BIASES IN PHYSICAL PARAMETER ESTIMATES THROUGH DIFFERENTIAL LENSING MAGNIFICATION

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The regional estimates of the GPS satellite and receiver differential code biases

The Differential Code Biases (DCB), which are also termed hardware delay biases, are the frequency-dependent time delays of the satellite and receiver. Possible sources of these delays are antennas and cables, as well as different filters used in receivers and satellites. These instrumental delays affect both code and carrier measurements. These biases for satellites and some IGS stations tend ...

متن کامل

Biases of parameter estimates in misspecified structural equation models

We propose a framework to handle lack of fit problems in structural equation models by analyzing misspecified moments. This framework allows to relate misspecification of the moment equations to biases of parameter estimates and non-centrality of the model. Misspecification of a single moment is shown to lead to misfit of all moments as well as biases in most parameter estimates in full informa...

متن کامل

Gravitational Lensing Magnification without Multiple Imaging

Gravitational lensing can amplify the apparent brightness of distant sources. For most lensing geometries, images that are significantly magnified are part of multiply-imaged systems, but that need not always be the case. We consider the extent to which lensing can produce large magnifications without creating more than one detectable image. One possibility is that lensing produces a single ima...

متن کامل

QSO lensing magnification associated with galaxy groups

We simulated both the matter and light (galaxy) distributions in a wedge of the universe and calculated the gravitational lensing magnification caused by the mass along the line of sight of galaxies and galaxy groups identified in sky surveys. A large volume redshift cone containing cold dark matter particles mimics the expected cosmological matter distribution in a flat universe with low matte...

متن کامل

Shear calibration biases in weak lensing surveys

We investigate biases induced by the conversion between the observed image shape to shear distortion in current weak lensing analysis methods. Such overall calibration biases cannot be detected by the standard tests such as E/B decomposition or calibration with stars. We find that the non-Gaussianity of point spread function has a significant effect and can lead to up to 15 per cent error on th...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: The Astrophysical Journal

سال: 2013

ISSN: 0004-637X,1538-4357

DOI: 10.1088/0004-637x/770/2/110