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Large Scale Clustering of Sloan Digital Sky Survey Quasars: Impact of the Baryon Density and the Cosmological Constant
Kazuhiro Yahata, Yasushi Suto, Issha Kayo +13
We report the first result of the clustering analysis of Sloan Digital Sky Survey (SDSS) quasars. We compute the two-point correlation function (2PCF) of SDSS quasars in redshift s…
XMM-Newton and optical follow-up observations of three new polars from the Sloan Digital Sky Survey
Lee Homer, Paula Szkody, Bing Chen +7
We report follow-up XMM-Newton and optical observations of three new polars found in the Sloan Digital Sky Survey. Simple modeling of the X-ray spectra, and consideration of the de…
XMM-Newton Observations of the Extremely Low Accretion Rate Polars SDSSJ15531.12+551614.5 and SDSSJ132411.57+032050.5
Paula Szkody, Lee Homer, Bing Chen +6
XMM-Newton observations of the polar SDSSJ155331.12+551614.5 reveal that all the X-ray flux emerges at energies less than 2 keV. The best fit to the spectrum is with a thermal plas…
Spectral Classification of Quasars in the Sloan Digital Sky Survey: Eigenspectra; Redshift and Luminosity Effects
C. W. Yip, A. J. Connolly, D. E. Vanden Berk +10
We study 16,707 quasar spectra from the SDSS using the Karhunen-Loève (KL) transform (or Principal Component Analysis, PCA). The quasar eigenspectra of the full catalog reveal the…
An Empirical Algorithm for Broad-band Photometric Redshifts of Quasars from the Sloan Digital Sky Survey
Michael A. Weinstein, Gordon T. Richards, Donald P. Schneider +7
We present an empirical algorithm for obtaining photometric redshifts of quasars using 5-band Sloan Digital Sky Survey (SDSS) photometry. Our algorithm generates an empirical model…
Distributions of Galaxy Spectral Types in the Sloan Digital Sky Survey
Ching-Wa Yip, Andrew Connolly, Alex Szalay +12
We perform an objective classification of 170,000 galaxy spectra in the Sloan Digital Sky Survey (SDSS) using the Karhunen-Loève (KL) transform. With about one-sixth of the total s…