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RoboPol is a four-channel, one-shot linear optical polarimeter that has been successfully operating since 2013 on the 1.3 m telescope at Skinakas Observatory in Crete, Greece. Using its unique optical system, it measures the linear Stokes…

Instrumentation and Methods for Astrophysics · Physics 2024-07-23 Siddharth Maharana , Dmitry Blinov , A. N. Ramaprakash , Vasiliki Pavlidou , Konstantinos Tassis

The polarisation of x-ray photons can be determined by measuring the direction of emission of a K-shell photoelectron. Effective exploitation of this effect below 10 keV would allow development of a highly sensitive x-ray polarimeter…

Although not designed primarily as a polarimeter, the \textit{Fermi}-Large Area Telescope (LAT) has the potential to detect high degrees of linear polarization from some of the brightest gamma-ray sources. To achieve the needed accuracy in…

Instrumentation and Methods for Astrophysics · Physics 2019-08-14 Matteo Giomi , Rolf Bühler , Carmelo Sgrò , Francesco Longo , William Atwood

Polarization measurements of hard X-rays from solar flares can provide a direct handle on the extent to which the accelerated electrons are beamed, which, in turn, has important implications for particle acceleration models. Past efforts to…

Astrophysics · Physics 2009-11-07 M. L. McConnell , J. M. Ryan , D. M. Smith , R. P. Lin , A. G. Emslie

The XL-Calibur balloon-borne hard X-ray polarimetry mission comprises a Compton-scattering polarimeter placed at the focal point of an X-ray mirror. The polarimeter is housed within a BGO anticoincidence shield, which is needed to mitigate…

The precision physics program of the ILC requires precise knowledge of the state of beam polarisation. In fact the Compton polarimeters intended for the ILC will have to measure the polarisation with error a factor of 2 smaller than the…

Instrumentation and Detectors · Physics 2014-11-20 Christoph Bartels , Anthony Hartin , Christian Helebrant , Daniela Kaefer , Jenny List

The recent detection of linear polarization from GRB120206 has piqued the interest of the community in this relatively unexplored avenue of research. Here, we review the current status and prospects for GRB polarimetry at hard X-ray and…

Astrophysics · Physics 2009-11-11 M. L. McConnell , P. F. Bloser

IXPE (Imaging X-ray Polarimetry Explorer) is a NASA Small Explorer mission -- in partnership with the Italian Space Agency (ASI) -- dedicated to X-ray polarimetry in the 2--8 keV energy band. The IXPE telescope comprises three grazing…

Instrumentation and Methods for Astrophysics · Physics 2022-08-26 Alessandro Di Marco , Sergio Fabiani , Fabio La Monaca , Fabio Muleri , John Rankin , Paolo Soffitta , Fei Xie , Fabrizio Amici , Primo attinà , Matteo Bachetti , Luca Baldini , Mattia Barbanera , Wayne Baumgartner , Ronaldo Bellazzini , Fabio Borotto , Alessandro Brez , Daniele Brienza , Ciro Caporale , Claudia Cardelli , Rita Carpentiero , Simone Castellano , Marco Castronuovo , Luca Cavalli , Elisabetta Cavazzuti , Marco Ceccanti , Mauro Centrone , Saverio Citraro , Enrico Costa , Elisa D'Alba , Fabio D'Amico , Ettore Del Monte , Sergio Di Cosimo , Niccolò Di Lalla , Giuseppe Di Persio , Immacolata Donnarumma , Yuri Evangelista , Riccardo Ferrazzoli , Luca Latronico , Carlo Lefevre , Pasqualino Loffredo , Paolo Lorenzi , Leonardo Lucchesi , Carlo Magazzù , Guido Magazzù , Simone Maldera , Alberto Manfreda , Elio Mangraviti , Marco Marengo , Giorgio Matt , Paolo Mereu , Massimo Minuti , Alfredo Morbidini , Federico Mosti , Hikmat Nasimi , Barbara Negri , Alessio Nuti , Stephen L. O'Dell , Leonardo Orsini , Matteo Perri , Melissa Pesce-Rollins , Raffaele Piazzolla , Stefano Pieraccini , Maura Pilia , Michele Pinchera , Alessandro Profeti , Simonetta Puccetti , Brian D. Ramsey , Ajay Ratheesh , Alda Rubini , Francesco Santoli , Paolo Sarra , Emanuele Scalise , Andrea Sciortino , Carmelo Sgrò , Gloria Spandre , Marcello Tardiola , Allyn F. Tennant , Antonino Tobia , Alessio Trois , Marco Vimercati , Martin C. Weisskopf , Davide Zanetti , Francesco Zanetti

We present the design and characterization of a ground-based absolute polarization angle calibrator accurate to better than 0.1 degrees for use with polarization sensitive cosmic microwave background (CMB) experiments. The calibrator's…

Instrumentation and Methods for Astrophysics · Physics 2018-09-07 M. F. Navaroli , G. P. Teply , K. D. Crowley , J. P. Kaufman , N. B. Galitzki , K. S. Arnold , B. G. Keating

In this diploma thesis, the calibration of the vector polarimeter POLIS will be described. The instrument is built by the Kiepenheuer-Institut fuer Sonnenphysik (Freiburg/Germany) in cooperation with the High Altitude Observatory…

Instrumentation and Methods for Astrophysics · Physics 2013-08-23 C. Beck

The Imaging X-ray Polarimetry Explorer is an X-ray observatory measuring the X-ray polarization in the 2-8 keV energy range. Highly sensitive to the system's geometry, X-ray polarization is a unique method to probe the structure of X-ray…

High Energy Astrophysical Phenomena · Physics 2025-09-25 M. Brigitte , J. Svoboda

Polarized neutrons are a powerful probe to investigate magnetism in condensed matter on length scales from single atomic distances to micrometers. With the ongoing advancement of neutron optics, that allow to transport beams with increased…

Instrumentation and Detectors · Physics 2017-08-02 Jochen Stahn , Artur Glavic

A Fabry-Perot cavity polarimeter, installed in 2003 at HERA for the second phase of its operation, is described. The cavity polarimeter was designed to measure the longitudinal polarisation of the HERA electron beam with high precision for…

Polarization leakage of foreground synchrotron emission is a critical issue in HI intensity mapping experiments. While the sought-after HI emission is unpolarized, polarized foregrounds such as Galactic and extragalactic synchrotron…

Instrumentation and Methods for Astrophysics · Physics 2016-12-28 Yu-Wei Liao , Tzu-Ching Chang , Cheng-Yu Kuo , Kiyoshi Wesley Masui , Niels Oppermann , Ue-Li Pen , Jeffrey B. Peterson

CMB experiments aiming at a precise measurement of the CMB polarization, such as the Planck satellite, need a strong polarized absolute calibrator on the sky to accurately set the detectors polarization angle and the cross-polarization…

The PoGO mission, including the PoGOLite Pathfinder and PoGO+, aims to provide polarimetric measurements of the Crab system and Cygnus X-1 in the hard X-ray band. Measurements are conducted from a stabilized balloon-borne platform, launched…

Instrumentation and Methods for Astrophysics · Physics 2018-03-07 M. Friis , M. Kiss , V. Mikhalev , M. Pearce , H. Takahashi

The polarization of X-ray emission is a unique tool used to investigate the magnetic field structure around astrophysical objects. In this paper, we study the linear polarization of X-ray emissions from gamma-ray binary systems based on…

High Energy Astrophysical Phenomena · Physics 2022-08-17 Xingxing Hu , Jumpei Takata

The B-Machine Telescope is the culmination of several years of development, construction, characterization and observation. The telescope is a departure from standard polarization chopping of correlation receivers to a half wave plate…

Instrumentation and Methods for Astrophysics · Physics 2013-11-11 Brian D. Williams

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…