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Related papers: Characterisation of the CAFOS linear spectro-polar…

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We describe a low-cost, open-access, CubeSat-based calibration instrument that is designed to support ground-based and sub-orbital experiments searching for various polarization signals in the cosmic microwave background (CMB). All modern…

Instrumentation and Methods for Astrophysics · Physics 2015-11-23 Bradley R. Johnson , Clement J. Vourch , Timothy D. Drysdale , Andrew Kalman , Steve Fujikawa , Brian Keating , Jon Kaufman

Polarization imaging can yield crucial information in multiple applications of remote sensing, such as characterization of clouds, aerosols, and the Aurora Borealis. Some applications require sub-percent polarimetric sensitivity and…

Instrumentation and Methods for Astrophysics · Physics 2024-05-14 Thijs Stockmans , Naor Scheinowitz , Erwoud van der Linden , Irina Malysheva , Kira Strelow , Martijn Smit , Frans Snik

The process of data taking, reduction and calibration of near-infrared imaging polarimetry data taken with the ESO Adaptive Optics System ADONIS is described. The ADONIS polarimetric facility is provided by a rotating wire grid polarizer.…

Astrophysics · Physics 2009-10-31 N. Ageorges , J. R. Walsh

Many circumstellar dust scattering regions have been detected and investigated with polarimetric imaging. However, the quantitative determination of the intrinsic polarization and of dust properties is difficult because of complex…

Solar and Stellar Astrophysics · Physics 2026-02-11 H. M. Schmid , J. Ma

We present deep polarimetric observations at 154 MHz with the Murchison Widefield Array (MWA), covering 625 deg^2 centered on RA=0 h, Dec=-27 deg. The sensitivity available in our deep observations allows an in-band, frequency-dependent…

We introduce MAPCAT, a long-term observing program for "Monitoring of AGN with Polarimetry at the Calar Alto Telescopes". Multi-spectral-range studies are critical to understand some of the most relevant current problems of high energy…

High Energy Astrophysical Phenomena · Physics 2015-06-03 Ivan Agudo , Sol N. Molina , Jose L. Gomez , Alan P. Marscher , Svetlana G. Jorstad , Jochen Heidt

We present high sensitivity ($\sigma_P \simeq 0.6\,$mJy) polarimetric observations in seven bands, from $2.1$ to $38\,$GHz, of a complete sample of $104$ compact extragalactic radio sources brighter than $200\,$mJy at $20\,$GHz.…

We present the first public data release of the CALIFA survey. It consists of science-grade optical datacubes for the first 100 of eventually 600 nearby (0.005<z<0.03) galaxies, obtained with the integral-field spectrograph PMAS/PPak…

We present a pipeline that allows recovering reliable information for all four Stokes parameters with high accuracy. Its novelty relies on the treatment of the instrumental effects already prior to the computation of the Stokes parameters…

Instrumentation and Methods for Astrophysics · Physics 2018-01-10 I. Myserlis , E. Angelakis , A. Kraus , C. A. Liontas , N. Marchili , M. F. Aller , H. D. Aller , V. Karamanavis , L. Fuhrmann , T. P. Krichbaum , J. A. Zensus

We completed observations with the Effelsberg 100-m radio telescope to measure the polarised emission from a complete sample of Compact Steep-Spectrum sources. We observed the sources at four different frequencies. We complemented these…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 F. Mantovani , K. -H. Mack , F. M. Montenegro-Montes , A. Rossetti , A. Kraus

Polarized light microscopy, as a contrast-enhancing technique for optically anisotropic materials, is a method well suited for the investigation of a wide variety of effects in solid-state physics, as for example birefringence in crystals…

Instrumentation and Detectors · Physics 2017-12-19 Matthias Lange , Stefan Guénon , Felix Lever , Reinhold Kleiner , Dieter Koelle

Spectropolarimetric results of Fraunhofer lines between 516.3nm and 532.6nm are presented in local upper solar chromosphere, transition zone and inner corona below a height of about 0.04 solar radius above the solar limb. The data were…

Solar and Stellar Astrophysics · Physics 2024-03-26 Z. Q. Qu , L. Chang , G. T. Dun , X. M. Cheng , C. Fang , Z. Xu , D. Yuan , L. H. Deng , X. Y. Zhang

A new method of polarimetric calibration is presented in which the instrumental response is derived from regular observations of PSR J0437-4715 based on the assumption that the mean polarized emission from this millisecond pulsar remains…

Instrumentation and Methods for Astrophysics · Physics 2013-01-14 W. van Straten

Bolometric corrections are used in quasar studies to quantify total energy output based on a measurement of a monochromatic luminosity. First, we enumerate and discuss the practical difficulties of determining such corrections, then we…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Jessie C. Runnoe , Michael S. Brotherton , Zhaohui Shang

We present results of deep polarization imaging at 1.4 GHz with the Dominion Radio Astrophysical Observatory as part of the DRAO Planck Deep Fields project. This deep extragalactic field covers 15.16 square degrees centered at RA = 16h 14m…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Julie Grant , Russ Taylor , Jeroen Stil , Tom Landecker , Roland Kothes , Ryan Ransom , Douglas Scott

WALOP (Wide-Area Linear Optical Polarimeter)-South, to be mounted on the 1m SAAO telescope in South Africa, is first of the two WALOP instruments currently under development for carrying out the PASIPHAE survey. Scheduled for commissioning…

Faraday tomography allows us to map diffuse polarized synchrotron emission from our Galaxy and use it to interpret the magnetic field in the interstellar medium (ISM). We have applied Faraday tomography to 60 observations from the LOFAR…

The technique of Faraday tomography is a key tool for the study of magnetised plasmas in the new era of broadband radio polarisation observations. In particular, observations at metre-wavelengths provide significantly better Faraday depth…

High Energy Astrophysical Phenomena · Physics 2018-12-03 Shane P. O'Sullivan , M. Brüggen , C. L. Van Eck , M. J. Hardcastle , M. Haverkorn , T. W. Shimwell , C. Tasse , V. Vacca , C. Horellou , G. Heald

The COSMOS HI Large Extragalactic Survey (CHILES) Continuum & Polarization (CHILES Con Pol) survey is an ultra-deep continuum imaging study of the COSMOS field conducted using the Karl G. Jansky Very Large Array. We obtained 1000 hours of…

COMPASS is an on-axis 2.6 meter telescope coupled to a correlation polarimeter operating at a wavelength of 1 cm. The entire instrument was built specifically for CMB polarization studies. We report here on observations of February 2001 -…

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