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We examine the potential for gamma-ray conversion to electron-positron pairs, either in the field of a nucleus or of an electron of a detector, to measure the fraction P of linear polarization of cosmic gamma sources. For this purpose we…

Instrumentation and Methods for Astrophysics · Physics 2013-09-27 Denis Bernard

A new window is opening in high-energy astronomy: X-ray polarimetry. With many missions currently under development and scheduled to launch as early as 2021, observations of the X-ray polarisation of accreting X-ray pulsars will soon be…

High Energy Astrophysical Phenomena · Physics 2020-11-16 Ilaria Caiazzo , Jeremy Heyl

A new pulsar signal-processing pipeline has been developed for observing pulsars with the Diamond Array Radio Telescope at the Gauribidanur radio observatory. The array consists of 32 off-axis dual-polarised LPDAs, with a nominal gain of 22…

Instrumentation and Methods for Astrophysics · Physics 2026-02-03 Arul Pandian B , Joydeep Bagchi , Prabu Thiagaraj , K. B. Raghavendra Rao , Vinutha Chandrashekar

Optical polarimeters are typically calibrated using measurements of stars with known and stable polarization parameters. However, there is a lack of such stars available across the sky. Many of the currently available standards are not…

POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland in Chile at an altitude of 5200 m. Its science goals are to measure the CMB polarization signals originating from…

The Antarctic TianMu Staring Observation Program is a time-domain optical sky survey project carried out in Antarctica, capable of large sky coverage, high-cadence sampling, and long-period staring. It utilizes the exceptional observing…

Instrumentation and Methods for Astrophysics · Physics 2026-01-01 Hubiao Niu , Jing Zhong , Yu Zhang , Jianchun Shi , Rui Rong , Jinzhong Liu , Shiyin Shen , Zhenghong Tang , Dan Zhou

The document describes the physics case of the PAX experiment using polarized antiprotons, which has recently been proposed for the new Facility for Antiprotons and Ions Research (FAIR) at GSI--Darmstadt. Polarized antiprotons provide…

High Energy Physics - Experiment · Physics 2019-08-14 Paolo Lenisa , Frank Rathmann

ESA's INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) was launched on 17 Oct 2002 at 06:41 CEST. Since then, it has been providing long, uninterrupted observations (up to about 47 hr, or 170 ksec, per satellite orbit of 2.7 days)…

Instrumentation and Methods for Astrophysics · Physics 2021-06-24 Erik Kuulkers , Carlo Ferrigno , Peter Kretschmar , Julia Alfonso-Garzon , Marius Baab , Angela Bazzano , Guillaume Belanger , Ian Benson , Anthony J. Bird , Enrico Bozzo , Soren Brandt , Elliott Coe , Isabel Caballero , Floriane Cangemi , Jerome Chenevez , Bradley Cenko , Nebil Cinar , Alexis Coleiro , Stefano De Padova , Roland Diehl , Claudia Dietze , Albert Domingo , Mark Drapes , Eleonora D'uva , Matthias Ehle , Jacobo Ebrero , Mithrajith Edirimanne , Natan A. Eismont , Timothy Finn , Mariateresa Fiocchi , Elena Garcia Tomas , Gianluca Gaudenzi , Thomas Godard , Andrea Goldwurm , Diego Gotz , Christian Gouiffes , Sergei A. Grebenev , Jochen Greiner , Aleksandra Gros , Lorraine Hanlon , Wim Hermsen , Cristina Hernandez , Margarita Hernanz , Jutta Huebner , Elisabeth Jourdain , Giovanni La Rosa , Claudio Labanti , Philippe Laurent , Alexander Lehanka , Niels Lund , James Madison , Julien Malzac , Jim Martin , J. Miguel Mas-Hesse , Brian McBreen , Alastair McDonald , Julie McEnery , Sandro Mereghetti , Lorenzo Natalucci , Jan-Uwe Ness , Carol Anne Oxborrow , John Palmer , Sibylle Peschke , Francesco Petrucciani , Norbert Pfeil , Michael Reichenbaecher , James Rodi , Jerome Rodriguez , Jean-Pierre Roques , Emilio Salazar Donate , Dave Salt , Celia Sanchez-Fernandez , Aymeric Sauvageon , Volodymyr Savchenko , Sergey Yu. Sazonov , Stefano Scaglioni , Norbert Schartel , Thomas Siegert , Richard Southworth , Rashid A. Sunyaev , Liviu Toma , Pietro Ubertini , Ed P. J. van den Heuvel , Andreas von Kienlin , Nikolai von Krusenstiern , Christoph Winkler , Hajdas Wojciech , Ugo Zannoni

The C-Band All-Sky Survey (C-BASS) aims to produce sensitive, all-sky maps of diffuse Galactic emission at 5 GHz in total intensity and linear polarization. These maps will be used (with other surveys) to separate the several astrophysical…

The Polarized Gamma-ray Observer (PoGOLite) is a balloon-borne instrument that can measure polarization in the energy range 25--240 keV. The instrument adopts an array of well-type "phoswich" detectors in order to suppress backgrounds.…

High Energy Astrophysical Phenomena · Physics 2019-08-15 Takafumi Kawano

At millimeter wavelengths, the atmospheric emission is circularly polarized owing to the Zeeman splitting of molecular oxygen by the Earth's magnetic field. We report a measurement of the signal in the 150 GHz band using 3 years of…

This paper discusses issues encountered during the early development of the instrument on the Imaging X-ray Polarimetry Explorer (IXPE), a NASA ASI Small Explorer mission launched on 9 December 2021. IXPE has observed about 100 sources,…

The INTEGRAL satellite, which studies the Universe in the hard X-ray and soft Gamma-ray domain, has been operational for 5 years now. The X-ray telescopes, which use the coded mask technique, provide unprecedented spectral and imaging…

Astrophysics · Physics 2017-08-23 Volker Beckmann

CO2 emissions from power plants, as significant super emitters, contribute substantially to global warming. Accurate quantification of these emissions is crucial for effective climate mitigation strategies. While satellite-based plume…

Computer Vision and Pattern Recognition · Computer Science 2025-02-05 Dibyabha Deb , Kamal Das

We present POLAR, a polynomial arithmetic-based framework for efficient bounded-time reachability analysis of neural-network controlled systems (NNCSs). Existing approaches that leverage the standard Taylor Model (TM) arithmetic for…

Systems and Control · Electrical Eng. & Systems 2022-12-27 Chao Huang , Jiameng Fan , Zhilu Wang , Yixuan Wang , Weichao Zhou , Jiajun Li , Xin Chen , Wenchao Li , Qi Zhu

The Gamma RAy Polarimeter Experiment (GRAPE), a balloon borne Compton polarimeter for 50-500 keV gamma rays, was successfully flown for the second time in 2014. GRAPE consists of 24 collimated polarimeter modules. Each module is made up of…

Instrumentation and Methods for Astrophysics · Physics 2020-12-25 Sambid K. Wasti

The NASA/ASI Imaging X-ray Polarimetry Explorer, which will be launched in 2021, will be the first instrument to perform spatially resolved X-ray polarimetry on several astronomical sources in the 2-8 keV energy band. These measurements are…

Electron-positron pair production is the essential process for high-energy gamma-ray astrophysical observations. Following the pioneering OSO-3 counter telescope, the field evolved into use of particle tracking instruments, largely derived…

High Energy Astrophysical Phenomena · Physics 2023-04-05 David J. Thompson , Alexander A. Moiseev

Fifty years after the very first sounding rocket measurement of cosmic X-ray polarization, the Imaging X-ray Polarimetry Explorer (IXPE) mission has effectively opened a new window into the X-ray sky. Prior to launch of IXPE, an extensive…

We propose a "thin" detector as a high-angular-precision telescope and polarimeter for cosmic gamma-rays above the pair-creation threshold. We have built a demonstrator based on a gaseous TPC. We are presently characterizing the detector…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 Denis Bernard