The Seventh Data Release of the Sloan Digital Sky Survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
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 SDSS-II. It includes...
Neyrinck, Mark C., Szapudi, István, Szalay, Alexander S.
We find that nonlinearities in the dark-matter power spectrum are dramatically smaller if the density field first undergoes a logarithmic mapping. In the Millennium simulation, this procedure...
A Map of the Integrated Sachs-Wolfe Signal from Luminous Red Galaxies (2008)
Granett, Benjamin R., Neyrinck, Mark C., Szapudi, István
We construct a map of the derivative of the gravitational potential traced by SDSS Luminous Red Galaxies. The potential decays on large scales due to cosmic acceleration, leaving an imprint on...
Granett, Benjamin R., Neyrinck, Mark C., Szapudi, István
We measure hot and cold spots on the microwave background associated with supercluster and supervoid structures identified in the Sloan Digital Sky Survey Luminous Red Galaxy catalog. The structures...
Dark Energy Detected with Supervoids and Superclusters (2008)
Granett, Benjamin R., Neyrinck, Mark C., Szapudi, István
The observed apparent acceleration of the universe is usually attributed to negative pressure from a mysterious dark energy. This acceleration causes the gravitational potential to decay, heating or...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Prieto, Carlos Allende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the sloan digital sky survey (2008)
Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...
Experimental Cosmic Statistics I: Variance (2007)
Stéphane Colombi, István Szapudi, Adrian Jenkins, Jörg Colberg
Counts-in-cells are measured in the CDM Virgo Hubble Volume simulation. This large N-body experiment has 10 9 particles in a cubic box of size 2000 h \Gamma1 Mpc. The unprecedented combination of...
Experimental Cosmic Statistics II: Distribution (2007)
István Szapudi, Stéphane Colombi, Adrian Jenkins, Jörg Colberg
Colombi et al. 1999 (paper I) investigated the counts-in-cells statistics and their respective errors in the CDM Virgo Hubble Volume simulation. This extremely large N-body experiment also allows a...
Shrinkage Estimation of the Power Spectrum Covariance Matrix (2007)
Pope, Adrian C., Szapudi, István
We seek to improve estimates of the power spectrum covariance matrix from a limited number of simulations by employing a novel statistical technique known as shrinkage estimation. The shrinkage...
Baryon oscillations in galaxy and matter power-spectrum covariance matrices (2007)
Neyrinck, Mark C., Szapudi, István
We investigate large-amplitude baryon acoustic oscillations (BAO's) in off-diagonal entries of cosmological power-spectrum covariance matrices. These covariance-matrix BAO's describe the increased...
The fifth data release of the sloan digital sky survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
Cosmological constraints from the SDSS luminous red galaxies (2006)
Tegmark, Max, Eisenstein, Daniel J., Strauss, Michael A., Weinberg, David H., Blanton, Michael R., Frieman, Joshua A., ...
We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological...
Neyrinck, Mark C., Szapudi, István
We investigate the cosmological Fisher information in the non-linear dark-matter power spectrum in the context of the halo model. We find that there is a plateau in information content on translinear...
Information content in the halo-model dark-matter power spectrum (2006)
Neyrinck, Mark C., Szapudi, István, Rimes, Christopher D.
Using the halo model, we investigate the cosmological Fisher information in the non-linear dark-matter power spectrum about the initial amplitude of linear power. We find that there is little...
GALICS – V: Low- and high-order clustering in mock sloan digital sky surveys (2006)
Blaizot, Jérémy, Szapudi, István, Colombi, Stéphane, Budavàri, Tamás, Bouchet, François R., Devriendt, Julien E. G., ...
Fast Edge Corrected Measurement of the Two-Point Correlation Function and the Power Spectrum (2005)
Szapudi, István, Pan, Jun, Prunet, Simon, Budavári, Tamás
We present two related techniques to measure the two-point correlation function and the power spectrum with edge correction in any spatial dimensions. The underlying algorithm uses fast Fourier...
Introduction to Higher Order Spatial Statistics in Cosmology (2005)
In this lecture notes I concentrate on the classic and widely applicable characterization of higher order statistics by joint moments, a.k.a. higher order correlation functions, and directly related...
The third data release of the sloan digital sky survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Third Data Release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
Higher Order Moments of the Angular Distribution of Galaxies from Early SDSS Data (2001)
Szapudi, István, Frieman, Joshua A., Scoccimarro, Roman, Szalay, Alexander S., Connolly, Andrew J., Dodelson, Scott, ...
We present initial results for counts in cells statistics of the angular distribution of galaxies in early data from the Sloan Digital Sky Survey (SDSS). We analyze a rectangular stripe $2.5^\circ$...
The 3D Power Spectrum from Angular Clustering of Galaxies in Early SDSS Data (2001)
Dodelson, Scott, Narayanan, Vijay K., Tegmark, Max, Scranton, Ryan, Budavari, Tamas, Connolly, Andrew, ...
Early photometric data from the Sloan Digital Sky Survey (SDSS) contain angular positions for 1.5 million galaxies. In companion papers, the angular correlation function $w(\theta)$ and 2D power...
Observational Constraints on Higher Order Clustering up to $z\simeq 1 (2000)
Szapudi, István, Postman, Marc, Lauer, Tod R., Oegerle, William
Constraints on the validity of the hierarchical gravitational instability theory and the evolution of biasing are presented based upon measurements of higher order clustering statistics in the...
The luminosity dependence of clustering and higher order correlations in the PSCz survey (2000)
Szapudi, István, Branchini, Enzo, Frenk, C. S., Maddox, Steve, Saunders, Will
We investigate the spatial clustering of galaxies in the PSCz galaxy redshift survey, as revealed by the two-point correlation function, the luminosity mark correlations, and the moments of...
Experimental Cosmic Statistics I: Variance (1999)
Colombi, Stéphane, Szapudi, István, Jenkins, Adrian, Colberg, Jörg
Counts-in-cells are measured in the $\tau$CDM Virgo Hubble Volume simulation. This large N-body experiment has 10^9 particles in a cubic box of size 2000 h^{-1} Mpc. The unprecedented combination of...
Experimental Cosmic Statistics II: Distribution (1999)
Szapudi, István, Colombi, Stéphane, Jenkins, Adrian, Colberg, Jörg
Colombi et al. 1999 (paper I) investigated the counts-in-cells statistics and their respective errors in the $\tau$CDM Virgo Hubble Volume simulation. This extremely large $N$-body experiment also...
Comparison of the Large Scale Clustering in the APM and the EDSGC Galaxy Surveys (1997)
Szapudi, István, Gaztañaga, E.
Clustering statistics are compared in the Automatic Plate Machine (APM) and the Edinburgh/Durham Southern Galaxy Catalogue (EDSGC) angular galaxy surveys. Both surveys were independently constructed...
A New Class of Estimators for the N-point Correlations (1997)
Szapudi, István, Szalay, Alexander S.
A class of improved estimators is proposed for N-point correlation functions of galaxy clustering, and for discrete spatial random processes in general. In the limit of weak clustering, the variance...
Cumulant Correlators from the APM (1997)
Szapudi, István, Szalay, Alexander S.
This work presents a set of new statistics, the cumulant correlators, aimed at high precision analysis of the galaxy distribution. They form a symmetric matrix, $Q_{NM}$, related to moment...
Higher Order Statistics from the EDSGC Survey I: Counts in Cells (1996)
Szapudi, István, Meiksin, Avery, Nichol, Robert C.
Counts in cells are used to analyse the higher order properties of the statistics of the EDSGC survey. The probability distribution is obtained from an equal area projection source catalog with...
Cosmic Error and the Statistics of Large Scale Structure (1995)
Szapudi, István, Colombi, Stéphane
We examine the errors on counts in cells extracted from galaxy surveys. The measurement error, related to the finite number of sampling cells, is disentangled from the ``cosmic error'', due to the...
Effects of Sampling on Measuring Galaxy Count Probabilities (1995)
Szapudi, István, Szalay, Alexander S.
We investigate in detail the effects of sampling on our ability to accurately reconstruct the distribution of galaxies from galaxy surveys. We use a simple probability theory approach, Bayesian...
Higher Order Statistics from the Apm Galaxy Survey (1994)
Szapudi, István, Dalton, Gavin, Efstathiou, George, Szalay, Alexander
We apply a new statistics, the factorial moment correlators, to density maps obtained from the APM survey. The resulting correlators are all proportional to the two point correlation function,...