M. S. Briggs
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View article: Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-duration Gamma-ray Burst with an Associated Kilonova
Fermi-GBM Observations of GRB 230307A: An Exceptionally Bright Long-duration Gamma-ray Burst with an Associated Kilonova Open
On 2023 March 7 the Fermi Gamma-ray Burst Monitor observed the second-highest-fluence gamma-ray burst (GRB) ever, GRB 230307A. With a duration beyond 100 s, GRB 230307A contained a multitude of rapidly varying peaks, and was so bright it c…
View article: GRB 250702B: Discovery of a Gamma-Ray Burst from a Black Hole Falling into a Star
GRB 250702B: Discovery of a Gamma-Ray Burst from a Black Hole Falling into a Star Open
Gamma-ray bursts are the most luminous electromagnetic events in the universe. Their prompt gamma-ray emission has typical durations between a fraction of a second and several minutes. A rare subset of these events have durations in excess…
View article: Extragalactic magnetar giant flare GRB 231115A: Insights from <i>Fermi</i>/GBM observations
Extragalactic magnetar giant flare GRB 231115A: Insights from <i>Fermi</i>/GBM observations Open
Magnetar giant flares (MGFs) are the extremely short, energetic transients originating from highly magnetized neutron stars. When observed in nearby galaxies, these rare events are nearly indistinguishable from cosmological short gamma-ray…
View article: Extragalactic Magnetar Giant Flare GRB 231115A: Insights from Fermi/GBM Observations
Extragalactic Magnetar Giant Flare GRB 231115A: Insights from Fermi/GBM Observations Open
We present the detection and analysis of GRB 231115A, a candidate extragalactic magnetar giant flare (MGF) observed by Fermi/GBM and localized by INTEGRAL to the starburst galaxy M82. This burst exhibits distinctive temporal and spectral c…
View article: GRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxy
GRB 180128A: A second magnetar giant flare candidate from the Sculptor Galaxy Open
Magnetars are slowly rotating neutron stars that possess the strongest magnetic fields known in the cosmos (10 14 − 10 15 G). They display a range of transient high-energy electromagnetic activity. The brightest and most energetic of these…
View article: A Joint Fermi-GBM and Swift-BAT Analysis of Gravitational-wave Candidates from the Third Gravitational-wave Observing Run
A Joint Fermi-GBM and Swift-BAT Analysis of Gravitational-wave Candidates from the Third Gravitational-wave Observing Run Open
We present Fermi Gamma-ray Burst Monitor (Fermi-GBM) and Swift Burst Alert Telescope (Swift-BAT) searches for gamma-ray/X-ray counterparts to gravitational-wave (GW) candidate events identified during the third observing run of the Advance…
View article: GRB 180128A: A Second Magnetar Giant Flare Candidate from the Sculptor Galaxy
GRB 180128A: A Second Magnetar Giant Flare Candidate from the Sculptor Galaxy Open
Magnetars are slowly rotating neutron stars that possess the strongest magnetic fields ($10^{14}-10^{15} \mathrm{G}$) known in the cosmos. They display a range of transient high-energy electromagnetic activity. The brightest and most energ…
View article: Extreme Variability in a Long-duration Gamma-Ray Burst Associated with a Kilonova
Extreme Variability in a Long-duration Gamma-Ray Burst Associated with a Kilonova Open
The recent discovery of a kilonova from the long-duration gamma-ray burst (GRB) GRB 211211A challenges classification schemes based on temporal information alone. Gamma-ray properties of GRB 211211A reveal an extreme event, which stands ou…
View article: Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow
Fermi-GBM Discovery of GRB 221009A: An Extraordinarily Bright GRB from Onset to Afterglow Open
We report the discovery of GRB 221009A, the highest flux gamma-ray burst (GRB) ever observed by the Fermi Gamma-ray Burst Monitor (Fermi-GBM). This GRB has continuous prompt emission lasting more than 600 s, which smoothly transitions to a…
View article: Moon Burst Energetics All-sky Monitor: A Beyond Earth-orbit Gamma-ray Burst Observatory
Moon Burst Energetics All-sky Monitor: A Beyond Earth-orbit Gamma-ray Burst Observatory Open
Moon Burst Energetics All-sky Monitor (MoonBEAM) is a gamma-ray mission concept to observe the entire sky instantaneously for relativistic astrophysical explosions from a cislunar orbit. It is designed to explore the behavior of matter and…
View article: Extreme Variability in a Long Duration Gamma-ray Burst Associated with a Kilonova
Extreme Variability in a Long Duration Gamma-ray Burst Associated with a Kilonova Open
The recent discovery of a kilonova from the long duration gamma-ray burst, GRB 211211A, challenges classification schemes based on temporal information alone. Gamma-ray properties of GRB 211211A reveal an extreme event, which stands out am…
View article: Unsupervised Clustering and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground‐Based TGF Detection
Unsupervised Clustering and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground‐Based TGF Detection Open
We developed a framework merging unsupervised and supervised machine learning to classify lightning radio signals, and applied it to the possible detection of terrestrial gamma‐ray flashes (TGFs). Recent studies have established a tight co…
View article: GRB 221009A: The BOAT
GRB 221009A: The BOAT Open
GRB 221009A has been referred to as the brightest of all time (BOAT). We investigate the veracity of this statement by comparing it with a half century of prompt gamma-ray burst observations. This burst is the brightest ever detected by th…
View article: GRB 221009A, The BOAT
GRB 221009A, The BOAT Open
GRB 221009A has been referred to as the Brightest Of All Time (the BOAT). We investigate the veracity of this statement by comparing it with a half century of prompt gamma-ray burst observations. This burst is the brightest ever detected b…
View article: Combining Unsupervised and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground-based TGF Detection
Combining Unsupervised and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground-based TGF Detection Open
We developed a machine learning framework to classify lightning radio signals and detect terrestrial gamma-ray flashes (TGFs).Energetic in-cloud pulses (EIPs, >150 kA) have been connected to a subset of TGFs, making it possible to detect T…
View article: Unsupervised Clustering and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground-based TGF Detection
Unsupervised Clustering and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground-based TGF Detection Open
We developed a framework merging unsupervised and supervised machine learning to classify lightning radio signals, and applied it to the possible detection of terrestrial gamma-ray flashes (TGFs). Recent studies have established a tight co…
View article: WWLLN Datasets for "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption"
WWLLN Datasets for "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption" Open
These data files contain data used in the paper "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha’apai Volcanic Eruption", M. S. Briggs, S. Lesage, C. Schultz, B. Mailyan, R. H. Holzworth, Geophysical Research Letters, 2022…
View article: WWLLN Datasets for "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption"
WWLLN Datasets for "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha'apai Volcanic Eruption" Open
These data files contain data used in the paper "A Terrestrial Gamma-ray Flash from the 2022 Hunga Tonga–Hunga Ha’apai Volcanic Eruption", M. S. Briggs, S. Lesage, C. Schultz, B. Mailyan, R. H. Holzworth, Geophysical Research Letters, 2022…
View article: Searches for Modulated γ-Ray Precursors to Compact Binary Mergers in Fermi-GBM Data
Searches for Modulated γ-Ray Precursors to Compact Binary Mergers in Fermi-GBM Data Open
GW170817 is the only gravitational-wave event for which a confirmed γ -ray counterpart, GRB 170817A, has been detected. Here, we present a method to search for another type of γ -ray signal, a γ -ray burst precursor, associated with a comp…
View article: Searches for Modulated {\\gamma}-Ray Precursors to Compact Binary Mergers\n in Fermi-GBM Data
Searches for Modulated {\\gamma}-Ray Precursors to Compact Binary Mergers\n in Fermi-GBM Data Open
GW170817 is the only gravitational-wave (GW) event, for which a confirmed\n{\\gamma}-ray counterpart, GRB 170817A, has been detected. Here we present a\nmethod to search for another type of {\\gamma}-ray signal, a {\\gamma}-ray burst\nprec…
View article: Magnetar giant flare in NGC 253 seen by Fermi-GBM
Magnetar giant flare in NGC 253 seen by Fermi-GBM Open
FIGURES 25–30. Achrysocharoides robiniae sp. nov. 25. Head frontal, female. 26. Head frontal, male. 27. Vertex, female. 28. Vertex, male. 29. Thoracic dorsum, female. 30. Thoracic dorsum, male.
View article: Materials Precursor Score: Modelling Chemists' Intuition for the Synthetic Accessibility of Porous Organic Cage Precursors
Materials Precursor Score: Modelling Chemists' Intuition for the Synthetic Accessibility of Porous Organic Cage Precursors Open
Computation is increasingly being used to try to accelerate the discovery of new materials. One specific example of this is porous molecular materials, specifically porous organic cages, where the porosity of the materials predominantly co…
View article: BurstCube: status and public alerts
BurstCube: status and public alerts Open
BurstCube is a CubeSat Gamma-Ray Burst (GRB) detector expected to launch in 2022, significantly expanding sky coverage in the 50 keV to 1 MeV energy range and increasing the probability of detecting a gravitational wave counterpart. BurstC…
View article: Hard Burst Emission from the Soft Gamma Repeater SGR 1900+14
Hard Burst Emission from the Soft Gamma Repeater SGR 1900+14 Open
We present evidence for burst emission from SGR 1900+14 with a power-law high energy spectrum extending beyond 500 keV. Unlike previous detections of high energy photons during bursts from SGRs, these emissions are not associated with high…
View article: Statistical Properties of SGR 1900+14 Bursts
Statistical Properties of SGR 1900+14 Bursts Open
We study the statistics of soft gamma repeater (SGR) bursts using a database of 187 events detected with BATSE and 837 events detected with the Rossi X-Ray Timing Explorer Proportional Counter Array; all events are from SGR 1900+14 during …
View article: Statistical Properties of SGR 1806−20 Bursts
Statistical Properties of SGR 1806−20 Bursts Open
We present statistics of SGR 1806-20 bursts, combining 290 events detected with the Rossi X-Ray Timing Explorer/Proportional Counter Array, 111 events detected with the Burst and Transient Source Experiment, and 134 events detected with th…
View article: The Fermi-GBM Gamma-Ray Burst Spectral Catalog: 10 yr of Data
The Fermi-GBM Gamma-Ray Burst Spectral Catalog: 10 yr of Data Open
We present the systematic spectral analyses of gamma-ray bursts (GRBs) detected by the Fermi Gamma-Ray Burst Monitor during its first ten years of operation. This catalog contains two types of spectra: time-integrated spectral fits and spe…
View article: Terrestrial Gamma-ray Flashes Can Be Detected with Radio Measurements of Energetic In-cloud Pulses during Thunderstorms
Terrestrial Gamma-ray Flashes Can Be Detected with Radio Measurements of Energetic In-cloud Pulses during Thunderstorms Open
Earth and Space Science Open Archive This work has been accepted for publication in Geophysical Research Letters. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: On the Terrestrial Gamma‐Ray Flashes Preceding Narrow Bipolar Events
On the Terrestrial Gamma‐Ray Flashes Preceding Narrow Bipolar Events Open
Narrow bipolar events (NBEs) are occasionally reported to occur within a few ms after Terrestrial Gamma‐ray Flashes (TGFs), while the formation mechanism remains mysterious partially due to the lack of sufficient observations. Here, nine m…