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The Seventh Data Release of the Sloan Digital Sky Survey
K. Abazajian
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 SDS…
Lessons Learned from Sloan Digital Sky Survey Operations
S. J. Kleinman, J. E. Gunn, B. Boroski +12
Astronomy is changing. Large projects, large collaborations, and large budgets are becoming the norm. The Sloan Digital Sky Survey (SDSS) is one example of this new astronomy, and…
A Catalog of Broad Absorption Line Quasars in Sloan Digital Sky Survey Data Release 5
Robert R. Gibson, Linhua Jiang, W. N. Brandt +9
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 coverin…
Mass models and environment of the new quadruply lensed quasar SDSS J1330+1810
Masamune Oguri, Naohisa Inada, Jeffrey A. Blackburne +5
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 Sl…
Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release Six
Gordon T. Richards, Adam D. Myers, Alexander G. Gray +6
We present a catalog of 1,172,157 quasar candidates selected from the photometric imaging data of the Sloan Digital Sky Survey (SDSS). The objects are all point sources to a limiti…
A High Yield of New Sightlines for the Study of Intergalactic Helium: Far-UV-Bright Quasars from SDSS, GALEX, and HST
David Syphers, Scott F. Anderson, Wei Zheng +6
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 cr…
Five New High-Redshift Quasar Lenses from the Sloan Digital Sky Survey
Naohisa Inada, Masamune Oguri, Min-Su Shin +7
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…
Galactic Globular and Open Clusters in the Sloan Digital Sky Survey. I. Crowded Field Photometry and Cluster Fiducial Sequences in ugriz
Deokkeun An, Jennifer A. Johnson, James L. Clem +22
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…
A Survey of Metal Lines at High-redshift (II) : SDSS Absorption Line Studies - OVI line density, space density and gas metallicity at z_abs ~ 3.0
S. Frank, S. Mathur, M. Pieri +1
We have analysed a large data set of OVI absorber candidates found in the spectra of 3702 SDSS quasars, focusing on a subsample of 387 AGN sightlines with an average S/N>5.0, allow…
The Milky Way Tomography with SDSS: II. Stellar Metallicity
Zeljko Ivezic, Branimir Sesar, Mario Juric +50
Using effective temperature and metallicity derived from SDSS spectra for ~60,000 F and G type main sequence stars (0.2<g-r<0.6), we develop polynomial models for estimating these…
A Catalog of Diffuse Interstellar Bands in the Spectrum of HD 204827
L. M. Hobbs, D. G. York, T. P. Snow +8
Echelle spectra of the double-lined spectroscopic binary HD 204827 were obtained on five nights, at a resolving power R = 38,000 and with a S/N ratio = 750 near 6000 A in the final…
A Large Sample of BL Lacs from SDSS and FIRST
Richard M. Plotkin, Scott F. Anderson, Patrick B. Hall +5
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…
Narrow associated QSO absorbers: clustering, outflows and the line-of-sight proximity effect
Vivienne Wild, Guinevere Kauffmann, Simon White +8
Using data from the Sloan Digital Sky Survey data release 3 (SDSS DR3) we investigate how narrow (<700km/s) CIV and MgII quasar absorption line systems are distributed around quasa…
Two More Candidate AM Canum Venaticorum (AM CVn) Binaries from the Sloan Digital Sky Survey
S. F. Anderson, A. C. Becker, D. Haggard +18
AM CVn systems are a select group of ultracompact binaries with the shortest orbital periods of any known binary subclass; mass-transfer is likely from a low-mass (partially-)degen…
An extremely luminous X-ray outburst at the birth of a supernova
A. M. Soderberg, E. Berger, K. L. Page +40
Massive stars end their short lives in spectacular explosions, supernovae, that synthesize new elements and drive galaxy evolution. Throughout history supernovae were discovered ch…
Average Properties of a Large Sample of z_abs ~ z_em associated Mg II Absorption Line Systems
D. Vanden Berk, P. Khare, D. G. York +16
We have studied a sample of 415 associated (z_ab z_em; relative velocity with respect to QSO <3000km/s) Mg II absorption systems with 1.0<=z_ab<=1.86, in the spectra of SDSS DR3 QS…
A Measurement of the Rate of type-Ia Supernovae at Redshift 0.1 from the First Season of the SDSS-II Supernova Survey
Benjamin Dilday, R. Kessler, J. A. Frieman +50
We present a measurement of the rate of type Ia supernovae (SNe Ia) from the first of three seasons of data from the SDSS-II Supernova Survey. For this measurement, we include 17 S…
The chemical compositions of 10 new sub-DLAs and strong Lyman-limit systems at z < 1.5
Joseph D. Meiring, Varsha P. Kulkarni, James T. Lauroesch +4
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 MI…
Distances to Galactic high-velocity clouds. Complex C
B. P. Wakker, D. G. York, J. C. Howk +8
We report the first determination of a distance bracket for the high-velocity cloud (HVC) complex C. Combined with previous measurements showing that this cloud has a metallicity o…
Quasar Clustering at $25\kpch$ from a Complete Sample of Binaries
Adam D. Myers, Gordon T. Richards, Robert J. Brunner +5
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…
Distances to Galactic high-velocity clouds. I. Cohen Stream, complex GCP, cloud g1
B. P. Wakker, D. G. York, R. Wilhelm +5
The high- and intermediate-velocity interstellar clouds (HVCs/IVCs) are tracers of energetic processes in and around the Milky Way. Clouds with near-solar metallicity about one kpc…
The Sloan Digital Sky Survey Quasar Lens Search. II. Statistical Lens Sample from the Third Data Release
Naohisa Inada, Masamune Oguri, Robert H. Becker +31
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…
The Sloan Digital Sky Survey Quasar Lens Search. III. Constraints on Dark Energy from the Third Data Release Quasar Lens Catalog
Masamune Oguri, Naohisa Inada, Michael A. Strauss +31
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,…
A New Quadruply Lensed Quasar: SDSSJ125107.57+293540.5
Issha Kayo, Naohisa Inada, Masamune Oguri +6
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 fou…