MISCELLANEOUS: <i>Buried Cities.</i> Jennie Hall

Reichard, Gladys A.

doi:10.1525/aa.1923.25.2.02a00170

Cited by 2 publications

(4 citation statements)

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“…The EDR BAL catalog, based on the material in Paper I, is presented by Reichard et al (2003a); approximately 6% of the EDR quasars are BALs. At redshifts where BALs can be selected from the SDSS, the raw BAL fraction is 15% (Tolea et al 2002) and the fraction after accounting for color-dependent selection effects is 13.4±1.2% (Reichard et al 2003b). After including incompleteness corrections, the true fraction of BALs in the quasar population has been measured as 22±4% in the LBQS (Hewett & Foltz 2003) and estimated as 15.9±1.4% in the SDSS (Reichard et al 2003b).…”

Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

“…At redshifts where BALs can be selected from the SDSS, the raw BAL fraction is 15% (Tolea et al 2002) and the fraction after accounting for color-dependent selection effects is 13.4±1.2% (Reichard et al 2003b). After including incompleteness corrections, the true fraction of BALs in the quasar population has been measured as 22±4% in the LBQS (Hewett & Foltz 2003) and estimated as 15.9±1.4% in the SDSS (Reichard et al 2003b). An investigation of the properties of the Paper I BALs is also given in Reichard et al (2003b).…”

Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

“…After including incompleteness corrections, the true fraction of BALs in the quasar population has been measured as 22±4% in the LBQS (Hewett & Foltz 2003) and estimated as 15.9±1.4% in the SDSS (Reichard et al 2003b). An investigation of the properties of the Paper I BALs is also given in Reichard et al (2003b). Finally, the SDSS has also demonstrated that it can identify an appreciable number of "extreme BALs"; 18 of the 23 ususual BALs presented in Hall et al (2002a) are in the DR1 catalog.…”

Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

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The Sloan Digital Sky Survey Quasar Catalog. II. First Data Release

Schneider¹,

Fan²,

Hall³

et al. 2003

Astron J

166

100

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We present the second edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog. The catalog consists of the 16,713 objects in the SDSS First Data Release that have luminosities larger than M i = −22 (in a cosmology with H 0 = 70 km s −1 Mpc −1 , Ω M = 0.3, and Ω Λ = 0.7), have at least one emission line with FWHM larger than 1000 km s −1 , and have highly reliable redshifts. The area covered by the catalog is ≈ 1360 deg 2 . The quasar redshifts range from 0.08 to 5.41, with a median value of 1.43. For each object the catalog presents positions accurate to better than 0.2 ′′ rms per coordinate, five-band (ugriz) CCD-based photometry with typical accuracy of 0.03 mag, and information on the morphology and selection method. The catalog also contains some radio, near-infrared, and X-ray emission properties of the quasars, when available, from other large area surveys. Calibrated digital spectra of all objects in the catalog, covering the wavelength region 3800-9200Å at a spectral resolution of 1800-2100, are available. This publication supersedes the first SDSS Quasar Catalog, which was based on material from the SDSS Early Data Release. A summary of corrections to current quasar databases is also provided.The majority of the objects were found in SDSS commissioning data using a multicolor selection technique. Since the quasar selection algorithm was undergoing testing during the entire observational period covered by this catalog, care must be taken when assembling samples from the catalog for use in statistical studies. A total of 15,786 objects (94%) in the catalog were discovered by the SDSS; 12,173 of the SDSS discoveries are reported here for the first time. Included in the new discoveries are five quasars brighter than i = 16.0 and 17 quasars with redshifts larger than 4.5.

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Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

Section: Broad Absorption Line Quasarsmentioning

confidence: 99%

See 1 more Smart Citation

The Sloan Digital Sky Survey Quasar Catalog. II. First Data Release

Schneider¹,

Fan²,

Hall³

et al. 2003

Astron J

166

100

View full text Add to dashboard Cite

show abstract

“…Broad (velocity width FWHM > 2000 km s −1 ) troughs (BALs) are detected in roughly 15% of optically selected quasars (Hewett & Foltz 2003, Reichard et al 2003b. They are blueshifted with respect to the QSO emission lines.…”

Section: Introductionmentioning

confidence: 99%

VLT + UVES spectroscopy of the low-ionization intrinsic absorber in SDSS J001130.56+005550.7

Hutsemékers

Hall

Brinkmann³

2004

A&A

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Using Eq. (4) and the numerical values quoted in Sect. 4.2 of the Paper, which are all correct, the derived distance r should read 4 kpc ≤ r ≤ 16 kpc instead of 9 kpc ≤ r ≤ 37 kpc, i.e. roughly a factor 2 smaller. Accordingly, the distance quoted in Sect. 5 and in the Abstract should read r 10 kpc instead of r 20 kpc. This error does not affect any of the conclusions of the Paper. We thank John Everett for bringing this error to our attention.Article published by EDP Sciences and available at

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MISCELLANEOUS: Buried Cities. Jennie Hall

Cited by 2 publications

References 0 publications

The Sloan Digital Sky Survey Quasar Catalog. II. First Data Release

The Sloan Digital Sky Survey Quasar Catalog. II. First Data Release

VLT + UVES spectroscopy of the low-ionization intrinsic absorber in SDSS J001130.56+005550.7

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