TY - GEN
T1 - The matter spectral density from lensed cosmic microwave background observations
AU - Anderes, Ethan
AU - Van Engelen, Alexander
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2013
Y1 - 2013
N2 - We use local likelihood estimates of gravitational shear and convergence from lensed cosmic microwave background observations to estimate the projected mass spectral density. Typically there is an additive bias when using a plugin estimate of the spectral density from a noisy estimate of the random field. We explore the possibility of adjusting this bias by subtracting an approximate power spectrum of the noise in the reconstruction using unlensed simulations. We demonstrate some empirical results that suggest the remaining biases complement those seen in the quadratic estimate developed by Hu and Okamoto (ApJ 557:L79- L83, 2001; ApJ 574:566-574, 2002; Phys Rev D 67:083002, 2003). We finish the paper with a discussion regarding the potential scientific applications and the challenges associated with estimating the noise spectrum from simulations.
AB - We use local likelihood estimates of gravitational shear and convergence from lensed cosmic microwave background observations to estimate the projected mass spectral density. Typically there is an additive bias when using a plugin estimate of the spectral density from a noisy estimate of the random field. We explore the possibility of adjusting this bias by subtracting an approximate power spectrum of the noise in the reconstruction using unlensed simulations. We demonstrate some empirical results that suggest the remaining biases complement those seen in the quadratic estimate developed by Hu and Okamoto (ApJ 557:L79- L83, 2001; ApJ 574:566-574, 2002; Phys Rev D 67:083002, 2003). We finish the paper with a discussion regarding the potential scientific applications and the challenges associated with estimating the noise spectrum from simulations.
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U2 - 10.1007/978-1-4614-3520-4-6
DO - 10.1007/978-1-4614-3520-4-6
M3 - Conference contribution
AN - SCOPUS:84894329282
SN - 9781461449508
T3 - Information Systems Development: Reflections, Challenges and New Directions
SP - 65
EP - 77
BT - Information Systems Development
T2 - 20th International Conference on Information Systems Development: Reflections, Challenges and New Directions, ISD 2011
Y2 - 24 August 2011 through 26 August 2011
ER -