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We investigate the use of harmonic analysis techniques to perform measurements of the angular power spectrum on mock pulsar timing data for an isotropic stochastic gravitational-wave background (SGWB) with a dimensionless strain amplitude…

广义相对论与量子宇宙学 · 物理学 2024-09-19 Jonathan Nay , Kimberly K. Boddy , Tristan L. Smith , Chiara M. F. Mingarelli

The Gamma-RAy Polarimeter Experiment (GRAPE) is a concept for an astronomical hard X-ray Compton polarimeter operating in the 50 - 500 keV energy band. The instrument has been optimized for wide-field polarization measurements of transient…

天体物理学 · 物理学 2009-11-13 P. F. Bloser , J. S. Legere , M. L. McConnell , J. R. Macri , C. M. Bancroft , T. P. Connor , J. M. Ryan

The Chandra Multiwavelength Plane (ChaMPlane) Survey is a comprehensive effort to constrain the population of accretion-powered and coronal low-luminosity X-ray sources (L_X < 10^33 erg s^-1) in the Galaxy. ChaMPlane incorporates X-ray,…

天体物理学 · 物理学 2008-03-19 Kyle Penner , Maureen van den Berg , JaeSub Hong , Silas Laycock , Ping Zhao , Jonathan Grindlay

The Spitzer Extended Deep Survey (SEDS) as a deep and wide mid-infrared (MIR) survey project provides a sample of 500000+ sources spreading 1.46 square degree and a depth of 26 AB mag (3$\sigma$). Combining with the previous available data,…

We study the detection of extragalactic point sources in two-dimensional flat simulations for all the frequencies of the forthcoming ESA's Planck mission. In this work we have used the most recent available templates of the microwave sky:…

The Planck sub-mm surveys detected the brightest strongly gravitationally lensed dusty galaxies in the sky. The combination of their extreme gravitational flux boosting and image stretching offers the unique possibility of measuring in…

The ability to collect unprecedented amounts of astronomical data has enabled the studying scientific questions that were impractical to study in the pre-information era. This study uses large datasets collected by four different robotic…

宇宙学与河外天体物理 · 物理学 2022-06-02 Lior Shamir

In this work we simulate the $50-200$ MHz radio sky that is constrained in the field of view ($5^{\circ}$ radius) of the 21 Centimeter Array (21CMA), by carrying out Monte-Carlo simulations to model redshifted cosmological reionization…

宇宙学与河外天体物理 · 物理学 2015-05-19 Jingying Wang , Haiguang Xu , Junhua Gu , Tao An , Haijuan Cui , Jianxun Li , Zhongli Zhang , Qian Zheng , Xiang-Ping Wu

The analysis of current Cosmic Microwave Background (CMB) experiments is based on the interpretation of multi-frequency sky maps in terms of different astrophysical components and it requires specifically tailored component separation…

天体物理仪器与方法 · 物理学 2015-05-19 G. Hurier , J. F. Macias-Perez , S. R. Hildebrandt

Within the scope of the Planck IDIS (Integrated Data Information System) project we have started to develop the data model for time-ordered data and full-sky maps. The data model is part of the Data Management Component (DMC), a software…

天体物理学 · 物理学 2009-10-31 G. Giardino , A. J. Banday , K. Bennett , P. Fosalba , K. M. Gorski , W. O'Mullane , J. Tauber , C. Vuerli

The CMB Planck satellite (ESA) will provide a catalogue of nearly 30000 galaxy clusters (Sunyaev-Zel'dovich effect) between redshift 0 and approx. 2-3 (depending on the cosmological model). This hughe catalogue of clusters will allow…

天体物理学 · 物理学 2007-05-23 J. M. Diego , E. Martinez-Gonzalez , J. L. Sanz , N. Benitez , J. Silk

We present the South Galactic Pole (SGP) data release from the GaLactic and Extragalactic All-sky Murchison Widefield Array (GLEAM) survey. These data combine both years of GLEAM observations at 72-231 MHz conducted with the Murchison…

星系天体物理 · 物理学 2021-08-20 T. Franzen , N. Hurley-Walker , S. White , P. Hancock , N. Seymour , A. Kapińska , L. Staveley-Smith , R. Wayth

Compiled radio spectra are presented for 208 extragalactic sources from the catalog created from the WMAP satellite all-sky survey data in a range of 23-94 GHz taken during the first year of its operation in orbit. 205 out of 208 WMAP…

天体物理学 · 物理学 2007-05-23 Sergei A. Trushkin

We present a new library of integrated spectra of 40 Galactic globular clusters, obtained with the Blanco 4-m telescope and the R-C spectrograph at the Cerro Tololo Interamerican Observatory. The spectra cover the range ~ 3350 -- 6430 A…

天体物理学 · 物理学 2009-11-11 Ricardo P. Schiavon , James A. Rose , Stephane Courteau , Lauren A. MacArthur

We report high-resolution spectroscopy of 125 field stars previously observed as part of the Sloan Digital Sky Survey and its program for Galactic studies, the Sloan Extension for Galactic Understanding and Exploration (SEGUE). These…

We present Atacama Large Millimeter/submillimiter Array (ALMA) high sensitivity ($\sigma_P \simeq 0.4\,$mJy) polarimetric observations at $97.5\,$GHz (Band 3) of a complete sample of $32$ extragalactic radio sources drawn from the faint…

Context. The advent of wide-band receiver systems on interferometer arrays enables one to undertake high-sensitivity and high-resolution radio continuum surveys of the Galactic plane in a reasonable amount of telescope time. However, to…

Wavelet-related techniques have proven useful in the processing and analysis of one and two dimensional data sets (spectra in the former case, images in the latter). In this work we apply adaptive filters, introduced in a previous work…

天体物理学 · 物理学 2009-11-07 D. Herranz , J. Gallegos , J. L. Sanz , E. Martinez-Gonzalez

The Planck satellite is expected to improve the measurement of most cosmological parameters by several factors with respect to current WMAP results. The actual performance may depend upon various aspects of the data analysis. In this paper…

天体物理学 · 物理学 2010-11-02 L. P. L. Colombo , E. Pierpaoli , J. R. Pritchard