Gavin P. Lamb
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View article: Unveiling the nature of the Einstein Probe transient EP 241021a
Unveiling the nature of the Einstein Probe transient EP 241021a Open
We present a multi-wavelength analysis of the fast X-ray transient EP 241021a, discovered by the Wide-field X-ray Telescope aboard the Einstein Probe satellite on 2024 October 21. The event was not detected in gamma-rays. Follow-up observa…
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: EP250207b is not a collapsar fast X-ray transient. Is it due to a binary compact object merger?
EP250207b is not a collapsar fast X-ray transient. Is it due to a binary compact object merger? Open
Fast X-ray transients (FXTs) are short-lived extragalactic X-ray sources. Recent progress through multiwavelength follow-up of Einstein Probe-discovered FXTs has shown that several are related to collapsars, which can also produce $\gamma$…
View article: The Radio Flare and Multiwavelength Afterglow of the Short GRB 231117A: Energy Injection from a Violent Shell Collision
The Radio Flare and Multiwavelength Afterglow of the Short GRB 231117A: Energy Injection from a Violent Shell Collision Open
We present the early radio detection and multiwavelength modeling of the short gamma-ray burst (GRB) 231117A at redshift z = 0.257. The Australia Telescope Compact Array automatically triggered a 9 hr observation of GRB 231117A at 5.5 and …
View article: JWST Spectroscopy of GRB 250702B: An Extremely Rare and Exceptionally Energetic Burst in a Dusty, Massive Galaxy at $z=1.036$
JWST Spectroscopy of GRB 250702B: An Extremely Rare and Exceptionally Energetic Burst in a Dusty, Massive Galaxy at $z=1.036$ Open
We present follow-up observations of the day-long, repeating GRB 250702B with the Near Infrared Spectrograph (NIRSpec) on board the James Webb Space Telescope (JWST). Through the identification of narrow hydrogen emission lines at a consis…
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: GRB 241105A: a test case for GRB classification and rapid <i>r</i> -process nucleosynthesis channels
GRB 241105A: a test case for GRB classification and rapid <i>r</i> -process nucleosynthesis channels Open
Gamma-ray bursts (GRBs) offer a powerful window to probe the progenitor systems responsible for the formation of heavy elements through the rapid neutron capture (r-) process, thanks to their exceptional luminosity, which allows them to be…
View article: The Day-long, Repeating GRB 250702B: A Unique Extragalactic Transient
The Day-long, Repeating GRB 250702B: A Unique Extragalactic Transient Open
γ -ray bursts (GRBs) are singular outbursts of high-energy radiation with durations typically lasting from milliseconds to minutes and, in extreme cases, a few hours. They are attributed to the catastrophic outcomes of stellar-scale events…
View article: The radio flare and multi-wavelength afterglow of the short GRB 231117A: energy injection from a violent shell collision
The radio flare and multi-wavelength afterglow of the short GRB 231117A: energy injection from a violent shell collision Open
We present the early radio detection and multi-wavelength modeling of the short gamma-ray burst (GRB) 231117A at redshift $z=0.257$. The Australia Telescope Compact Array automatically triggered a 9-hour observation of GRB 231117A at 5.5 a…
View article: GRB 241105A: A test case for GRB classification and rapid r-process nucleosynthesis channels
GRB 241105A: A test case for GRB classification and rapid r-process nucleosynthesis channels Open
Gamma-ray bursts (GRBs) offer a powerful window to probe the progenitor systems responsible for the formation of heavy elements through the rapid neutron capture (r-) process, thanks to their exceptional luminosity, which allows them to be…
View article: The day-long, repeating GRB 250702BDE / EP250702a: A unique extragalactic transient
The day-long, repeating GRB 250702BDE / EP250702a: A unique extragalactic transient Open
Gamma-ray bursts (GRBs) are singular outbursts of high-energy radiation with durations typically lasting from milliseconds to minutes and, in extreme cases, a few hours. They are attributed to the catastrophic outcomes of stellar-scale eve…
View article: EP240801a/XRF 240801B: An X-Ray Flash Detected by the Einstein Probe and the Implications of Its Multiband Afterglow
EP240801a/XRF 240801B: An X-Ray Flash Detected by the Einstein Probe and the Implications of Its Multiband Afterglow Open
We present multiband observations and analysis of EP240801a, a low-energy, extremely soft gamma-ray burst (GRB) discovered on 2024 August 1 by the Einstein Probe (EP) satellite with a weak contemporaneous signal also detected by the Fermi …
View article: Joint Radiative and Kinematic Modelling of X-ray Binary Ejecta: Energy Estimate and Reverse Shock Detection
Joint Radiative and Kinematic Modelling of X-ray Binary Ejecta: Energy Estimate and Reverse Shock Detection Open
Black hole X-ray binaries in outburst launch discrete, large-scale jet ejections which can propagate to parsec scales. The kinematics of these ejecta appear to be well described by relativistic blast wave models original devised for gamma-…
View article: Prompt periodicity in the GRB 211211A precursor: black-hole or magnetar engine?
Prompt periodicity in the GRB 211211A precursor: black-hole or magnetar engine? Open
The merger origin long GRB 211211A was a class (re-)defining event. A precursor was identified with a $\sim 1$ s separation from the main burst, as well as a claimed candidate quasi-periodic oscillation (QPO) with a frequency $\sim 20$ Hz.…
View article: Interaction shift of the Bose-Einstein condensation temperature in a dipolar gas
Interaction shift of the Bose-Einstein condensation temperature in a dipolar gas Open
We report measurements of the Bose-Einstein condensate critical temperature shift due to dipolar interactions, employing samples of ultracold erbium atoms which feature significant (magnetic) dipole-dipole interactions in addition to tunab…
View article: The Nature of Optical Afterglows without Gamma-Ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling
The Nature of Optical Afterglows without Gamma-Ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling Open
In the past few years, the improved sensitivity and cadence of wide-field optical surveys have enabled the discovery of several afterglows without associated detected gamma-ray bursts (GRBs). We present the identification, observations, an…
View article: Multi-messenger gravitational lensing
Multi-messenger gravitational lensing Open
We introduce the rapidly emerging field of multi-messenger gravitational lensing—the discovery and science of gravitationally lensed phenomena in the distant universe through the combination of multiple messengers. This is framed by gravit…
View article: Multipeaked non-thermal light curves from magnetar-powered gamma-ray bursts
Multipeaked non-thermal light curves from magnetar-powered gamma-ray bursts Open
Binary neutron star mergers and collapsing massive stars can both create millisecond magnetars. Such magnetars are candidate engines to power gamma-ray bursts (GRBs). The non-thermal light curve of the resulting transients can exhibit mult…
View article: Multi-messenger Gravitational Lensing
Multi-messenger Gravitational Lensing Open
We introduce the rapidly emerging field of multi-messenger gravitational lensing - the discovery and science of gravitationally lensed phenomena in the distant universe through the combination of multiple messengers. This is framed by grav…
View article: Gravitational Lensing in gamma-ray bursts
Gravitational Lensing in gamma-ray bursts Open
Gravitationally lensed Gamma-ray bursts (GRBs) offer critical advantages over other lensed sources. They can be detected via continuously operating detectors covering most of the sky. They offer extremely high time resolution to determine …
View article: Prompt Periodicity in the GRB 211211A Precursor: Black-hole or magnetar engine?
Prompt Periodicity in the GRB 211211A Precursor: Black-hole or magnetar engine? Open
The merger origin long GRB 211211A was a class (re-)defining event. A precursor was identified with a $\sim 1$ s separation from the main burst, as well as a claimed candidate quasi-periodic oscillation (QPO) with a frequency $\sim20$ Hz. …
View article: The brightest GRB ever detected: GRB 221009A as a highly luminous event at <i>z</i> = 0.151
The brightest GRB ever detected: GRB 221009A as a highly luminous event at <i>z</i> = 0.151 Open
Context. The extreme luminosity of gamma-ray bursts (GRBs) makes them powerful beacons, thus effective probes of the distant Universe. The most luminous bursts are typically detected at moderate and high redshift, where the volume for seei…
View article: Multidisciplinary Science in the Multimessenger Era
Multidisciplinary Science in the Multimessenger Era Open
Astrophysical observations of the cosmos allow us to probe extreme physics and answer foundational questions on our universe. Modern astronomy is increasingly operating under a holistic approach, probing the same question with multiple dia…
View article: Shift of the Bose-Einstein condensation temperature due to dipolar interactions
Shift of the Bose-Einstein condensation temperature due to dipolar interactions Open
We report the first measurements of the BEC critical temperature shift due to dipolar interactions, employing samples of ultracold erbium atoms which feature significant (magnetic) dipole-dipole interactions in addition to tuneable contact…
View article: The luminous, slow-rising orphan afterglow AT2019pim as a candidate moderately relativistic outflow
The luminous, slow-rising orphan afterglow AT2019pim as a candidate moderately relativistic outflow Open
Classical gamma-ray bursts (GRBs) have two distinct emission episodes: prompt emission from ultrarelativistic ejecta and afterglow from shocked circumstellar material. While both components are extremely luminous in known GRBs, a variety o…
View article: Multi-Peaked Non-Thermal Light Curves from Magnetar-Powered Gamma-Ray Bursts
Multi-Peaked Non-Thermal Light Curves from Magnetar-Powered Gamma-Ray Bursts Open
Binary neutron star mergers and collapsing massive stars can both create millisecond magnetars. Such magnetars are candidate engines to power gamma-ray bursts (GRBs). The non-thermal light curve of the resulting transients can exhibit mult…
View article: The Nature of Optical Afterglows Without Gamma-ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling
The Nature of Optical Afterglows Without Gamma-ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling Open
In the past few years, the improved sensitivity and cadence of wide-field optical surveys have enabled the discovery of several afterglows without associated detected gamma-ray bursts (GRBs). We present the identification, observations, an…
View article: Rubin ToO 2024: Envisioning the Vera C. Rubin Observatory LSST Target of Opportunity program
Rubin ToO 2024: Envisioning the Vera C. Rubin Observatory LSST Target of Opportunity program Open
The Legacy Survey of Space and Time (LSST) at Vera C. Rubin Observatory is planned to begin in the Fall of 2025. The LSST survey cadence has been designed via a community-driven process regulated by the Survey Cadence Optimization Committe…
View article: GRB 211211A: The Case for an Engine-powered over r-process-powered Blue Kilonova
GRB 211211A: The Case for an Engine-powered over r-process-powered Blue Kilonova Open
The recent gamma-ray burst (GRB) GRB 211211A provides the earliest (∼5 hr) data of a kilonova (KN) event, displaying bright (∼10 42 erg s −1 ) and blue early emission. Previously, this KN was explained using simplistic multicomponent fitti…
View article: Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multiband monitoring with RINGO3 and <i>Fermi</i>
Distinguishing radiation mechanisms and particle populations in blazar jets through long-term multiband monitoring with RINGO3 and <i>Fermi</i> Open
We present the results of seven years of multicolour photometric monitoring of a sample of 31 $\gamma$-ray bright blazars using the RINGO3 polarimeter on the Liverpool Telescope from 2013–2020. We explore the relationships between simultan…