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in creator/contributor: "Saha, A."  
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Properties of Ellipticity Correlation with Atmospheric Structure From Gemini South

Description: Cosmic shear holds great promise for a precision independent measurement of {Omega}{sub m}, the mass density of the universe relative to the critical density. The signal is expected to be weak, so a thorough understanding of systematic effects is crucial. An important systematic effect is the atmosphere: shear power introduced by the atmosphere is larger than the expected signal. Algorithms exist to extract the cosmic shear from the atmospheric component, though a measure of their success appli… more
Date: January 17, 2007
Creator: Asztalos, Stephen J.; de Vries, W. H.; Rosenberg, L. J.; Treadway, T.; Burke, D.; Claver, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Large Synoptic Survey Telescope: From Science Drivers to Reference Design

Description: In the history of astronomy, major advances in our understanding of the Universe have come from dramatic improvements in our ability to accurately measure astronomical quantities. Aided by rapid progress in information technology, current sky surveys are changing the way we view and study the Universe. Next-generation surveys will maintain this revolutionary progress. We focus here on the most ambitious survey currently planned in the visible band, the Large Synoptic Survey Telescope (LSST). LS… more
Date: October 14, 2011
Creator: Ivezic, Z.; Axelrod, T.; Brandt, W. N.; Burke, D. L.; Claver, C. F.; Connolly, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Properties of Ellipticity Correlation with Atmospheric Structure from Gemini South

Description: Cosmic shear holds great promise for a precision independent measurement of {Omega}{sub m}, the mass density of the universe relative to the critical density. The signal is expected to be weak, so a thorough understanding of systematic effects is crucial. An important systematic effect is the atmosphere: shear power introduced by the atmosphere is larger than the expected signal. Algorithms exist to extract the cosmic shear from the atmospheric component, though a measure of their success appli… more
Date: December 21, 2006
Creator: Asztalos, S. J.; Treadway, T.; de Vries, W. H.; Rosenberg, L. J.; Burke, D.; Claver, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Polarization Transfer in the He-4(polarized-e, e-prime polarized-p)H-3 Reaction up to Q{sup 2}=2.6 (GeV/c){sup 2}

Description: We have measured the proton recoil polarization in the {sup 4}He(polarized-e, e-prime, p){sup 3}H reaction at Q{sup 2} = 0.5, 1.0, 1.6, and 2.6 (GeV/c){sup 2}. The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a predicted medium modification of the proton form factors based on a quark-meson coupling model. In contrast, the measured induced polarizations agree reasonably well with the fully relativistic calculation i… more
Date: November 1, 2002
Creator: Strauch, S.; Dieterich, S.; Aniol, K. A.; Annand, J. R. M.; Baker, O. K.; Bertozzi, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

High Accuracy Beam Current Monitor of the CEBAF Hall A

Description: A beam current monitor system was developed to measure the CW electron beam current delivered to the CEBAF Hall A. The experiments require non-invasive measurements during beam delivery, with an absolute accuracy better than 0.2% in the current range from 1 to 180 mu-A. Two redundant cavities, and their associated electronics, monitor the beam current continuously. They are periodically calibrated with respect to a Parametric Current Transformer (PCT) manufactured by Bergoz, having an accurate … more
Date: June 1, 2001
Creator: Denard, J.-C. & Saha, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Physics program in Hall A at CEBAF

Description: We present here the physics program planned for Hall A at CEBAF. It encompass exclusive as well as inclusive electromagnetic measurements requiring both high precision and accuracy. The program includes measurements of the elementary form factors of the nucleon, systematic studies of the few nucleon systems (d, {sup 3,4}He), high momentum structure of nuclei, their structure at high Q{sup 2} to look for hadronization and quark effects, spin response of nuclei via ({rvec e}, e{prime}{rvec p}) re… more
Date: January 1, 1990
Creator: Saha, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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