Explanipedia

CHIME/FRB Outriggers: Design Overview Open

M. Amiri, Bridget C. Andersen, Shion Andrew, Kevin Bandura, Mohit Bhardwaj , et al. · 2025

The Canadian Hydrogen Intensity Mapping Experiment (CHIME) has emerged as the world’s premier facility for studying fast radio bursts (FRBs) through its fast transient search backend CHIME/FRB. The CHIME/FRB Outriggers project will augment…

Stellar Mass–Dispersion Measure Correlations Constrain Baryonic Feedback in Fast Radio Burst Host Galaxies Open

Calvin Leung, Sunil Simha, Isabel Medlock, Daisuke Nagai, Kiyoshi W. Masui , et al. · 2025

Low-redshift fast radio bursts (FRBs) enable robust measurements of the host galaxy contribution to the dispersion measure (DM), offering valuable constraints on the circumgalactic medium (CGM) of FRB hosts. We curate a sample of 20 nearby…

FRB 20250316A: A Brilliant and Nearby One-off Fast Radio Burst Localized to 13 pc Precision Open

Thomas C. Abbott, Daniel Amouyal, Bridget C. Andersen, Shion Andrew, Kevin Bandura , et al. · 2025

Precise localizations of a small number of repeating fast radio bursts (FRBs) using very long baseline interferometry (VLBI) have enabled multiwavelength follow-up observations revealing diverse local environments. However, the 2%–3% of FR…

A Catalog of Local Universe Fast Radio Bursts from CHIME/FRB and the KKO Open

M. Amiri, Daniel Amouyal, Bridget C. Andersen, Shion Andrew, Kevin Bandura , et al. · 2025

We present the first catalog of fast radio burst (FRB) host galaxies from CHIME/FRB Outriggers, selected uniformly in the radio and the optical by localizing 81 new bursts to 2″ × ∼ 60″ accuracy using CHIME and the k’niʔatn k’l ⌣ stk’masqt…

Stellar Mass-Dispersion Measure Correlations Constrain Baryonic Feedback in Fast Radio Burst Host Galaxies Open

Calvin Leung, Sunil Simha, Isabel Medlock, Daisuke Nagai, Kiyoshi W. Masui , et al. · 2025

Low redshift fast radio bursts (FRBs) provide robust measurements of the host-galaxy contribution to the dispersion measure (DM), which can constrain the circumgalactic medium (CGM) of the hosts. We curate a sample of 20 nearby FRBs with l…

FRB 20250316A: A Brilliant and Nearby One-Off Fast Radio Burst Localized to 13 parsec Precision Open

FRB Collaboration, Thomas C. Abbott, Daniel Amouyal, Shion Andrew, Kevin Bandura , et al. · 2025

Precise localizations of a small number of repeating fast radio bursts (FRBs) using very long baseline interferometry (VLBI) have enabled multiwavelength follow-up observations revealing diverse local environments. However, the 2--3\% of F…

Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured With a Drone Open

Will Tyndall, Alex Reda, J. Richard Shaw, Kevin Bandura, Arnab Chakraborty , et al. · 2025

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…

A Very Long Baseline Interferometry Calibrator Grid at 600 MHz for Fast Radio Transient Localizations with CHIME/FRB Outriggers Open

Shion Andrew, Calvin Leung, Alexander Li, Kiyoshi W. Masui, Bridget C. Andersen , et al. · 2025

The Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project has a new very long baseline interferometry (VLBI) Outrigger at the Green Bank Observatory (GBO), which forms a 3300 km baseline with CHIME operating a…

A Catalog of Local Universe Fast Radio Bursts from CHIME/FRB and the KKO Outrigger Open

M. Amiri, Daniel Amouyal, Bridget C. Andersen, Shion Andrew, Kevin Bandura , et al. · 2025

We present the first catalog of fast radio burst (FRB) host galaxies from CHIME/FRB Outriggers, selected uniformly in the radio and the optical by localizing 81 new bursts to 2'' x ~60'' accuracy using CHIME and the KKO Outrigger, located …

Do All Fast Radio Bursts Repeat? Constraints from CHIME/FRB Far Sidelobe FRBs Open

Hsiu-Hsien Lin, Paul Scholz, Cherry Ng, Ue‐Li Pen, Mohit Bhardwaj , et al. · 2024

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…

A VLBI Calibrator Grid at 600MHz for Fast Radio Transient Localizations with CHIME/FRB Outriggers Open

Shion Andrew, Calvin Leung, An Li, Kiyoshi W. Masui, Bridget C. Andersen , et al. · 2024

The Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project has a new VLBI Outrigger at the Green Bank Observatory (GBO), which forms a 3300km baseline with CHIME operating at 400-800MHz. Using 100ms long full-a…

Demonstration of hybrid foreground removal on CHIME data Open

Haochen Wang, Kiyoshi W. Masui, Kevin Bandura, Arnab Chakraborty, M. Dobbs , et al. · 2024

The main challenge of 21 cm cosmology experiments is astrophysical foregrounds which are difficult to separate from the signal due to telescope systematics. An earlier study has shown that foreground residuals induced by antenna gain error…

Interference detection in radio astronomy applying Shapiro-Wilks normality test, spectral entropy, and spectral relative entropy Open

Zhicheng Cao, Natalia A. Schmid, Kevin Bandura, D. R. Lorimer, Morgan Dameron , et al. · 2024

Radio-frequency interference (RFI) is becoming an increasingly significant problem for most radio telescopes. Working with Green Bank Telescope data from PSR J1730+0747 in the form of complex-valued channelized voltages and their respectiv…

CHIME/FRB Outriggers: KKO Station System and Commissioning Results Open

Adam Lanman, Shion Andrew, Mattias Lazda, Vishwangi Shah, M. Amiri , et al. · 2024

Localizing fast radio bursts (FRBs) to their host galaxies is an essential step to better understanding their origins and using them as cosmic probes. The Canadian Hydrogen Intensity Mapping Experiment (CHIME)/FRB Outriggers program aims t…

Beam Maps of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) Measured with a Drone Open

Will Tyndall, Alex Reda, J. Richard Shaw, Kevin Bandura, Arnab Chakraborty , et al. · 2024

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…

Updating the First CHIME/FRB Catalog of Fast Radio Bursts with Baseband Data Open

M. Amiri, Bridget C. Andersen, Shion Andrew, Kevin Bandura, Mohit Bhardwaj , et al. · 2024

In 2021, a catalog of 536 fast radio bursts (FRBs) detected with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope was released by the CHIME/FRB Collaboration. This large collection of bursts, observed with a singl…

A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyα Forest Open

M. Amiri, Kevin Bandura, Arnab Chakraborty, M. Dobbs, Mateus Fandino , et al. · 2024

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…

A pulsar-like swing in the polarisation position angle of a nearby fast radio burst Open

Ryan Mckinven, Mohit Bhardwaj, T. Eftekhari, C. D. Kilpatrick, A. Yu. Kirichenko , et al. · 2024

Fast radio bursts (FRBs) last for milliseconds and arrive at Earth from cosmological distances. While their origin(s) and emission mechanism(s) are presently unknown, their signals bear similarities with the much less luminous radio emissi…

A pulsar-like swing in the polarisation position angle of a nearby fast radio burst Open

Ryan Mckinven, Mohit Bhardwaj, T. Eftekhari, C. D. Kilpatrick, A. Yu. Kirichenko , et al. · 2024

Fast radio bursts (FRBs) last for milliseconds and arrive at Earth from cosmological distances. While their origin(s) and emission mechanism(s) are presently unknown, their signals bear similarities with the much less luminous radio emissi…

CHIME/FRB Outriggers: KKO Station System and Commissioning Results Open

Adam Lanman, Shion Andrew, Mattias Lazda, Vishwangi Shah, M. Amiri , et al. · 2024

Localizing fast radio bursts (FRBs) to their host galaxies is an essential step to better understanding their origins and using them as cosmic probes. The CHIME/FRB Outrigger program aims to add VLBI-localization capabilities to CHIME, suc…

Interference detection in radio astronomy: applying Shapiro–Wilks normality test, spectral entropy, and spectral relative entropy Open

Zhicheng Cao, Natalia A. Schmid, Kevin Bandura, D. R. Lorimer, Morgan Dameron , et al. · 2024

Radio-frequency interference (RFI) is becoming an increasingly significant problem for most radio telescopes. Working with Green Bank Telescope data from PSR J1730+0747 in the form of complex-valued channelized voltages and their respectiv…

Updating the first CHIME/FRB catalog of fast radio bursts with baseband data Open

The CHIME FRB Collaboration, NULL AUTHOR_ID, M. Amiri, Bridget C. Andersen, Shion Andrew , et al. · 2023

In 2021, a catalog of 536 fast radio bursts (FRBs) detected with the Canadian Hydrogen Intensity Mapping Experiment (CHIME) radio telescope was released by the CHIME/FRB Collaboration. This large collection of bursts, observed with a singl…

A Detection of Cosmological 21 cm Emission from CHIME in Cross-correlation with eBOSS Measurements of the Lyman-$α$ Forest Open

CHIME Collaboration, M. Amiri, Kevin Bandura, Arnab Chakraborty, M. Dobbs , et al. · 2023

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…

A fast radio burst localized at detection to an edge-on galaxy using very-long-baseline interferometry Open

Tomás Cassanelli, Calvin Leung, Pranav Sanghavi, Juan Mena-Parra, Savannah Cary , et al. · 2023

Fast radio bursts (FRBs) are millisecond-duration, luminous radio transients of extragalactic origin. These events have been used to trace the baryonic structure of the Universe using their dispersion measure (DM) assuming that the contrib…

Constraints on the Intergalactic and Local Dispersion Measure of Fast Radio Bursts with the CHIME/FRB far side-lobe events Open

Hsiu-Hsien Lin, Paul Scholz, Cherry Ng, Ue‐Li Pen, Dongzi Li , et al. · 2023

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…

Do All Fast Radio Bursts Repeat? Constraints from CHIME/FRB Far Side-Lobe FRBs Open

Hsiu-Hsien Lin, Paul Scholz, Cherry Ng, Ue‐Li Pen, Mohit Bhardwaj , et al. · 2023

We report ten fast radio bursts (FRBs) detected in the far side-lobe region (i.e., $\geq 5^\circ$ off-meridian) of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) from 2018 August 28 to 2021 August 31. We localize the bursts by …

TONE: A CHIME/FRB Outrigger Pathfinder for localizations of Fast Radio Bursts using Very Long Baseline Interferometry Open

Pranav Sanghavi, Calvin Leung, Kevin Bandura, Tomás Cassanelli, Jane Kaczmarek , et al. · 2023

The sensitivity and field of view of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) has enabled its fast radio burst (FRB) backend to detect thousands of FRBs. However, the low angular resolution of CHIME prevents it from local…

CHIME/FRB Discovery of 25 Repeating Fast Radio Burst Sources Open

The CHIME FRB Collaboration, Bridget C. Andersen, Kevin Bandura, Mohit Bhardwaj, P. J. Boyle , et al. · 2023

We present the discovery of 25 new repeating fast radio burst (FRB) sources found among CHIME/FRB events detected between 2019 September 30 and 2021 May 1. The sources were found using a new clustering algorithm that looks for multiple eve…

Detection of Cosmological 21 cm Emission with the Canadian Hydrogen Intensity Mapping Experiment Open

M. Amiri, Kevin Bandura, Tianyue Chen, Meiling Deng, M. Dobbs , et al. · 2023

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…

Erratum: “The First CHIME/FRB Fast Radio Burst Catalog” (2021, ApJS, 257, 59) Open

The CHIME FRB Collaboration, M. Amiri, Bridget C. Andersen, Kevin Bandura, Sabrina Berger , et al. · 2023

Kevin Bandura YOU? Author Swipe