Publications (35)
Constraining the mass of the M31 ionized baryon Halo using CHIME/FRB Catalog 2
Lordrick A. Kahinga, J. Xavier Prochaska, Sunil Simha +21
The circumgalactic medium (CGM) surrounding galaxies is believed to be a significant reservoir of baryons, yet its total mass remains poorly constrained. We present a novel approac…
The host galaxies and progenitors of Fast Radio Bursts localized with the Australian Square Kilometre Array Pathfinder
Shivani Bhandari, Elaine M. Sadler, J. Xavier Prochaska +16
The Australian SKA Pathfinder (ASKAP) telescope has started to localize Fast Radio Bursts (FRBs) to arcsecond accuracy from the detection of a single pulse, allowing their host gal…
JWST and Ground-based Observations of the Type Iax Supernovae SN 2024pxl and SN 2024vjm: Evidence for Weak Deflagration Explosions
Lindsey A. Kwok, Mridweeka Singh, Saurabh W. Jha +89
We present panchromatic optical near-infrared (NIR) mid-infrared (MIR) observations of the intermediate-luminosity Type Iax supernova (SN Iax) 2024pxl and the extremely low…
Estimating the contribution of foreground halos to the FRB 180924 dispersion measure
Sunil Simha, Nicolas Tejos, J. Xavier Prochaska +6
Fast Radio Burst (FRB) dispersion measures (DMs) record the presence of ionized baryons that are otherwise invisible to other techniques enabling resolution of the matter distribut…
A Deep and Wide Twilight Survey for Asteroids Interior to Earth and Venus
Scott S. Sheppard, David Tholen, Petr Pokorny +17
We are conducting a survey using twilight time on the Dark Energy Camera with the Blanco 4m telescope in Chile to look for objects interior to Earth's and Venus' orbits. To date we…
A Fast Radio Burst in a Compact Galaxy Group at ~1
Alexa C. Gordon, Wen-fai Fong, Sunil Simha +14
FRB 20220610A is a high-redshift Fast Radio Burst (FRB) that has not been observed to repeat. Here, we present rest-frame UV and optical observati…
A fast radio burst from the first 3 billion years of the Universe
Manisha Caleb, Themiya Nanayakkara, Benjamin Stappers +25
Fast radio bursts (FRBs) are enigmatic millisecond-duration signals which encode otherwise unattainable information on the plasma which permeates our Universe, providing insights i…
FLIMFLAM DR1: The First Constraints on the Cosmic Baryon Distribution from 8 FRB sightlines
Ilya S. Khrykin, Metin Ata, Khee-Gan Lee +15
The dispersion measure of fast radio bursts (FRBs), arising from the interactions of the pulses with free electrons along the propagation path, constitutes a unique probe of the co…
A Decade to Map the Diffuse Universe: FRB-QSO Pairs with HST/COS Spectroscopy
Jessica Werk, Matthew McQuinn, J. Xavier Prochaska +16
Jointly analyzing the sightlines of arcsecond-localized fast radio bursts (FRBs) and UV-bright quasars (QSOs) nearby in projection has the potential to provide strong constraints o…
Mapping Obscured Star Formation in the Host Galaxy of FRB 20201124A
Yuxin Dong, Tarraneh Eftekhari, Wen-fai Fong +23
We present high-resolution 1.5 6 GHz Karl G. Jansky Very Large Array (VLA) and Hubble Space Telescope (HST) optical and infrared observations of the extremely active repeating…
Constraining Gas Mass Fractions in Galaxy Groups and Clusters with the First CHIME/FRB Outrigger
Adam E. Lanman, Sunil Simha, Kiyoshi W. Masui +16
In recent years, localized fast radio bursts (FRBs) have emerged as a powerful tool to study the structure of the baryonic matter in the universe. Their dispersion measures (DMs) s…
Stellar Mass-Dispersion Measure Correlations Constrain Baryonic Feedback in Fast Radio Burst Host Galaxies
Calvin Leung, Sunil Simha, Isabel Medlock +20
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…
Fast Radio Bursts as Probes of Magnetic Fields in Galaxies at z < 0.5
Alexandra G. Mannings, Rüdiger Pakmor, J. Xavier Prochaska +6
We present a sample of nine Fast Radio Bursts (FRBs) from which we derive magnetic field strengths of the host galaxies represented by normal, star-forming galaxies with st…
A non-repeating fast radio burst in a dwarf host galaxy
Shivani Bhandari, Alexa C. Gordon, Danica R. Scott +14
We present the discovery of as-of-yet non-repeating Fast Radio Burst (FRB), FRB 20210117A, with the Australian Square Kilometer Array Pathfinder (ASKAP) as a part of the Commensal…
FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping Survey: the First Data Release
Yuxin Huang, Sunil Simha, Ilya Khrykin +12
This paper presents the first public data release (DR1) of the FRB Line-of-sight Ionization Measurement From Lightcone AAOmega Mapping (FLIMFLAM) Survey, a wide field spectroscopic…
The Demographics, Stellar Populations, and Star Formation Histories of Fast Radio Burst Host Galaxies: Implications for the Progenitors
Alexa C. Gordon, Wen-fai Fong, Charles D. Kilpatrick +26
We present a comprehensive catalog of observations and stellar population properties for 23 highly secure host galaxies of fast radio bursts (FRBs). Our sample comprises six repeat…
Host Galaxy Properties and Offset Distributions of Fast Radio Bursts: Implications for their Progenitors
Kasper E. Heintz, J. Xavier Prochaska, Sunil Simha +15
We present observations and detailed characterizations of five new host galaxies of fast radio bursts (FRBs) discovered with the Australian Square Kilometre Array Pathfinder (ASKAP…
The low density and magnetization of a massive galaxy halo exposed by a fast radio burst
J. Xavier Prochaska, Jean-Pierre Macquart, Matthew McQuinn +16
Present-day galaxies are surrounded by cool and enriched halo gas extending to hundreds of kiloparsecs. This halo gas is thought to be the dominant reservoir of material available…
A High-Resolution View of Fast Radio Burst Host Environments
Alexandra G. Mannings, Wen-fai Fong, Sunil Simha +11
We present Hubble Space Telescope (HST/WFC3) ultraviolet and infrared observations of eight fast radio burst (FRB) host galaxies with sub-arcsecond localizations, including the hos…
A luminous fast radio burst that probes the Universe at redshift 1
Stuart D. Ryder, Keith W. Bannister, S. Bhandari +18
Fast radio bursts (FRBs) are millisecond-duration pulses of radio emission originating from extragalactic distances. Radio dispersion on each burst is imparted by intervening plasm…
Mapping the Spatial Distribution of Fast Radio Bursts within their Host Galaxies
Alexa C. Gordon, Wen-fai Fong, Adam T. Deller +23
We present deep optical and near-infrared observations of the host galaxies of 34 fast radio bursts (FRBs) detected by the Commensal Real-time ASKAP Fast Transient (CRAFT) survey o…
FRB 20250316A: A Brilliant and Nearby One-Off Fast Radio Burst Localized to 13 parsec Precision
FRB Collaboration, Thomas C. Abbott, Daniel Amouyal +83
Precise localizations of a small number of repeating fast radio bursts (FRBs) using very long baseline interferometry (VLBI) have enabled multiwavelength follow-up observations rev…
Searching for the sources of excess extragalactic dispersion of FRBs
Sunil Simha, Khee-Gan Lee, J. Xavier Prochaska +11
The FLIMFLAM survey is collecting spectroscopic data of field galaxies near fast radio burst (FRB) sightlines to constrain key parameters describing the distribution of matter in t…
A Catalog of Local Universe Fast Radio Bursts from CHIME/FRB and the KKO Outrigger
FRB Collaboration, Mandana Amiri, Daniel Amouyal +62
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…
Discovery and Localization of the Swift-Observed FRB 20241228A in a Star-forming Host Galaxy
Alice P. Curtin, Shion Andrew, Sunil Simha +27
On 2024 December 28, CHIME/FRB detected the thus-far non-repeating FRB 20241228A with a real-time signal-to-noise ratio of . Approximately 112~s later, the X-ray Telescope onb…
Disentangling the Cosmic Web Towards FRB 190608
Sunil Simha, Joseph N. Burchett, J. Xavier Prochaska +12
FRB 190608 was detected by ASKAP and localized to a spiral galaxy at in the SDSS footprint. The burst has a large dispersion measure ( )…
Dissecting the Local Environment of FRB 190608 in the Spiral Arm of its Host Galaxy
Jay S. Chittidi, Sunil Simha, Alexandra Mannings +15
We present a high-resolution analysis of the host galaxy of fast radio burst (FRB)~190608, an SB(r)c galaxy at (hereafter HG 190608), to dissect its local environment a…
Tilsotua: Reproducing Slitmask Sky Positions for use with the LRIS Multislit Archive
Jessica Sullivan, J. Christopher Howk, Nicolas Lehner +2
We present tilsotua, a code that calculates sky positions of the slits from Low-Resolution Imaging Spectrograph (LRIS) slitmasks used in multislit observations. Raw data for the Ke…
Modeling the Cosmic Dispersion Measure in the D < 120 Mpc Local Universe
Yuxin Huang, Khee-Gan Lee, Noam I. Libeskind +3
The Local Universe (D < 120 Mpc) has been intensely studied for decades, with highly complete galaxy redshift surveys now publicly available. These data have driven density reconst…
The Environments of Fast Radio Bursts Viewed Using Adaptive Optics
Michele N. Woodland, Alexandra G. Mannings, J. Xavier Prochaska +10
We present GeMS/GSAOI observations of five fast radio burst (FRB) host galaxies with sub-arcsecond localizations. We examine and quantify their spatial distributions and locations…
The FRB20190520B Sightline Intersects Foreground Galaxy Clusters
Khee-Gan Lee, Ilya S. Khrykin, Sunil Simha +7
The repeating fast radio burst FRB20190520B is an anomaly of the FRB population thanks to its high dispersion measure (DMpc/cc) despite its low redshift of $z_\mathrm{frb}…
Investigating the sightline of a highly scattered FRB through a filamentary structure in the local Universe
Kaitlyn Shin, Calvin Leung, Sunil Simha +31
Fast radio bursts (FRBs) are unique probes of extragalactic ionized baryonic structure as each signal, through its burst properties, holds information about the ionized matter it e…
Photometry and Spectroscopy of SN 2024pxl: A Luminosity Link Among Type Iax Supernovae
Mridweeka Singh, Lindsey A. Kwok, Saurabh W. Jha +90
We present extensive ultraviolet to optical photometric and optical to near-infrared (NIR) spectroscopic follow-up observations of the nearby intermediate-luminosity ($M_V = -16.81…
Localisation and host galaxy identification of new Fast Radio Bursts with MeerKAT
Inés Pastor-Marazuela, Alexa C. Gordon, Ben Stappers +18
Accurately localising fast radio bursts (FRBs) is essential for understanding their birth environments and for their use as cosmological probes. Recent advances in radio interferom…
James Webb Space Telescope Observations of the Nearby and Precisely-Localized FRB 20250316A: A Potential Near-IR Counterpart and Implications for the Progenitors of Fast Radio Bursts
Peter K. Blanchard, Edo Berger, Shion E. Andrew +23
We present deep James Webb Space Telescope near-infrared imaging to search for a quiescent or transient counterpart to FRB 20250316A, which was precisely localized with the CHIME/F…