Results 61 to 70 of about 808 (168)

General History of X-Ray Polarimetry in Astrophysics

, 2022
19 pages, no figure, Invited Chapter for the "Handbook of X-Ray and Gamma-Ray Astrophysics" (Eds. C.Bambi and A.Santangelo, Springer Singapore, expected in 2022)
openaire   +2 more sources

IXPE View of the Crab Pulsar Following the 2025 July 17 and August 6 Glitches

The Astrophysical Journal
The Crab pulsar experienced two relatively small glitches separated by only 20 days in 2025 September and October. Imaging X-ray Polarimetry Explorer (IXPE) observed the source twice, with delay times since the glitch epoch ranging between 35 and 75 days,
Paolo Soffitta, Niccolò Bucciantini, Josephine Wong, Denis González-Caniulef, Matteo Bachetti, Riccardo Ferrazzoli, Fei Xie, Enrico Costa, Maura Pilia, Nicolò Cibrario, Jack T. Dinsmore, Niccolò Di Lalla, Philip Kaaret, Kuan Liu, Tsunefumi Mizuno, Michela Negro, C.-Y. Ng, Nicola Omodei, Simone Pagliarella, Stefano Silvestri, Yi-Jung Yang, Martin C. Weisskopf   +21 more
doaj   +1 more source

Star-XP: A simulation framework for Polar-2/ low energy X-ray polarization detector

SoftwareX
Star-XP is a simulation framework specifically designed for the Low Energy X-ray Polarization Detector (LPD) onboard the POLAR-2 mission. It is capable of simulating the emission of particles from given sources and the interaction of these particles with
Di-Fan Yi, Qian Liu, Rui-Ting Ma, Bin-Long Wang, Hong-Bang Liu, Fei Xie, Huan-Bo Feng, Zu-Ke Feng, Yang-Heng Zheng   +8 more
doaj   +1 more source

Engineering Chiroptical Interactions through Integrating Plasmonic Arrays with Cholesteric Nanocellulose

Advanced Materials, Volume 38, Issue 16, 17 March 2026.
In this study, we demonstrate how the combination of plant‐based cellulose and gold nanoparticle lines produces robust, tunable chiral light control in composite films. The resulting plasmonic cellulose composite exhibits a strong plasmonic CD at the surface lattice resonance, along with an inversion of chiroptical response upon reversing the ...
Han Tao, Sunghwan Jo, Guang Chu, Xiaoyu Qi, Irene Estévez, Angel Lizana, Wenyang Xu, Shengwei Deng, Agustin Mihi, Eero Kontturi   +9 more
wiley   +1 more source

Scattering Polarimetry in the Hard X-ray Range

Instruments
In one and a half years, the Imaging X-ray Polarimetry Explorer has demonstrated the role and the potentiality of Polarimetry in X-ray Astronomy. The next steps include extension to higher energies.
Enrico Costa
doaj   +1 more source

Reinforcement Learning Enabled Nanophotonic Devices

Laser &Photonics Reviews, Volume 20, Issue 6, 18 March 2026.
A reinforcement learning algorithm is used to design photonic devices. The method creates metagratings and grating couplers that efficiently control both the direction and polarization of light. Further, a reinforcement learning approach is used to design in‐plane integrated photonic devices. This approach paves the way for advanced photonic components
Zi Wang, Junyeob Song, Minsuk Lee, Wenqi Zhu, Amit Agrawal   +4 more
wiley   +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

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

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

Polarimetry with a soft x-ray spectrometer [PDF]

SPIE Proceedings, 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. The intensity variation as a function of energy and position angle is measured to determine three Stokes parameters: I, Q, and U.
openaire   +4 more sources