ...

We present photometry for globular and open cluster stars observed with the Sloan Digital Sky Survey (SDSS). In order to exploit over 100 million stellar objects with r < 22.5 mag observed by SDSS,...

The Milky Way Tomography with SDSS: II. Stellar Metallicity (2008)

Ivezic, Zeljko, Sesar, Branimir, Juric, Mario, Bond, Nicholas, Dalcanton, Julianne, Rockosi, Constance M., ...

Using effective temperature and metallicity derived from SDSS spectra for ~60,000 F and G type main sequence stars (0.2

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...

The Ghost of Sagittarius and Lumps in the Halo of the Milky Way (2008)

Heidi Jo Newberg, Connie Rockosi, Eva K. Grebel, Jon Brinkmann, Istvan Csabai, Greg Hennessy, ...

We identify new structures in the halo of the Milky Way Galaxy from positions, colors and magnitudes of five million stars detected in the Sloan Digital Sky Survey. Most of these stars are within...

The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on dark energy from the third data release quasar lens catalog (2008)

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...

The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical lens sample from the third data release (2008)

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...

A NEW CATALOG OF DIFFUSE INTERSTELLAR BANDS (2008)

Hobbs, Lewis M., York, Donald G., Snow, Theodore P., Oka, Takeshi, Thorburn, Julie A., Bishof, Michael, ...

Author Institution: University of Chicago, Yerkes Observatory, Williams Bay, WI 53191; University of Chicago, Chicago, IL 60637; University of Colorado, Boulder, CO 80309; University of Chicago,...

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 Sloan Digital Sky Survey quasar lens search. III. Constraints on dark energy from the Third Data Release Quasar Lens Catalog (2008)

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...

The milky way tomography with SDSS. II. Stellar metallicity (2008)

Ivezic, Zeljko, Sesar, Branimir, Juric, Mario, Bond, Nicholas, Dalcanton, Julianne, Rockosi, Constance M., ...

Using effective temperature and metallicity derived from SDSS spectra for ~60,000 F- and G-type main-sequence stars (0.2

The Sloan Digital Sky Survey quasar lens search. II. Statistical lens sample from the Third Data Release (2008)

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 chemical compositions of 10 new sub-DLAs and strong Lyman-limit systems at z < 1.5 (2007)

Meiring, Joseph D., Kulkarni, Varsha P., Lauroesch, James T., Peroux, Celine, Khare, Pushpa, York, Donald G., ...

We present chemical abundance measurements from medium resolution observations of 8 sub-damped Lyman-alpha absorber and 2 strong Lyman-limit systems at z < 1.5 observed with the MIKE spectrograph on...

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...

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...

The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog (2007)

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...

The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical Lens Sample from the Third Data Release (2007)

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...

Discovery of Four Gravitationally Lensed Quasars from the Sloan Digital Sky Survey (2007)

Oguri, Masamune, Inada, Naohisa, Clocchiatti, Alejandro, Kayo, Issha, Shin, Min-Su, Hennawi, Joseph F., ...

We present the discovery of four gravitationally lensed quasars selected from the spectroscopic quasar catalog of the Sloan Digital Sky Survey. We describe imaging and spectroscopic follow-up...

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...

A Catalogue of Morphologically Classified Galaxies from the Sloan Digital Sky Survey: North Equatorial Region (2007)

Fukugita, Masataka, Nakamura, Osamu, Okamura, Sadanori, Yasuda, Naoki, Barentine, John C., Brinkmann, Jon, ...

We present a catalogue of morphologically classified bright galaxies in the north equatorial stripe (230 deg$^2$) derived from the Third Data Release of the Sloan Digital Sky Survey (SDSS)....

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...

9.7 micrometer Silicate Absorption in a Damped Lyman-alpha Absorber at z=0.52 (2007)

Kulkarni, Varsha P., York, Donald G., Vladilo, Giovanni, Welty, Daniel E.

We report a detection of the 9.7 micrometer silicate absorption feature in a damped Lyman-alpha (DLA) system at z_{abs} = 0.524 toward AO0235+164, using the Infrared Spectrograph (IRS) onboard the...

New abundance determinations in z < 1.5 QSO absorbers: seven sub-DLAs and one DLA (2007)

Meiring, Joseph D., Lauroesch, James T., Kulkarni, Varsha P., Peroux, Celine, Khare, Pushpa, York, Donald G., ...

We present chemical abundance measurements from high resolution observations of 7 sub-damped Lyman-alpha absorbers and 1 damped Lyman-alpha system at z

Discovery of a gravitationally lensed quasar from the Sloan Digital Sky Survey: SDSS J133222.62+034739.9 (2007)

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,...

Andromeda X, a new dwarf spheroidal satellite of M31: photometry (2007)

Zucker, Daniel B., Kniazev, Alexei Y., Martínez-Delgado, David, Bell, Eric F., Rix, Hans-Walter, Grebel, Eva K., ...

We report the discovery of Andromeda X, a new dwarf spheroidal satellite of M31, based on stellar photometry from the Sloan Digital Sky Survey. Using follow-up imaging data we have estimated its...

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...

Two stellar components in the halo of the Milky Way (2007)

Carollo, Daniela, Beers, Timothy C., Lee, Young Sun, Chiba, Masashi, Norris, John E., Wilhelm, Ronald, ...

The halo of the Milky Way provides unique elemental abundance and kinematic information on the first objects to form in the Universe, and this information can be used to tightly constrain models of...

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...

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...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

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...

Broad Absorption Line Variability in Repeat Quasar Observations from the Sloan Digital Sky Survey (2006)

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...

Discovery of a Gravitationally Lensed Quasar from the Sloan Digital Sky Survey: SDSS J133222.62+034739.9 (2006)

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...

A Large, Uniform Sample of X-ray Emitting AGN from the ROSAT All-Sky and Sloan Digital Sky Surveys: the Data Release 5 Sample (2006)

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),...

Optical Emission Band Morphologies of the Red Rectangle (2006)

Vijh, Uma P., Witt, Adolf N., York, Donald G., Dwarkadas, Vikram V., Woodgate, Bruce E., Palunas, Povilas

We present narrow-band images of the Red Rectangle (RR) nebula which reveal the distinct morphologies of this intriguing nebula in different optical emission bands. The morphology of the RR nebula in...

Discovery of a Metal-Line Absorber Associated with a Local Dwarf Starburst Galaxy (2006)

Keeney, Brian A., Stocke, John T., Rosenberg, Jessica L., Tumlinson, Jason, York, Donald G.

We present optical and near-infrared images, H I 21 cm emission maps, optical spectroscopy, and Hubble Space Telescope/Space Telescope Imaging Spectrograph ultraviolet spectroscopy of the QSO/galaxy...

The nature of damped Lyman alpha and sub-damped Lyman alpha absorbers (2006)

Khare, Pushpa, Kulkarni, Varsha P., Peroux, Celine, York, Donald G., Lauroesch, James T., Meiring, Joseph. D.

We present arguments based on the measured abundances in individual damped Lyman alpha systems (DLAs) and sub-damped Lyman alpha systems (sub-DLAs), and also the average abundances inferred in large...

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...

Elemental Abundance Measurements in Low-redshift Damped Lyman Alpha Absorbers (2006)

Meiring, Joseph D., Kulkarni, Varsha P., Khare, Pushpa, Bechtold, Jill, York, Donald G., Cui, Jun, ...

We present elemental abundance measurements for 9 damped Ly-alpha systems (DLAs) and 1 sub-DLA at 0.1 < z < 1.5 from recent observations with the Multiple Mirror Telescope. Most of these absorbers...

Andromeda X, A New Dwarf Spheroidal Satellite of M31: Photometry (2006)

Zucker, Daniel B., Kniazev, Alexei Y., Martinez-Delgado, David, Bell, Eric F., Rix, Hans-Walter, Grebel, Eva K., ...

We report the discovery of Andromeda X, a new dwarf spheroidal satellite of M31, based on stellar photometry from the Sloan Digital Sky Survey (SDSS). Using follow-up imaging data we have estimated...

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 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...

VELOCITY STRUCTURE IN THE DIFFUSE INTERSTELLAR BANDS (2006)

Drosback, Meredith M., Snow, T. P., Thorburn, J. A., Hobbs, L. M., Welty, D. E., York, Donald G., ...

Author Institution: Center for Astrophysics and Space Astronomy, University of Colorado; Department of Astronomy and Astrophysics, The University of Chicago; Departments of Chemistry and Astronomy,...

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...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

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...

Cosmological constraints from the SDSS luminous red galaxies (2006)

Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...

We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...

SDSS J0806+2006 and SDSS J1353+1138: Two New Gravitationally Lensed Quasars from the Sloan Digital Sky Survey (2005)

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...

The Milky Way Tomography with SDSS: I. Stellar Number Density Distribution (2005)

Juric, Mario, Ivezic, Zeljko, Brooks, Alyson, Lupton, Robert H., Schlegel, David, Finkbeiner, Douglas, ...

Abridged: We estimate the distances to ~48 million stars detected by the Sloan Digital Sky Survey and map their 3D number density distribution in 100 < D < 20 kpc range over 6,500 deg^2 of sky. The...

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...

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 Evolution of Damped Lyman-alpha Absorbers: Metallicities and Star Formation Rates (2005)

Kulkarni, Varsha P., York, Donald G., Lauroesch, James T., Fall, S. Michael, Khare, Pushpa, Woodgate, Bruce E., ...

The damped Lyman-alpha (DLA) and sub-DLA quasar absorption lines provide powerful probes of the evolution of metals, gas, and stars in galaxies. One major obstacle in trying to understand the...

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...

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...

Discovery of two gravitationally lensed quasars with image separations of 3" from the Sloan Digital Sky Survey (2005)

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",...

A COMPLETE SPECTROSCOPIC MAP AND NARROW-BAND IMAGING OF SMALL PAHS IN THE RED RECTANGLE NEBULA (2005)

Vijh, Uma P., Witt, Adolf N., York, Donald G., Dwarkadas, Vikram, Woodgate, Bruce E., Palunas, Povilas

Author Institution: Ritter Astrophysical Research Center, Univeristy of Toledo, Toledo, OH 43606; University of Chicago, Chicago, IL 60637; NASA Goddard Space Flight Center, Greenbelt, MD 20771;...

LINE PROFILES IN THE DIFFUSE INTERSTELLAR BANDS (2005)

Drosback, Meredith M., Snow, T. P., Thorburn, J. A., Hobbs, L. M., Welty, D. E., York, Donald G., ...

Author Institution: University of Colorado, Center for Astrophysics and Space; Astronomy,; 389 UCB, Boulder CO 80309-0389; Department of Astronomy and Astrophysics, The University of; Chicago;...

CORRELATIONS AMONG DIFFUSE INTERSTELLAR BANDS, ATOMS, AND SMALL MOLECULES (2005)

McCall, Benjamin J., Adamkovics, M., Rachford, B. L., Snow, T. P., Friedman, S. D., Sonnentrucker, P., ...

[2]{ J. A. Thorburn, L. M. Hobbs, B. J. McCall, T. Oka, D. E. Welty, S. D. Friedman, T. P. Snow, P. Sonnentrucker, and D. G. York, {\em Astrophys. J.[3]{ G. H. Herbig, {\em Astrophys. J.[4]{ S. R....

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,...

# 2006. The American Astronomical Society. All rights reserved. Printed in U.S.A. THE 2.5 m TELESCOPE OF THE SLOAN DIGITAL SKY SURVEY (2005)

James E. Gunn, Walter A. Siegmund, Edward J. Mannery, Russell E. Owen, Charles L. Hull, R. French Leger, ...

We describe the design, construction, and performance of the Sloan Digital Sky Survey telescope located at Apache Point Observatory. The telescope is a modified two-corrector Ritchey-Chrétien design...

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...

Discovery of Two Gravitationally Lensed Quasars with Image Separations of 3 Arcseconds from the Sloan Digital Sky Survey (2004)

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'',...

Hubble Space Telescope Observations of Element Abundances in Low-redshift Damped Lyman-alpha Galaxies and Implications for the Global Metallicity-Redshift Relation (2004)

Kulkarni, Varsha P., Fall, S. Michael, Lauroesch, James T., York, Donald G., Welty, Daniel E., Khare, Pushpa, ...

Most models of cosmic chemical evolution predict that the mass-weighted mean interstellar metallicity of galaxies should rise with time from a low value $\sim 1/30$ solar at $z \sim 3$ to a nearly...

An Empirical Algorithm for Broad-band Photometric Redshifts of Quasars from the Sloan Digital Sky Survey (2004)

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...

Metals and Dust in Intermediate-redshift Damped Ly-alpha Galaxies (2004)

Khare, Pushpa, Kulkarni, Varsha P., Lauroesch, James T., York, Donald G., Crotts, Arlin P. S., Nakamura, Osamu

We report spectroscopic observations with the Multiple Mirror Telescope for 11 damped Lyman-alpha absorbers (DLAs) or strong DLA candidates at 0.1 < z < 1.5, including several absorbers discovered in...

The Clustering of AGN in the Sloan Digital Sky Survey (2004)

Wake, David A., Miller, Christopher J., Di Matteo, Tiziana, Nichol, Robert C., Pope, Adrian, Szalay, Alexander S., ...

We present the two--point correlation function (2PCF) of narrow-line active galactic nuclei (AGN) selected within the First Data Release of the Sloan Digital Sky Survey. Using a sample of 13605 AGN...

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...

Andromeda IX: A New Dwarf Spheroidal Satellite of M31 (2004)

Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martinez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...

We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). Using both SDSS and public archival...

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...

A Catalog of Spectroscopically Identified White Dwarf Stars in the First Data Release of the Sloan Digital Sky Survey (2004)

Kleinman, S. J., Harris, Hugh C., Eisenstein, Daniel J., Liebert, James, Nitta, Atsuko, Krzesiński, Jurek, ...

We present the full spectroscopic white dwarf and hot subdwarf sample from the SDSS first data release, DR1. We find 2551 white dwarf stars of various types, 240 hot subdwarf stars, and an additional...

Faint High-Latitude Carbon Stars Discovered by the Sloan Digital Sky Survey: An Initial Catalog (2004)

Downes, Ronald A., Margon, Bruce, Anderson, Scott F., Harris, Hugh C., Knapp, G. R., Schroeder, Josh, ...

A search of more than 3,000 square degrees of high latitude sky by the Sloan Digital Sky Survey has yielded 251 faint high-latitude carbon stars (FHLCs), the large majority previously uncataloged. We...

THE APACHE POINT DIFFUSE BANDS SURVEY: EMISSION FROM THE RED RECTANGLE (2004)

Snow, T. P., Rachford, B. L., Drosback, Meredith M., York, Donald G., Thorburn, J. A., Chapman, Sarah, ...

Author Institution: CASA - University of Colorado; Center for Astronomy \& Physics, University of Chicago; Department of Astronomy, University of California; Department of Astronomy, Space Telescope...

$CH^{+}$ AND CH EMISSION FROM THE RED RECTANGLE (2004)

Hobbs, L. M., Thorburn, J. A., York, Donald G., Oka, T., Snow, T. P., Barentine, John

$^{a}$ S. P. Balm and M. Jura, A\&A 261 L25 (1992) $^{b}$F. R. Ornellas and F. B. C. Machado, J. Chem. Phys. 84 1296 (1986) $^{c}$H. Sun and K. F. Freed, J. Chem. Phys. 88 2659 (1988)

Andromeda IX: A new dwarf spheroidal satellite of M31 (2004)

Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martínez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...

We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). Using both SDSS and public archival...

Sloan Digital Sky Survey Imaging of Low Galactic Latitude Fields: Technical Summary and Data Release (2004)

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...

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 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...

Blue horizontal branch stars in the Sloan Digital Sky Survey: I. Sample selection and structure in the Galactic halo (2003)

Sirko, Edwin, Goodman, Jeremy, Knapp, Gillian R., Brinkmann, Jon, Ivezic, Zeljko, Knerr, Edwin J., ...

We isolate samples of 733 bright (g < 18) and 437 faint (g > 18) high-Galactic latitude blue horizontal branch stars with photometry and spectroscopy in the Sloan Digital Sky Survey (SDSS)....

Blue horizontal branch stars in the Sloan Digital Sky Survey: II. Kinematics of the Galactic halo (2003)

Sirko, Edwin, Goodman, Jeremy, Knapp, Gillian R., Brinkmann, Jon, Ivezic, Zeljko, Knerr, Edwin J., ...

We carry out a maximum-likelihood kinematic analysis of a sample of 1170 blue horizontal branch (BHB) stars from the Sloan Digital Sky Survey presented in Sirko et al. (2003) (Paper I). Monte Carlo...

Sagittarius Tidal Debris 90 kpc from the Galactic Center (2003)

Newberg, Heidi Jo, Yanny, Brian, Grebel, Eva K., Hennessy, Greg, Ivezic, Zeljko, Martinez-Delgado, David, ...

A new overdensity of A-colored stars in distant parts of the Milky Way's stellar halo, at a dereddened SDSS magnitude of g_0 = 20.3, is presented. Identification of associated variable RR Lyrae...

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

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...

Angular Clustering with Photometric Redshifts in the Sloan Digital Sky Survey: Bimodality in the Clustering Properties of Galaxies (2003)

Budavari, Tamas, Connolly, Andrew J., Szalay, Alexander S., Szapudi, Istvan, Csabai, Istvan, Scranton, Ryan, ...

Understanding the clustering of galaxies has long been a goal of modern observational cosmology. Utilizing our photometric redshift technique a volume limited sample containing more than 2 million...

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...

A Large, Uniform Sample of X-ray Emitting AGN: Selection Approach and an Initial Catalog from the ROSAT All-Sky and Sloan Digital Sky Surveys (2003)

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...

SDSS J092455.87+021924.9: an Interesting Gravitationally Lensed Quasar from the Sloan Digital Sky Survey (2003)

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...

A Catalog of Broad Absorption Line Quasars from the Sloan Digital Sky Survey Early Data Release (2003)

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...

A Low Latitude Halo Stream around the Milky Way (2003)

Yanny, Brian, Newberg, Heidi Jo, Grebel, Eva K., Kent, Steve, Odenkirchen, Michael, Rockosi, Connie M., ...

We present evidence for a ring of stars in the plane of the Milky Way, extending at least from l = 180 deg to l = 227 deg with turnoff magnitude $g \sim 19.5$; the ring could encircle the Galaxy. We...

THE APACHE POINT ATLAS OF DIFFUSE INTERSTELLAR $BANDS^{a}$ (2003)

York, Donald G., Thorburn, J. A., Chapman, Sarah, Hobbs, L. M., Oka, T., Recchi, Benjamin C., ...

$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.

CORRELATIONS AMONG THE DIFFUSE INTERSTELLAR $BANDS^{a}$ (2003)

McCall, Benjamin J., Rachford, B. L., Snow, T. P., Friedman, S. D., Sonnentrucker, P., Thorburn, J. A., ...

$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.

DIFFUSE INTERSTELLAR BANDS CORRELATED WITH CARBON MOLECULES $C_{2}$ and $C_{3}$ (2003)

Thorburn, J. A., Hobbs, L. M., Oka, T., Welty, D. E., York, Donald G., McCall, Benjamin J., ...

$^{a}$J. A. Thorburn, L. M. Hobbs, B. J. McCall, T. Oka, D. E. Welty, S. D. Friedman, T. P. Snow, P. Sonnentrucker and D. G. York, ApJ 584, 339 (2003) $^{b}$T. Oka, J. A. Thorburn, B. J. McCall, S....

THE RELATIONSHIP OF MOLECULAR HYDROGEN, ATOMIC HYDROGEN, AND SELECTED DIFFUSE INTERSTELLAR $BANDS^{a}$ (2003)

York, Donald G., Thorburn, J. A., Hobbs, L. M., Oka, T., Welty, D. E., Snow, T. P., ...

$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.

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...

Sagittarius tidal debris 90 kiloparsecs from the galactic center (2003)

Newberg, Heidi Jo, Yanny, Brian, Grebel, Eva K., Hennessy, Greg, Ivezic, Z., Martinez-Delgado, David, ...

A new overdensity of A-colored stars in distant parts of the Milky Way's stellar halo, at a dereddened Sloan Digital Sky Survey magnitude of g0=20.3, is presented. Identification of associated...

The Sloan Digital Sky Survey: the cosmic spectrum and star formation history (2003)

Glazebrook, Karl, Baldry, Ivan K., Blanton, Michael R., Brinkmann, Jon, Connolly, Andrew J., Csabai, Istvan, ...

We present a determination of the "cosmic optical spectrum" of the universe, i.e., the ensemble emission from galaxies, as determined from the red-selected Sloan Digital Sky Survey main galaxy...

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 Sloan Digital Sky Survey: the cosmic spectrum and star formation history (2003)

Glazebrook, Karl, Baldry, Ivan K., Blanton, Michael R., Brinkmann, Jon, Connolly, Andrew J., Csabai, Istvan, ...

We present a determination of the "cosmic optical spectrum" of the universe, i.e., the ensemble emission from galaxies, as determined from the red-selected Sloan Digital Sky Survey main galaxy...

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 Sloan Digital Sky Survey: The Cosmic Spectrum and Star-Formation History (2002)

Glazebrook, Karl, Baldry, Ivan K., Blanton, Michael R., Brinkmann, Jon, Connolly, Andrew, Csabai, Istvan, ...

We present a determination of the `Cosmic Optical Spectrum' of the Universe, i.e. the ensemble emission from galaxies, as determined from the red-selected Sloan Digital Sky Survey main galaxy sample...

The overdensities of galaxy environments as a function of luminosity and color (2002)

Hogg, David W., Blanton, Michael R., Eisenstein, Daniel J., Gunn, James E., Schlegel, David J., Zehavi, Idit, ...

We study the mean environments of galaxies in the Sloan Digital Sky Survey as a function of rest-frame luminosity and color. Overdensities in galaxy number are estimated in $8 h^{-1} \mathrm{Mpc}$...

SDSS Survey for Resolved Milky Way Satellite Galaxies II: High-Velocity Clouds in the Early Data Release (2002)

Willman, Beth, Dalcanton, Julianne, Ivezic, Zeljko, Schneider, Donald P., York, Donald G.

In this paper, we limit the stellar content of 13 high-velocity clouds (HVCs; including 1 compact HVC) using the detection limits of a new survey for resolved Milky Way satellite galaxies in the...

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...

Two-Dimensional Topology of the Sloan Digital Sky Survey (2002)

Hoyle, Fiona, Vogeley, Michael S., Gott III, J. Richard, Blanton, Michael, Tegmark, Max, Weinberg, David H., ...

We present the topology of a volume-limited sample of 11,884 galaxies, selected from an apparent-magnitude limited sample of over 100,000 galaxies observed as part of the Sloan Digital Sky Survey...

The Cluster Mass Function from Early SDSS Data: Cosmological Implications (2002)

Bahcall, Neta A., Dong, Feng, Bode, Paul, Kim, Rita, Annis, James, McKay, Timothy A., ...

The mass function of clusters of galaxies is determined from 400 deg^2 of early commissioning imaging data of the Sloan Digital Sky Survey; ~300 clusters in the redshift range z = 0.1 - 0.2 are used....

A FUSE Survey of Interstellar Molecular Hydrogen in Translucent Clouds (2002)

Rachford, Brian L., Snow, Theodore P., Tumlinson, Jason, Shull, J. Michael, Blair, William P., Ferlet, Roger, ...

We report the first ensemble results from the FUSE survey of molecular hydrogen in lines of sight with A_V $\gtrsim$ 1 mag. We have developed techniques for fitting computed profiles to the low-J...

Dynamical Confirmation of SDSS Weak Lensing Scaling Laws (2002)

McKay, Timothy A., Sheldon, Erin Scott, Johnston, David, Grebel, Eva K., Prada, Francisco, Rix, Hans-Walter, ...

Galaxy masses can be estimated by a variety of methods; each applicable in different circumstances, and each suffering from different systematic uncertainties. Confirmation of results obtained by one...

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...

OBSERVATIONS OF INTERSTELLAR $C_{3}$ IN TRANSLUCENT SIGHTLINES (2002)

Oka, T., Thorburn, J. A., Hobbs, L. M., Welty, D. E., York, Donald G., McCall, Benjamin J., ...

$^{a}$J. P. Maier, N. M. Lakin, G. M. Walker and D. A. Bohlender Astrophys. J. 553, 267 2001 $^{b}$B. J. McCall et al., this meeting

PRELIMINARY RESULTS FROM THE APO DIFFUSE INTERSTELLAR BAND $SURVEY^{a}$ (2002)

McCall, Benjamin J., Rachford, B. L., Snow, T. P., Sonnentrucker, P., Friedman, S. D., Thorburn, J. A., ...

$^{a}$Based on observations from the APO 3.5-meter telescope, owned and operated by the Astrophysical Research Consortium.

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...

Optical and radio properties of extragalactic sources observed by the first survey and the Sloan Digital Sky Survey (2002)

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 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 Ghost of Sagittarius and Lumps in the Halo of the Milky Way (2001)

Newberg, Heidi Jo, Yanny, Brian, Rockosi, Constance M., Grebel, Eva K., Rix, Hans-Walter, Brinkmann, Jon, ...

We identify new structures in the halo of the Milky Way Galaxy from positions, colors and magnitudes of five million stars detected in the Sloan Digital Sky Survey. Most of these stars are within...

L Dwarfs Found in Sloan Digital Sky Survey Commissioning Data II. Hobby-Eberly Telescope Observations (2001)

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...

Detecting Clusters of Galaxies in the Sloan Digital Sky Survey I : Monte Carlo Comparison of Cluster Detection Algorithms (2001)

Kim, Rita S. J., Kepner, Jeremy V., Postman, Marc, Strauss, Michael A., Bahcall, Neta A., Gunn, James E., ...

We present a comparison of three cluster finding algorithms from imaging data using Monte Carlo simulations of clusters embedded in a 25 deg^2 region of Sloan Digital Sky Survey (SDSS) imaging data:...

A FUSE Survey of Interstellar Molecular Hydrogen in the Small and Large Magellanic Clouds (2001)

Tumlinson, Jason, Shull, J. Michael, Rachford, Brian L., Browning, Matthew K., Snow, Theodore P., Fullerton, Alex W., ...

We describe a moderate-resolution FUSE survey of H2 along 70 sight lines to the Small and Large Magellanic Clouds, using hot stars as background sources. FUSE spectra of 67% of observed Magellanic...

Galaxy Mass and Luminosity Scaling Laws Determined by Weak Gravitational Lensing (2001)

McKay, Timothy A., Sheldon, Erin Scott, Racusin, Judith, Fischer, Philippe, Seljak, Uros, Stebbins, Albert, ...

We present new measurements of scaling laws relating the luminosity of galaxies to the amplitude and shape of their dark matter halos. Early imaging and spectroscopic data from the Sloan Digital Sky...

FUSE Observations of Molecular Hydrogen in Translucent Interstellar Clouds: II. The Line of Sight Toward HD 110432 (2001)

Rachford, Brian L., Snow, Theodore P., Tumlinson, Jason, Shull, J. Michael, Roueff, E., Andre, M., ...

We report the second study from the FUSE survey of molecular hydrogen in translucent clouds, for the line of sight toward HD 110432. This star lies beyond the Coalsack dark nebula, and with E(B-V) =...

Weak Lensing Measurements of 42 SDSS/RASS Galaxy Clusters (2001)

Sheldon, Erin Scott, Annis, James, Bohringer, Hans, Fischer, Philippe, Frieman, Joshua A., Joffre, Michael, ...

We present a lensing study of 42 galaxy clusters imaged in Sloan Digital Sky Survey (SDSS) commissioning data. Cluster candidates are selected optically from SDSS imaging data and confirmed for this...

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...

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...

IS $C^{-}_{7}$ REALLY A DIFFUSE INTERSTELLAR BAND CARRIER? (2001)

McCall, Benjamin J., York, Donald G., Oka, T.

$^{a}$Supported by the Fannie and John Hertz Foundation $^{b}$M. Tulej, D. A. Kirkwood, M. Pachkov, \& J. P. Maier, Astrophysical Journal Letters 506, L69 (1998) $^{c}$B. J. McCall, D. G. York, \& T....

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...

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...

Far Ultraviolet Spectroscopic Explorer Observations of the Supernova Remnant N49 in the Large Magellanic Cloud (2000)

Blair, William P., Sankrit, Ravi, Shelton, Robin, Sembach, Kenneth R., Moos, H. Warren, Raymond, John C., ...

We report a Far Ultraviolet Spectroscopic Explorer satellite observation of the supernova remnant N49 in the Large Magellanic Cloud, covering the 905 -- 1187 A spectral region. A 30'' square aperture...

Determining the Fraction of Intrinsic CIV Absorption in Quasi-Stellar Object Absorption Line Systems (1999)

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...

$C^{-}_{7}$ AND THE DIFFUSE INTERSTELLAR BANDS (1999)

McCall, Benjamin J., York, Donald G., Oka, T.

$^{a}$ Supported by the Fannie and John Hertz Foundation $^{b}$ A.E. Douglas, Nature 269, 130, (1977). W.H. Smith, T.P. Snow, and D.G. York, Astrophys. J. 218, 124 (1977) $^{c}$ M. Tulej, D.A....

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...

High-Redshift Superclustering of QSO Absorption Line Systems on 100 Mpc Scales (1996)

Quashnock, Jean M., Berk, Daniel E. Vanden, York, Donald G.

We have analyzed the clustering of C IV absorption line systems in an extensive new catalog of heavy element QSO absorbers. The catalog permits exploration of clustering over a large range in both...

An Excess of C IV Absorbers in Luminous QSOs: Evidence for Gravitational Lensing? (1996)

Berk, Daniel E. Vanden, Quashnock, Jean M., York, Donald G., Yanny, Brian

We have compiled a new and extensive catalog of heavy-element QSO absorption line systems and analyzed the distribution of absorbers in bright and faint QSOs, to search for gravitational lensing of...