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We report on a full-polarization analysis of the first 25 as yet non-repeating FRBs detected at 1.4 GHz by the 110-antenna Deep Synoptic Array (DSA-110) during commissioning observations. We present details of the data-reduction,…

We present a polarization catalog of 533 extragalactic radio sources with 2.3 GHz total intensity above 420 mJy from the S-band Polarization All Sky Survey, S-PASS, with corresponding 1.4 GHz polarization information from the NRAO VLA Sky…

Astrophysics of Galaxies · Physics 2016-09-21 Mehdi Lamee , Lawrence Rudnick , Jamie S. Farnes , Ettore Carretti , B. M. Gaensler , Marijke Haverkorn , Sergio Poppi

We present the first deep polarimetric study of Galactic synchrotron emission at low radio frequencies. Our study is based on 21 observations of the European Large Area Infrared Space Observatory Survey-North 1 (ELAIS-N1) field using the…

Polarimetric observations of Fast Radio Bursts (FRBs) are a powerful resource for better understanding these mysterious sources by directly probing the emission mechanism of the source and the magneto-ionic properties of its environment. We…

A fully analytic statistical formalism does not yet exist to describe radio-wavelength measurements of linearly polarized intensity that are produced using rotation measure synthesis. In this work we extend the analytic formalism for…

Instrumentation and Methods for Astrophysics · Physics 2015-06-05 Christopher A. Hales , Bryan M. Gaensler , Ray P. Norris , Enno Middelberg

We have observed 37 bright, polarized radio sources with the Allen Telescope Array (ATA) to present a novel analysis of their Faraday rotation properties. Each source was observed during the commissioning phase with 2 to 4 100-MHz bands at…

We present a comprehensive radio polarization study of the Perseus molecular cloud using wideband L-band observations from the Karl G. Jansky Very Large Array. Our survey covers $\sim13.8$~deg$^2$ with a mean Stokes~$I$ sensitivity of…

Astrophysics of Galaxies · Physics 2026-02-23 Haleh Hajizadeh , Jeroen Stil , René Plume , Mehrnoosh Tahani , Preshanth Jagannathan

We present stacking polarized intensity as a means to study the polarization of sources that are too faint to be detected individually in surveys of polarized radio sources. Stacking offers not only high sensitivity to the median signal of…

Astrophysics of Galaxies · Physics 2015-06-19 J. M. Stil , B. W. Keller , S. J. George , A. R. Taylor

We have conducted a deep survey (with a central rms of $55\mu\textrm{Jy}$) with the LOw Frequency ARray (LOFAR) at 120-168 MHz of the Bo\"otes field, with an angular resolution of $3.98^{''}\times6.45^{''}$, and obtained a sample of 10091…

The grand-design spiral galaxy M51 was observed with the LOFAR High Frequency Antennas (HBA) and imaged in total intensity and polarisation. This observation covered the frequencies between 115 MHz and 175 MHz. We produced an image of total…

We present the largest ever sample of radio polarization properties for $z>4$ sources, with 14 sources having significant polarization detections. Using wideband data from the Karl G. Jansky Very Large Array, we obtained the rest-frame…

Astrophysics of Galaxies · Physics 2018-02-07 Tessa Vernstrom , Bryan Gaensler , Valentina Vacca , Jamie Farnes , Marijke Haverkorn , Shane O'Sullivan

We present polarization measurements of extragalactic radio sources observed during the Cosmic Microwave Background polarization survey of the Q/U Imaging Experiment (QUIET), operating at 43 GHz (Q-band) and 95 GHz (W-band). We examine…

It has been well established that galaxy clusters have magnetic fields. The exact properties and origin of these magnetic fields are still uncertain even though these fields play a key role in many astrophysical processes. Various attempts…

Cosmology and Nongalactic Astrophysics · Physics 2022-09-21 E. Osinga , R. J. van Weeren , F. Andrade-Santos , L. Rudnick , A. Bonafede , T. Clarke , K. Duncan , S. Giacintucci , Tony Mroczkowski , H. J. A. Röttgering

This study aims to characterise the polarized foreground emission in the ELAIS-N1 field and to address its possible implications for the extraction of the cosmological 21-cm signal from the Low-Frequency Array - Epoch of Reionization…

Astrophysics of Galaxies · Physics 2014-09-05 V. Jelic , A. G. de Bruyn , M. Mevius , F. B. Abdalla , K. M. B. Asad , G. Bernardi , M. A. Brentjens , S. Bus , E. Chapman , B. Ciardi , S. Daiboo , E. R. Fernandez , A. Ghosh , G. Harker , H. Jensen , S. Kazemi , L. V. E. Koopmans , P. Labropoulos , O. Martinez-Rubi , G. Mellema , A. R. Offringa , V. N. Pandey , A. H. Patil , R. M. Thomas , H. K. Vedantham , V. Veligatla , S. Yatawatta , S. Zaroubi , A. Alexov , J. Anderson , I. M. Avruch , R. Beck , M. E. Bell , M. J. Bentum , P. Best , A. Bonafede , J. Bregman , F. Breitling , J. Broderick , W. N. Brouw , M. Bruggen , H. R. Butcher , J. E. Conway , F. de Gasperin , E. de Geus , A. Deller , R. -J. Dettmar , S. Duscha , J. Eisloffel , D. Engels , H. Falcke , R. A. Fallows , R. Fender , C. Ferrari , W. Frieswijk , M. A. Garrett , J. Griessmeier , A. W. Gunst , J. P. Hamaker , T. E. Hassall , M. Haverkorn , G. Heald , J. W. T. Hessels , M. Hoeft , J. Horandel , A. Horneffer , A. van der Horst , M. Iacobelli , E. Juette , A. Karastergiou , V. I. Kondratiev , M. Kramer , M. Kuniyoshi , G. Kuper , J. van Leeuwen , P. Maat , G. Mann , D. McKay-Bukowski , J. P. McKean , H. Munk , A. Nelles , M. J. Norden , H. Paas , M. Pandey-Pommier , G. Pietka , R. Pizzo , A. G. Polatidis , W. Reich , H. Rottgering , A. Rowlinson , A. M. M. Scaife , D. Schwarz , M. Serylak , O. Smirnov , M. Steinmetz , A. Stewart , M. Tagger , Y. Tang , C. Tasse , S. ter Veen , S. Thoudam , C. Toribio , R. Vermeulen , C. Vocks , R. J. van Weeren , R. A. M. J. Wijers , S. J. Wijnholds , O. Wucknitz , P. Zarka

Calibration of instrumental polarization is critical for measuring polarized radio emissions from astrophysical sources to extract the magnetic field information in astrophysical, heliospheric, and terrestrial plasmas. At meter wavelengths,…

Instrumentation and Methods for Astrophysics · Physics 2025-05-08 Devojyoti Kansabanik , Angelos Vourlidas , Soham Dey , Surajit Mondal , Divya Oberoi

We determined Faraday rotation measures (RMs) towards 137 pulsars in the northern sky, using Low-Frequency Array (LOFAR) observations at 110-190 MHz. This low-frequency RM catalogue, the largest to date, improves the precision of existing…

We report on full-Stokes L-band observations of 98 MeerKAT calibration sources. Linear polarization is detected in 71 objects above a fractional level of 0.2\%. We identify ten sources with strong fractional linear polarization and low…

Astrophysics of Galaxies · Physics 2024-05-24 A. R. Taylor , L. S. Legodi

Aims. An efficient means of locating calibrator sources for International LOFAR is developed and used to determine the average density of usable calibrator sources on the sky for subarcsecond observations at 140 MHz. Methods. We used the…

Faraday rotation measures (RMs) have been used for many studies of cosmic magnetism, and in most cases having more RMs is beneficial for those studies. This has lead to development of RM surveys that have produced large catalogs, as well as…

Aims. With the recent preliminary release of the LOFAR LBA Sky Survey (LoLSS), the first wide-area, ultra-low frequency observations from LOFAR were published. Our aim is to combine this data set with other surveys at higher frequencies to…

Instrumentation and Methods for Astrophysics · Physics 2023-06-22 Lukas Böhme , Dominik J. Schwarz , Francesco de Gasperin , Huub J. A. Röttgering , Wendy L. Williams