Visibility-based angular power spectrum estimation in low-frequency radio interferometric observations

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

Ionospheric Calibration of Low Frequency Radio Interferometric Observations using the Peeling Scheme

Calibration of radio interferometric observations becomes increasingly difficult towards lower frequencies. Below ∼ 300 MHz, spatially variant refractions and propagation delays of radio waves traveling through the ionosphere cause phase rotations that can vary significantly with time, viewing direction and antenna location. In this article we present a description and first results of SPAM (So...

متن کامل

Low Frequency Radio Observations Of W51 Complex

W51 is a giant radio complex lying along the tangent to the Saggitarius arm at a distance of about 7kpc from Sun, with an extension of about 1◦ in the sky. It is divided into three components A,B,C where W51A and W51B are regions consisting of many compact HII sources.We have made continuum radio observations of these HII regions of W51 complex at 240,610,1060,1400 MHz frequencies using GMRT. T...

متن کامل

The angular power spectrum of NVSS radio galaxies

We measure the angular power spectrum Cl of radio galaxies in the NRAO VLA Sky Survey (NVSS) using two independent methods: direct spherical harmonic analysis and maximum likelihood estimation. The results are consistent and can be understood using models for the spatial matter power spectrum and for the redshift distribution of radio galaxies at mJy flux-density levels. A good fit to the angul...

متن کامل

Vlbi Observations of Low Power Radio Galaxies

The parsec scale properties of low power radio galaxies are reviewed here, using the available data on 12 FR I galaxies. The most frequent radio structure is an asymmetric parsec-scale morphology, i.e. core and one-sided jet. It is shared by 9 (possibly 10) of the 12 mapped radio galaxies. One (possibly 2) of the other galaxies has (have) a two-sided jet emission. Two sources are known from pub...

متن کامل

Radio-Interferometric Object Trajectory Estimation

In this paper a novel radio-interferometric object trajectory estimation method is proposed, which can be used to track moving objects. The system utilizes a low number of fixed infrastructure nodes equipped with radio transceivers, and the tracked object also carries a simple transceiver. Selected transmitter infrastructure nodes produce interference signals at the fixed infrastructure receive...

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: Monthly Notices of the Royal Astronomical Society

سال: 2014

ISSN: 1365-2966,0035-8711

DOI: 10.1093/mnras/stu2027