Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 969

The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.

THE SLOAN DIGITAL SKY SURVEY QUASAR CATALOG. V. SEVENTH DATA RELEASE

Open access
Schneider, Donald P., Richards, Gordon T., Hall, Patrick B., Strauss, Michael A., Anderson, Scott F., Boroson, Todd A., Ross, Nicholas P., Shen, Yue, Brandt, W. N., Fan, Xiaohui, Inada, Naohisa, Jester, Sebastian, Knapp, G. R., Krawczyk, Coleman M., Thakar, Anirudda R., Berk, Daniel E. Vanden, Voges, Wolfgang, Yanny, Brian, York, Donald G., Bahcall, Neta A., Bizyaev, Dmitry, Blanton, Michael R., Brewington, Howard, Brinkmann, J., Eisenstein, Daniel, Frieman, Joshua A., Fukugita, Masataka, Gray, Jim, Gunn, James E., Hibon, Pascale, Ivezić, Željko, Kent, Stephen M., Kron, Richard G., Lee, Myung Gyoon, Lupton, Robert H., Malanushenko, Elena, Malanushenko, Viktor, Oravetz, Dan, Pan, K., Pier, Jeffrey R., Price, Ted N., Saxe, David H., Schlegel, David J., Simmons, Audry, Snedden, Stephanie A., SubbaRao, Mark U., Szalay, Alexander S., Weinberg, David H.·2010·The Astronomical Journal

Abstract

We present the fifth edition of the Sloan Digital Sky Survey (SDSS) Quasar Catalog, which is based upon the SDSS Seventh Data Release. The catalog, which contains 105,783 spectroscopically confirmed quasars, represents the conclusion of the SDSS-I and SDSS-II quasar survey. The catalog consists of the SDSS objects that have luminosities larger than M i = −22.0 (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 or have interesting/complex absorption features, are fainter than i ≈ 15.0, and have highly reliable redshifts. The catalog covers an area of ≈9380 deg 2 . The quasar redshifts range from 0.065 to 5.46, with a median value of 1.49; the catalog includes 1248 quasars at redshifts greater than 4, of which 56 are at redshifts greater than 5. The catalog contains 9210 quasars with i < 18; slightly over half of the entries have i < 19. For each object the catalog presents positions accurate to better than 0 1 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 radio, near-infrared, and X-ray emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra cover the wavelength region 3800–9200 Å at a spectral resolution of ≃ 2000; the spectra can be retrieved from the SDSS public database using the information provided in the catalog. Over 96% of the objects in the catalog were discovered by the SDSS. We also include a supplemental list of an additional 207 quasars with SDSS spectra whose archive photometric information is incomplete.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1088/0004-6256/139/6/2360

Cites

8 of 8 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 8 references

Cited by

See all 969

Metadata

Authors
Schneider, D. P., Richards, G. T., Hall, P. B., Strauss, M. A., Anderson, S. F., Boroson, T. A., Ross, N. P., Shen, Y., Brandt, W. N., Fan, X., Inada, N., Jester, S., Knapp, G. R., Krawczyk, C. M., Thakar, A. R., Berk, D. E. V., Voges, W., Yanny, B., York, D. G., Bahcall, N. A., Bizyaev, D., Blanton, M. R., Brewington, H., Brinkmann, J., Eisenstein, D., Frieman, J. A., Fukugita, M., Gray, J., Gunn, J. E., Hibon, P., Ivezić, Ž., Kent, S. M., Kron, R. G., Lee, M. G., Lupton, R. H., Malanushenko, E., Malanushenko, V., Oravetz, D., Pan, K., Pier, J. R., Price, T. N., Saxe, D. H., Schlegel, D. J., Simmons, A., Snedden, S. A., SubbaRao, M. U., Szalay, A. S., & Weinberg, D. H.
Venue
The Astronomical Journal
Published
2010-04-27
Volume
139
Issue
6
Pages
2360-2373
ISSN
  • 0004-6256 (ISSN-L)
  • 1538-3881
OpenAlex
W1983961944
Cited by
969
References
8
FWCI
51.42
Type
journal article
Language
en
Open access
bronze

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: THE SLOAN DIGITAL SKY SURVEY QUASAR CATALOG. V. SEVENTH DATA RELEASE. https://app.cochat.ai/papers/10.1088/0004-6256/139/6/2360
The paper
Schneider, D. P., Richards, G. T., Hall, P. B., Strauss, M. A., Anderson, S. F., Boroson, T. A., Ross, N. P., Shen, Y., Brandt, W. N., Fan, X., Inada, N., Jester, S., Knapp, G. R., Krawczyk, C. M., Thakar, A. R., Berk, D. E. V., Voges, W., Yanny, B., York, D. G., . . . Weinberg, D. H. (2010). THE SLOAN DIGITAL SKY SURVEY QUASAR CATALOG. V. SEVENTH DATA RELEASE. The Astronomical Journal. https://doi.org/10.1088/0004-6256/139/6/2360

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.