Results 81 to 90 of about 13,324 (197)

The Imaging X-ray Polarimetry Explorer (IXPE) and New Directions for the Future

Instruments
An observatory dedicated to X-ray polarimetry has been operational since 9 December 2021. The Imaging X-ray Polarimetry Explorer (IXPE), a collaboration between NASA and ASI, features three X-ray telescopes equipped with detectors sensitive to linear ...
Paolo Soffitta
doaj   +1 more source

Design and Tests of the Hard X-ray Polarimeter X-Calibur

Acta Polytechnica CTU Proceedings, 2014
X-ray polarimetry promises to give qualitatively new information bout high-energy astrophysical sources, such as binary black hole  systems, micro-quasars, active galactic nuclei, and gamma-ray bursts.
M. Beilicke, R. Cowsik, P. Dowkontt, Q. Guo, F. Kislat, S. Barthelmy, T. Okajima, J. W. Mitchell, J. Schnittman, B. Zeiger, G. De Geronimo, M. G. Baring, A. Bodaghee, T. Miyazawa, K. D. Finkelstein, H. Krawczynski   +15 more
doaj   +1 more source

X-ray polarimetry with the microstrip gas chamber

Journal of Synchrotron Radiation, 1998
A two-dimensional microstrip gas chamber (MSGC) with a 5 cm × 5 cm detection area has been developed. It has 254 anodes and 255 back strips, both with 200 µm pitches. Using this MSGC, linear polarization of X-rays was successfully measured in the energy range 6–14 keV.
Y, Nishi, S, Aoki, A, Ochi, T, Tanimori, T, Takahashi, Y, Ueda, K, Okada   +6 more
openaire   +2 more sources

A changing-look AGN to be probed by X-ray polarimetry

, 2018
Active galactic nuclei (AGN) produce the highest intrinsic luminosities in the Universe from within a compact region. The central engine is thought to be powered by accretion onto a supermassive black hole.
González, Beatriz Agís, Hutsemékers, Damien, Miniutti, Giovanni   +2 more
core   +2 more sources

X-RAY AND GAMMA-RAY POLARIMETRY OF GRBS [PDF]

EAS Publications Series, 2013
Polarimetry is expected to play a major role as a diagnostic tool for GRBs. Techniques and methods for X/Gamma ray polarimetry are reviewed including the specific problems related to the transient nature of the sources. Optical data do not encourage optimistic predictions on polarimetry of afterglows.
openaire   +1 more source

Considerations on Possible Directions for a Wide Band Polarimetry X-ray Mission

Galaxies
The Imaging X-ray Polarimetry Explorer (IXPE) has confirmed that X-ray polarimetry is a valuable tool in astronomy, providing critical insights into the emission processes and the geometry of compact objects.
Paolo Soffitta, Enrico Costa, Nicolas De Angelis, Ettore Del Monte, Klaus Desch, Alessandro Di Marco, Giuseppe Di Persio, Sergio Fabiani, Riccardo Ferrazzoli, Markus Gruber, Takahashi Hiromitsu, Saba Imtiaz, Philip Kaaret, Jochen Kaminski, Dawoon E. Kim, Fabian Kislat, Henric Krawczynski, Fabio La Monaca, Carlo Lefevre, Hemanth Manikantan, Herman L. Marshall, Romana Mikusincova, Alfredo Morbidini, Fabio Muleri, Stephen L. O’Dell, Takashi Okajima, Mark Pearce, Vladislavs Plesanovs, Brian D. Ramsey, Ajay Ratheesh, Alda Rubini, Shravan Vengalil Menon, Martin C. Weisskopf   +32 more
doaj   +1 more source

A gas pixel detector for x-ray polarimetry

Nuclear Physics B - Proceedings Supplements, 2006
Even though lacking of solid experimental verifications, X-ray polarimetry is strongly established as a deep diagnostic tool for probing the emission mechanisms in astronomical sources of high energy radiation. The recent development of new, more efficient instrumentation, as well as the renewed interest of the theoreticians, has drawn a significant ...
BALDINI, LUCA, ANGELINI, FRANCO, Bellazzini R, Bitti F, Brez A, Latronico L, MASSAI, MARCO MARIA, Minuti M, Omodei N, RAZZANO, MASSIMILIANO, Sgro C, Spandre G, Costa E, Soffitta P, Pacciani L.   +14 more
openaire   +3 more sources

IXPE Mission System Concept and Development Status [PDF]

The Goal of the Imaging X-Ray Polarimetry Explorer (IXPE) Mi SMEX), is to expand understanding of high-energy astrophysical processes and sources, in support of NASAs first science objective in Astrophysics: Discover how the universe works.
Baldini, Lucca, Bladt, Jeff, Deininger, William D., Del Monte, Ettore, Foster, Michele, Gray, Stu, Hibbard, Grant, Kalinowski, William, Latronico, Lucca, Masciarelli, James, Mize, Rondald, Muleri, Fabio, O'Dell, Stephen L., Osborne, Darren, Peterson, Colin, Pinchera, Michele, Ramsey, Brian D., Santoli, Francesco, Soffitta, Paolo, Tennant, Allyn, Trois, Alessio, Wedmore, Jeff, Weisskopf, Martin C.   +22 more
core   +1 more source

X-ray polarimetric signatures induced by spectral variability in the framework of the receding torus model

, 2016
Obscuring circumnuclear dust is a well-established constituent of active galactic nuclei (AGN). Traditionally referred to as the receding dusty torus, its inner radius and angular extension should depend on the photo-ionizing luminosity of the central ...
Goosmann, R. W., Marin, F., Petrucci, P. -O.   +2 more
core   +3 more sources

Polarimetry with a soft x-ray spectrometer

, 2008
An approach for measuring linear X-ray polarization over a broad-band using conventional spectroscopic optics is described. A set of multilayer-coated flats reflect the dispersed X-rays to the instrument detectors.
Marshall, Herman L.
core   +1 more source