/ftp/cats/VII/279



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VII/279          SDSS quasar catalog: twelfth data release   (Paris+, 2017)
The following files can be converted to FITS (extension .fit or fit.gz)
	dr12q.dat dr12qbal.dat dr12qsp.dat dr12qspb.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VII/279
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drwxr-xr-x 257 cats archive 8192 Feb 8 10:28 [Up] drwxr-xr-x 3 cats archive 4096 Mar 17 2023 [TAR file] -rw-r--r-- 1 cats archive 494 Dec 19 2022 .message -r--r--r-- 1 cats archive 157489268 Jun 28 2017 DR12Q.fits.gz [Uncompressed] -r--r--r-- 1 cats archive 8667861 Jun 28 2017 DR12Q_BAL.fits.gz [Uncompressed] -r--r--r-- 1 cats archive 748409 Jun 28 2017 DR12Q_sup.fits.gz [Uncompressed] -r--r--r-- 1 cats archive 92160 Jun 28 2017 DR12Q_supbad.fits -r--r--r-- 1 cats archive 49747 Mar 17 2023 ReadMe -rw-r--r-- 1 cats archive 2124 Feb 1 2019 +footg5.gif -rw-r--r-- 1 cats archive 20582 Feb 1 2019 +footg8.gif -r--r--r-- 1 cats archive 133319951 Jul 11 2017 dr12q.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 8263553 Jul 11 2017 dr12qbal.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 805374 Jul 11 2017 dr12qsp.dat.gz [txt] [txt.gz] [fits] [fits.gz] [html] -r--r--r-- 1 cats archive 107802 Jul 11 2017 dr12qspb.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe : VII/279 SDSS quasar catalog: twelfth data release (Paris+, 2017) ================================================================================ The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release. Paris I., Petitjean P., Ross N.P., Myers A.D., Aubourg E., Streblyanska A., Bailey S., Armengaud E., Palanque-Delabrouille N., Yeche C., Hamann F., Strauss M.A., Albareti F.D., Bovy J., Bizyaev D., Brandt W.N., Brusa M., Buchner J., Comparat J., Croft R.A.C., Dwelly T., Fan X., Font-Ribera A., Ge J., Georgakakis A., Hall P.B., Jiang L., Kinemuchi K., Malanushenko E., Malanushenko V., Mcmahon R.G., Menzel M.-L., Merloni A., Nandra K., Noterdaeme P., Oravetz D., Pan K., Pieri M.M., Prada F., Salvato M., Schlegel D.J., Schneider D.P., Simmons A., Viel M., Weinberg D.H., Zhu L. <Astron. Astrophys., 597, A79 (2017)> =2017A&A...597A..79P (SIMBAD/NED BibCode) =2017yCat.7278....0P =2017yCat.7279....0P ================================================================================ ADC_Keywords: Surveys ; QSOs ; Active gal. nuclei ; Spectroscopy Keywords: catalogs - surveys - quasars: general Abstract: We present the Data Release 12 Quasar catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky SurveyIII. This catalog includes all SDSS-III/BOSS objects that were spectroscopically targeted as quasar candidates during the full survey and that are confirmed as quasars via visual inspection of the spectra, have luminosities M_i_[z=2]< -20.5 (in a LambdaCDM cosmology with H_0_=70km/s/Mpc, Omega_M_=0.3, and Omega_Lambda_=0.7), and either display at least one emission line with a full width at half maximum (FWHM) larger than 500km/s or, if not, have interesting/complex absorption features. The catalog also includes previously known quasars (mostly from SDSS-I andII) that were reobserved by BOSS. The catalog contains 297 301 quasars (272 026 are new discoveries since the beginning of SDSS-III) detected over 9376deg^2^ with robust identification and redshift measured by a combination of principal component eigenspectra. The number of quasars with z>2.15 (184 101, of which 167 742 are new discoveries) is about an order of magnitude greater than the number of z>2.15 quasars known prior to BOSS. Redshifts and FWHMs are provided for the strongest emission lines (CIV, CIII], MgII). The catalog identifies 29 580 broad absorption line quasars and lists their characteristics. For each object, the catalog presents five-band (u, g, r, i, z) CCD-based photometry with typical accuracy of 0.03mag together with some information on the optical morphology and the selection criteria. When available, the catalog also provides information on the optical variability of quasars using SDSS and Palomar Transient Factory multi-epoch photometry. The catalog also contains X-ray, ultraviolet, near-infrared, and radio emission properties of the quasars, when available, from other large-area surveys. The calibrated digital spectra, covering the wavelength region 3600-10 500AA at a spectral resolution in the range 1300<R<2500, can be retrieved from the SDSS Catalog Archive Server. We also provide a supplemental list of an additional 4841 quasars that have been identified serendipitously outside of the superset defined to derive the main quasar catalog. Description: We present the final quasar catalog of the SDSS-III/BOSS survey resulting from five years of observations. The catalog, which we call "DR12Q", contains 297301 quasars, 184101 of which have z>2.15. We provide robust identification from visual inspection and refined redshift measurements based on the result of a principal component analysis of the spectra. The present catalog contains about 80% more quasars than our previous release (Paris et al., 2014, Cat. VII/270). As part of DR12Q, we also provide a catalog of 29580 BAL quasars and their properties. Spectroscopic line measurements are provided together with multi-wavelength matching with GALEX, 2MASS, UKIDSS, WISE, FIRST, RASS and XMM-Newton observations.