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X-ray Polarimetry

X-ray Polarimetry
Author: Ronaldo Bellazzini
Publisher: Cambridge University Press
Total Pages: 384
Release: 2010-07-08
Genre: Science
ISBN: 9780521191845
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Due to the advent of a new generation of detectors, X-ray polarimetry promises to join X-ray imaging, spectroscopy and timing as one of the main observational techniques in high energy astrophysics. This has renewed interest in the field, and indeed several polarimetric missions have recently been proposed. This volume provides a complete and up-to-date view of the subject for researchers in astrophysics. The contributors discuss the present status and perspectives of instruments, review current theoretical models, and examine future missions. As well as detailed papers, the book contains broad reviews that can be easily understood by astrophysicists new to the field.

X-ray Polarimetry

X-ray Polarimetry
Author: Ronaldo Bellazzini
Publisher: Cambridge University Press
Total Pages: 385
Release: 2010-07-08
Genre: Science
ISBN: 1139488031
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Download X-ray Polarimetry Book in PDF, ePub and Kindle

Due to the advent of a new generation of detectors, X-ray polarimetry promises to join X-ray imaging, spectroscopy and timing as one of the main observational techniques in high energy astrophysics. This has renewed interest in the field, and indeed several polarimetric missions have recently been proposed. This volume provides a complete and up-to-date view of the subject for researchers in astrophysics. The contributors discuss the present status and perspectives of instruments, review current theoretical models, and examine future missions. As well as detailed papers, the book contains broad reviews that can be easily understood by astrophysicists new to the field.

Relativistic Jets in the Era of X-ray Polarimetry

Relativistic Jets in the Era of X-ray Polarimetry
Author: Abel Lawrence Peirson V
Publisher:
Total Pages: 0
Release: 2023
Genre:
ISBN:
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Measuring X-ray polarization has been a major goal in astrophysics for the last 40 years. With the launch of NASA's Imaging X-ray Polarimetry Explorer (IXPE) in December 2021, soft X-ray polarimetry (1-10 keV) is now possible. In this thesis, I introduce an optimal signal extraction method for X-ray polarimeters based on gas pixel detectors. Using IXPE's thus improved sensitivity, I make progress towards identifying the high-energy emission processes and magnetic field geometries responsible for radiation in blazar jets. First, I develop a simulation-based inference framework for measuring X-ray polarization as a function of time, energy, and position in gas pixel detectors, proving that for a fixed model budget the framework is optimal. Second, I propose a simple geometrical jet model to study the polarization properties of leptonic blazar jets, including their observed EVPA rotations and their detection prospects with IXPE. Finally, I interpret IXPE's measurements of BL Lacertae across the synchro-Compton transition region to suggest leptonic-dominated emission processes in blazars, and of Mrk 421 to provide evidence for helical magnetic fields as the source of EVPA rotations.

Astronomical Polarisation from the Infrared to Gamma Rays

Astronomical Polarisation from the Infrared to Gamma Rays
Author: Roberto Mignani
Publisher: Springer Nature
Total Pages: 393
Release: 2019-09-14
Genre: Science
ISBN: 3030197158
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This book serves as both a primer to astronomical polarimetry and an authoritative overview of its application to various types of astronomical objects from AGN, compact stars, binary systems, stars across the HR diagram, transients, the interstellar medium and solar system bodies. It starts with an historical perspective, a discussion of polarimetric theory, instrumentation and techniques in wave bands from the near infrared to gamma rays. The book presents the state of the art in astronomical polarimetry. It is motivated by the new X-ray polarimeters due to be launched in the next four years and improved optical polarimeters on large telescopes requiring a new analysis of polarimetric theory, methodology and results.This book will be suitable as advanced undergraduate companion text, a primer for graduate students and all researchers with an interest in astronomical polarimetry.

X-Ray and Neutron Dynamical Diffraction

X-Ray and Neutron Dynamical Diffraction
Author: André Authier
Publisher: Springer Science & Business Media
Total Pages: 419
Release: 2012-12-06
Genre: Science
ISBN: 1461558794
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This volume collects the proceedings of the 23rd International Course of Crystallography, entitled "X-ray and Neutron Dynamical Diffraction, Theory and Applications," which took place in the fascinating setting of Erice in Sicily, Italy. It was run as a NATO Advanced Studies Institute with A. Authier (France) and S. Lagomarsino (Italy) as codirectors, and L. Riva di Sanseverino and P. Spadon (Italy) as local organizers, R. Colella (USA) and B. K. Tanner (UK) being the two other members of the organizing committee. It was attended by about one hundred participants from twenty four different countries. Two basic theories may be used to describe the diffraction of radiation by crystalline matter. The first one, the so-called geometrical, or kinematical theory, is approximate and is applicable to small, highly imperfect crystals. It is used for the determination of crystal structures and describes the diffraction of powders and polycrystalline materials. The other one, the so-called dynamical theory, is applicable to perfect or nearly perfect crystals. For that reason, dynamical diffraction of X-rays and neutrons constitutes the theoretical basis of a great variety of applications such as: • the techniques used for the characterization of nearly perfect high technology materials, semiconductors, piezoelectric, electrooptic, ferroelectric, magnetic crystals, • the X-ray optical devices used in all modem applications of Synchrotron Radiation (EXAFS, High Resolution X-ray Diffractometry, magnetic and nuclear resonant scattering, topography, etc. ), and • X-ray and neutron interferometry.