Anna Ordog
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View article: GMIMS-DRAGONS: A Faraday Depth Survey of the Northern Sky Covering 350 to 1030 MHz
GMIMS-DRAGONS: A Faraday Depth Survey of the Northern Sky Covering 350 to 1030 MHz Open
Polarized synchrotron emission at meter to centimeter wavelengths provides an effective tracer of the Galactic magnetic field. Calculating Faraday depth, the most useful parameter for mapping the line-of-sight magnetic field, requires obse…
View article: A new window into the sub-parsec scale magnetic field in the Milky Way? Unveiling small-scale magneto-ionic structures with Faraday complexity
A new window into the sub-parsec scale magnetic field in the Milky Way? Unveiling small-scale magneto-ionic structures with Faraday complexity Open
Radio broad-band spectro-polarimetric observations are sensitive to the spatial fluctuations of the Faraday depth (FD) within the telescope beam. Such FD fluctuations are referred to as ‘Faraday complexity’, and can unveil small-scale magn…
View article: A Pioneering Experiment Combining Single-antenna and Aperture-synthesis Data to Measure Faraday Rotation with GMIMS and the CGPS
A Pioneering Experiment Combining Single-antenna and Aperture-synthesis Data to Measure Faraday Rotation with GMIMS and the CGPS Open
Structures in the magnetoionic medium exist across a wide range of angular sizes owing to large-scale magnetic fields coherent over the Galactic spiral arms combined with small-scale fluctuations in the magnetic field and electron density …
View article: Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured With a Drone
Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured With a Drone Open
We present beam measurements of the CHIME telescope using a radio calibration source deployed on a drone payload. During test flights, the pulsing calibration source and the telescope were synchronized to GPS time, enabling in-situ backgro…
View article: A pioneering experiment combining single-antenna and aperture-synthesis data to measure Faraday rotation with GMIMS and the CGPS
A pioneering experiment combining single-antenna and aperture-synthesis data to measure Faraday rotation with GMIMS and the CGPS Open
Structures in the magnetoionic medium exist across a wide range of angular sizes owing to large-scale magnetic fields coherent over the Galactic spiral arms combined with small-scale fluctuations in the magnetic field and electron density …
View article: Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME)
Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Open
We present the first results of the holographic beam-mapping program for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). We describe the implementation of a holographic technique as adapted for CHIME, and introduce the processi…
View article: Do All Fast Radio Bursts Repeat? Constraints from CHIME/FRB Far Sidelobe FRBs
Do All Fast Radio Bursts Repeat? Constraints from CHIME/FRB Far Sidelobe FRBs Open
We report 10 fast radio bursts (FRBs) detected in the far sidelobe region (i.e., ≥5° off-meridian) of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) from August 28 2018 to August 31 2021. We localize the bursts by fitting their…
View article: Faraday Tomography with CHIME: The “Tadpole” Feature G137+7
Faraday Tomography with CHIME: The “Tadpole” Feature G137+7 Open
A direct consequence of Faraday rotation is that the polarized radio sky does not resemble the total intensity sky at long wavelengths. We analyze G137+7, which is undetectable in total intensity but appears as a depolarization feature. We…
View article: Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME)
Holographic Beam Measurements of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Open
We present the first results of the holographic beam mapping program for the Canadian Hydrogen Intensity Mapping Experiment (CHIME). We describe the implementation of the holographic technique as adapted for CHIME, and introduce the proces…
View article: Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured with a Drone
Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured with a Drone Open
We present beam measurements of the CHIME telescope using a radio calibration source deployed on a drone payload. During test flights, the pulsing calibration source and the telescope were synchronized to GPS time, enabling in-situ backgro…
View article: Faraday moments of the Southern Twenty-centimeter All-sky Polarization Survey (STAPS)
Faraday moments of the Southern Twenty-centimeter All-sky Polarization Survey (STAPS) Open
Context. Faraday tomography of broadband radio polarization surveys enables us to study magnetic fields and their interaction with the interstellar medium (ISM). Such surveys include the Global Magneto-Ionic Medium Survey (GMIMS), which co…
View article: Faraday moments of the Southern Twenty-centimeter All-sky Polarization Survey (STAPS)
Faraday moments of the Southern Twenty-centimeter All-sky Polarization Survey (STAPS) Open
Faraday tomography of broadband radio polarization surveys enables us to study magnetic fields and their interaction with the interstellar medium (ISM). Such surveys include the Global Magneto-Ionic Medium Survey (GMIMS), which covers the …
View article: Faraday tomography with CHIME: the `tadpole' feature G137+7
Faraday tomography with CHIME: the `tadpole' feature G137+7 Open
A direct consequence of Faraday rotation is that the polarized radio sky does not resemble the total intensity sky at long wavelengths. We analyze G137+7, which is undetectable in total intensity but appears as a depolarization feature. We…
View article: A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyα Forest
A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyα Forest Open
We report the detection of 21 cm emission at an average redshift in the cross-correlation of data from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) with measurements of the Ly α forest from eBOSS. Data collected by CH…
View article: A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyman-$α$ Forest
A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyman-$α$ Forest Open
We report the detection of 21 cm emission at an average redshift $\bar{z} = 2.3$ in the cross-correlation of data from the Canadian Hydrogen Intensity Mapping Experiment (CHIME) with measurements of the Lyman-$α$ forest from eBOSS. Data co…
View article: Constraints on the Intergalactic and Local Dispersion Measure of Fast Radio Bursts with the CHIME/FRB far side-lobe events
Constraints on the Intergalactic and Local Dispersion Measure of Fast Radio Bursts with the CHIME/FRB far side-lobe events Open
We study the 10 fast radio bursts (FRBs) detected in the far side-lobe region of the CHIME telescope from 2018 August 28 to 2021 August 31. We find that the far side-lobe events have on average $\sim$500 times greater fluxes than events de…
View article: Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment Open
We present a detection of 21 cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment. Radio observations acquired over 102 nights are used to construct maps t…
View article: Structure in the Magnetic Field of the Milky Way Disk and Halo Traced by Faraday Rotation
Structure in the Magnetic Field of the Milky Way Disk and Halo Traced by Faraday Rotation Open
Magnetic fields in the ionized medium of the disk and halo of the Milky Way impose Faraday rotation on linearly polarized radio emission. We compare two surveys mapping the Galactic Faraday rotation, one showing the rotation measures of ex…
View article: An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment
An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment Open
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a drift scan radio telescope operating across the 400–800 MHz band. CHIME is located at the Dominion Radio Astrophysical Observatory near Penticton, BC, Canada. The instrument i…
View article: Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment
Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment Open
We present a beam pattern measurement of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) made using the Sun as a calibration source. As CHIME is a pure drift-scan instrument, we rely on the seasonal north–south motion of the Sun…
View article: Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment
Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment Open
We present a detection of 21-cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Radio observations acquired over 102 nights are used to construc…
View article: Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment
Using the Sun to Measure the Primary Beam Response of the Canadian Hydrogen Intensity Mapping Experiment Open
We present a beam pattern measurement of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) made using the Sun as a calibration source. As CHIME is a pure drift scan instrument, we rely on the seasonal North-South motion of the Sun…
View article: Erratum “The Global Magneto-Ionic Medium Survey: A Faraday Depth Survey of the Northern Sky Covering 1280–1750 MHz” (2021, AJ, 162, 35)
Erratum “The Global Magneto-Ionic Medium Survey: A Faraday Depth Survey of the Northern Sky Covering 1280–1750 MHz” (2021, AJ, 162, 35) Open
\n Contains fulltext :\n 237995.pdf (Publisher’s version ) (Open Access)\n
View article: Sub-second periodicity in a fast radio burst
Sub-second periodicity in a fast radio burst Open
The origin of fast radio bursts (FRBs), millisecond-duration flashes of radio waves that are visible at distances of billions of light-years, remains an open astrophysical question. Here we report the detection of the multi-component FRB 2…
View article: The Global Magneto-Ionic Medium Survey (GMIMS): the brightest polarized region in the southern sky at 75 cm and its implications for Radio Loop II
The Global Magneto-Ionic Medium Survey (GMIMS): the brightest polarized region in the southern sky at 75 cm and its implications for Radio Loop II Open
Using the Global Magneto-Ionic Medium Survey (GMIMS) Low-Band South (LBS) southern sky polarization survey, covering 300–480 MHz at 81 arcmin resolution, we reveal the brightest region in the southern polarized sky at these frequencies. Th…
View article: Revisiting Rotation Measures from the Canadian Galactic Plane Survey: the Magnetic Field in the Disk of the Outer Galaxy
Revisiting Rotation Measures from the Canadian Galactic Plane Survey: the Magnetic Field in the Disk of the Outer Galaxy Open
Faraday rotation provides a valuable tracer of magnetic fields in the interstellar medium; catalogs of Faraday rotation measures provide key observations for studies of the Galactic magnetic field. We present a new catalog of rotation meas…
View article: Deciphering Galactic Magnetism from Polarisation Structures in the Northern Sky
Deciphering Galactic Magnetism from Polarisation Structures in the Northern Sky Open
The Milky Way is permeated by magnetic fields ranging from stellar scales up to coherence lengths comparable to the Galactic spiral arms. Determining the Galactic magnetic field (GMF) morphology over a range of spatial scales is necessary …
View article: The complex large-scale magnetic fields in the first Galactic quadrant as revealed by the Faraday depth profile disparity
The complex large-scale magnetic fields in the first Galactic quadrant as revealed by the Faraday depth profile disparity Open
The Milky Way is one of the very few spiral galaxies known to host large-scale magnetic field reversals. The existence of the field reversal in the first Galactic quadrant near the Sagittarius spiral arm has been well established, yet poor…
View article: Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field
Faraday Rotation of Extended Emission as a Probe of the Large-Scale Galactic Magnetic Field Open
The Galactic magnetic field is an integral constituent of the interstellar medium (ISM), and knowledge of its structure is crucial to understanding Galactic dynamics. The Rotation Measures (RM) of extragalactic (EG) sources have been the b…
View article: Faraday Rotation of Extended Emission as a Probe of the Large-Scale\n Galactic Magnetic Field
Faraday Rotation of Extended Emission as a Probe of the Large-Scale\n Galactic Magnetic Field Open
The Galactic magnetic field is an integral constituent of the interstellar\nmedium (ISM), and knowledge of its structure is crucial to understanding\nGalactic dynamics. The Rotation Measures (RM) of extragalactic (EG) sources\nhave been th…