Tristan Pinsonneault-Marotte
A5034703948- Radio Astronomy Observations and Technology
- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Superconducting and THz Device Technology
- GNSS positioning and interference
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Methane Hydrates and Related Phenomena
- Solar and Space Plasma Dynamics
- Advanced Frequency and Time Standards
- Atmospheric and Environmental Gas Dynamics
- earthquake and tectonic studies
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Spacecraft and Cryogenic Technologies
- Seismic and Structural Analysis of Tall Buildings
- Quantum, superfluid, helium dynamics
- Vibration and Dynamic Analysis
- Particle Accelerators and Free-Electron Lasers
- Geomagnetism and Paleomagnetism Studies
- Nuclear Physics and Applications
- Satellite Communication Systems
- Ionosphere and magnetosphere dynamics
University of British Columbia
2017-2025
McGill University
2016
We report on the discovery of eight repeating fast radio burst (FRB) sources found using Canadian Hydrogen Intensity Mapping Experiment (CHIME) telescope. These span a dispersion measure (DM) range 103.5 to 1281 pc cm$^{-3}$. They display varying degrees activity: six were detected twice, another three times, and one ten times. FRBs likely represent bright and/or high-rate end distribution infrequently sources. For all sources, we determine sky coordinates with uncertainties...
We present a catalog of 536 fast radio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project between 400 and 800 MHz from 2018 July 25 to 2019 1, including 62 18 previously reported repeating sources. The represents first large sample, repeaters non-repeaters, observed in single survey with uniform selection effects. This facilitates comparative absolute studies FRB population. show that apparent non-repeaters have sky locations...
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a drift scan radio telescope operating across the 400-800 MHz band. CHIME located at Dominion Radio Astrophysical Observatory near Penticton, BC Canada. instrument designed to map neutral hydrogen over redshift range 0.8 2.5 constrain expansion history of Universe. This goal drives design features instrument. consists four parallel cylindrical reflectors, oriented north-south, each 100 m $\times$ 20 and outfitted with 256 element...
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 construct maps which foreground filtered stacked on angular spectral locations luminous red galaxies (LRG), line (ELG), quasars (QSO) eBOSS clustering catalogs. find decisive evidence for when stacking all three tracers LSS, logarithm Bayes Factor equal 18.9 10.8...
Abstract The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a novel transit radio telescope operating across the 400–800 MHz band. CHIME composed of four 20 m × 100 semicylindrical paraboloid reflectors, each which has 256 dual-polarization feeds suspended along its axis, giving it ≳200 deg 2 field view. This, combined with wide bandwidth, high sensitivity, and powerful correlator, makes an excellent instrument for detection fast bursts (FRBs). Fast Radio Burst Project (CHIME/FRB)...
Abstract Localizing fast radio bursts (FRBs) to their host galaxies is an essential step better understanding origins and using them as cosmic probes. The Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB Outriggers program aims add very long baseline interferometry localization capabilities CHIME, such that FRBs may be localized tens of milliarcsecond precision at the time discovery, more than sufficient for galaxy identification. first-built outrigger telescope Outrigger (KKO),...
Abstract We report the detection of 21 cm emission at an average redshift <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover accent="true"> <mml:mrow> <mml:mi>z</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> <mml:mo>=</mml:mo> <mml:mn>2.3</mml:mn> </mml:math> in cross-correlation data from Canadian Hydrogen Intensity Mapping Experiment (CHIME) with measurements Ly α forest eBOSS. Data collected by CHIME over 88 days 400–500 MHz frequency band (1.8...
We present an overview of the ‘ICE’ hardware and software framework that implements large arrays interconnected field-programmable gate array (FPGA)-based data acquisition, signal processing networking nodes economically. The system was conceived for application to radio, millimeter sub-millimeter telescope readout systems have requirements beyond typical off-the-shelf systems, such as careful control interference signals produced by digital electronics, clocking all elements in from a...
We present results from a new incoherent-beam Fast Radio Burst (FRB) search on the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder. Its large instantaneous field of view (FoV) and relative thermal insensitivity allow us to probe ultra-bright tail FRB distribution, test recent claim that this distribution's slope, $\alpha\equiv-\frac{\partial \log N}{\partial S}$, is quite small. A 256-input incoherent beamformer was deployed CHIME Pathfinder for purpose. If distribution...
We present a beam pattern measurement of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) made using Sun as calibration source. As CHIME is pure drift scan instrument, we rely on seasonal North-South motion to probe at different elevations. This semiannual range in elevation, combined with radio brightness Sun, enables which spans ~7,200 square degrees sky without need move telescope. take advantage observations near solar minimum minimize impact variability, observed be <10%...
We present the design, implementation and performance of a digital backend constructed for Canadian Hydrogen Intensity Mapping Experiment (CHIME) that uses accelerated computing to observe radio pulsars transient sources. When operating, CHIME correlator outputs 10 independent streams beamformed data CHIME/Pulsar digitally track specified celestial positions. Each these are processed by system which can coherently dedisperse, in real-time, up dispersion measure values 2500 pc/cm$^{-3}$ . The...
Abstract We present the first results of holographic beam-mapping program for Canadian Hydrogen Intensity Mapping Experiment (CHIME). describe implementation a technique as adapted CHIME, and introduce processing pipeline which prepares raw timestreams analysis beam features. use data from six bright sources across full 400–800 MHz observing band CHIME to provide measurements copolar cross-polar response in both amplitude phase all 1024 dual-polarized feeds array. In addition, we comparisons...
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 construct maps which foreground filtered stacked on angular spectral locations luminous red galaxies (LRG), line (ELG), quasars (QSO) eBOSS clustering catalogs. find decisive evidence for when stacking all three tracers LSS, logarithm Bayes Factor equal 18.9 10.8...
We present an overview of the 'ICE' hardware and software framework that implements large arrays interconnected FPGA-based data acquisition, signal processing networking nodes economically. The system was conceived for application to radio, millimeter sub-millimeter telescope readout systems have requirements beyond typical off-the-shelf systems, such as careful control interference signals produced by digital electronics, clocking all elements in from a single precise observatory-derived...
Localizing fast radio bursts (FRBs) to their host galaxies is an essential step better understanding origins and using them as cosmic probes. The CHIME/FRB Outrigger program aims add VLBI-localization capabilities CHIME, such that FRBs may be localized tens of milliarcsecond precision at the time discovery, more than sufficient for galaxy identification. first-built outrigger telescope KKO, located 66 kilometers west CHIME. Cross-correlating KKO with CHIME can achieve arcsecond-scale...
A direct consequence of Faraday rotation is that the polarized radio sky does not resemble total intensity at long wavelengths. We analyze G137+7, which undetectable in but appears as a depolarization feature. use first polarization maps from Canadian Hydrogen Intensity Mapping Experiment. Our $400-729$ MHz bandwidth and angular resolution, $17'$ to $30'$, allow us synthesis structure. In angle maps, we find "tail" extending $10^\circ$ "head" designate combined object "tadpole". Similar...
The Simons Observatory is a new ground-based cosmic microwave background experiment, which currently being commissioned in Chile's Atacama Desert. During its survey, the observatory's small aperture telescopes will map 10% of sky bands centered at frequencies ranging from 27 to 280 GHz constrain inflation models, and large telescope 40% same cosmological parameters use weak lensing study large-scale structure. To achieve these science goals, deploying telescopes' receivers with 60,000...