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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…
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…
Additional Ultracool White Dwarfs Found in the Sloan Digital Sky Survey
H. C. Harris, E. Gates, G. Gyuk +12
We identify seven new ultracool white dwarfs discovered in the Sloan Digital Sky Survey (SDSS). The SDSS photometry, spectra, and proper motions are presented, and additional BVRI…
First-Year Spectroscopy for the SDSS-II Supernova Survey
Chen Zheng, Roger W. Romani, Masao Sako +77
This paper presents spectroscopy of supernovae discovered in the first season of the Sloan Digital Sky Survey-II Supernova Survey. This program searches for and measures multi-band…
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 SEGUE Stellar Parameter Pipeline. II. Validation with Galactic Globular and Open Clusters
Y. S. Lee, T. C. Beers, T. Sivarani +13
We validate the performance and accuracy of the current SEGUE (Sloan Extension for Galactic Understanding and Exploration) Stellar Parameter Pipeline (SSPP), which determines stell…
The Sloan Digital Sky Survey-II Supernova Survey: Search Algorithm and Follow-up Observations
Masao Sako, B. Bassett, A. Becker +47
The Sloan Digital Sky Survey-II Supernova Survey has identified a large number of new transient sources in a 300 sq. deg. region along the celestial equator during its first two se…
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…
The Hercules-Aquila Cloud
V. Belokurov, N. W. Evans, E. F. Bell +23
We present evidence for a substantial overdensity of stars in the direction of the constellations of Hercules and Aquila. The Cloud is centered at a Galactic longitude of about 40…
Cloud Structure and Physical Conditions in Star-Forming Regions from Optical Observations. II. Analysis
K. Pan, S. R. Federman, Y. Sheffer +1
To complement the optical absorption-line survey of diffuse molecular gas in Paper I, we obtained and analyzed far ultraviolet H and CO data on lines of sight toward stars in C…
Cloud Structure and Physical Conditions in Star-forming Regions from Optical Observations. I. Data and Component Structure
K. Pan, S. R. Federman, K. Cunha +2
We present high-resolution optical spectra (at ~0.6--1.8 km s-1) of interstellar CN, CH, CH^+, \ion{Ca}{1}, \ion{K}{1}, and \ion{Ca}{2} absorption toward 29 lines of sight in three…
Small scale structure in molecular gas from multi-epoch observations of HD 34078
E. Rollinde, P. Boisse, S. R. Federman +1
We present spectroscopic observations of the runaway reddened star HD 34078 acquired during the last three years at Observatoire de Haute Provence and McDonald Observatory as well…
Density Variations over Subparsec Scales in Diffuse Molecular Gas
K. Pan, S. R. Federman, D. E. Welty
We present high-resolution observations of interstellar CN, CH, CH^{+}, \ion{Ca}{1}, and \ion{Ca}{2} absorption lines toward the multiple star systems HD206267 and HD217035. Substa…
Physical Conditions in the Foreground Gas of Reflection Nebulae: NGC 2023, vdB 102, and NGC 7023
David C. Knauth, S. R. Federman, K. Pan +2
High resolution optical spectra of HD 37903 and HD 147009, which illuminate the reflection nebulae, NGC 2023 and vdB 102, were obtained for comparison with our results for HD 20077…