87 citations · 644 across the 28 of their papers we have counts for
23 papers · 1 filter
An internal shock model calibrated with real gamma-ray burst light curves using a genetic algorithm
Manuele Maistrello, Cristiano Guidorzi, Shiho Kobayashi +1
The origin of gamma-ray burst (GRB) prompt emission remains an open question. The internal shock (IS) model is a leading scenario for converting relativistic ejecta kinetic energy…
Multi-wavelength Constraints on the Transient EP250905a
J. Quirola-Vasquez, P. G. Jonker, A. Levan +30
Fast X-ray transients (FXTs) are a diverse class of high-energy suggested origins, ranging from stellar explosions to compact object mergers. The Einstein Probe (EP) satellite disc…
Failed jet breakout in the metal-poor broad-lined type Ic supernova 2026gzf
Antonio Martin-Carrillo, Christina C. Thöne, James K. Leung +103
A long-standing question in the death of massive stars is the role of relativistic jets. While many gamma-ray bursts and some fast X-ray transients seem to be associated with broad…
The most distant optically polarised GRB afterglow: GRB 240419A at z = 5.178
R. Brivio, S. Covino, M. Ferro +31
Gamma-ray bursts (GRBs) are extremely bright phenomena powered by relativistic jets arising from explosive events at cosmological distances. The nature of the jet and the configura…
A set of distinctive properties ruling the prompt emission of GRB 230307A and other long γ-ray bursts from compact object mergers
R. Maccary, C. Guidorzi, M. Maistrello +9
Short gamma-ray bursts (SGRBs), occasionally followed by a long and spectrally soft extended emission, are associated with compact object mergers (COMs). Yet, a few recent long GRB…
New results on the gamma-ray burst variability-luminosity relation
C. Guidorzi, R. Maccary, A. Tsvetkova +13
At the dawn of the gamma-ray burst (GRB) afterglow era, a Cepheid-like correlation was discovered between time variability V and isotropic-equivalent peak luminosity Liso of the pr…
A millimeter rebrightening in GRB 210702A
Simon de Wet, Tanmoy Laskar, Paul J. Groot +9
We present X-ray to radio frequency observations of the bright long gamma-ray burst GRB 210702A. Our ALMA 97.5 GHz observations show a significant rebrightening by a factor of ~2 b…
Varying linear polarisation in the dust-free GRB 210610B
J. F. Agüí Fernández, A. de Ugarte Postigo, C. C. Thöne +19
Long gamma ray bursts (GRBs) are produced by the collapse of some very massive stars, which emit ultra-relativistic jets. When the jets collide with the interstellar medium they de…
Fires in the deep: The luminosity distribution of early-time gamma-ray-burst afterglows in light of the Gamow Explorer sensitivity requirements
D. A. Kann, N. E. White, G. Ghirlanda +58
Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (z > 5), pinpointing the locations of the earliest star-forming galaxies and providing bright backlights t…
Detection of an intranight optical hard-lag with colour variability in blazar PKS 0735+178
Callum McCall, Helen E. Jermak, Iain A. Steele +3
Blazars are a highly variable subclass of active galactic nuclei that have been observed to vary significantly during a single night. This intranight variability remains a debated…
Coherence scale of magnetic fields generated in early-time forward shocks of GRBs
N. Jordana-Mitjans, C. G. Mundell, R. J. Smith +6
We report the earliest-ever detection of optical polarization from a GRB forward shock (GRB 141220A), measured s after the burst using the multi-colour RINGO3 optica…
Lowly polarized light from a highly magnetized jet of GRB 190114C
N. Jordana-Mitjans, C. G. Mundell, S. Kobayashi +12
We report multi-color optical imaging and polarimetry observations of the afterglow of the first TeV- detected gamma-ray burst, GRB 190114C, using RINGO3 and MASTER II polarimeters…
X-shooter and ALMA spectroscopy of GRB 161023A - A study of metals and molecules in the line of sight towards a luminous GRB
A. de Ugarte Postigo, C. C. Thöne, J. Bolmer +45
Long gamma-ray bursts are produced during the dramatic deaths of massive stars with very short lifetimes, meaning that they explode close to the birth place of their progenitors. D…
Polarimetry and Photometry of Gamma-Ray Bursts with RINGO2
I. A. Steele, D. Kopac, D. M. Arnold +8
We present a catalog of early-time (~10^2-10^4s) photometry and polarimetry of all Gamma-Ray Burst (GRB) optical afterglows observed with RINGO2 imaging polarimeter on the Liverpoo…
Limits on optical polarization during the prompt phase of GRB 140430A
D. Kopac, C. G. Mundell, J. Japelj +17
Gamma-ray burst GRB 140430A was detected by the Swift satellite and observed promptly with the imaging polarimeter RINGO3 mounted on the Liverpool Telescope, with observations begi…
Radio flares from gamma-ray bursts
D. Kopac, C. G. Mundell, S. Kobayashi +6
We present predictions of centimeter and millimeter radio emission from reverse shocks in the early afterglows of gamma-ray bursts with the goal of determining their detectability…
The nature of the late achromatic bump in GRB 120326A
A. Melandri, F. J. Virgili, C. Guidorzi +24
The long gamma-ray burst GRB 120326A at redshift exhibited a multi-band light curve with a striking feature: a late-time, long-lasting achromatic rebrighten…
The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?
Massimiliano De Pasquale, N. P. M. Kuin, S. Oates +36
We present a wide dataset of gamma-ray, X-ray, UVOIR, and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this…
GRB 090727 and gamma-ray bursts with early time optical emission
D. Kopac, S. Kobayashi, A. Gomboc +9
We present a multi-wavelength analysis of gamma-ray burst GRB 090727, for which optical emission was detected during the prompt gamma-ray emission by the 2-m autonomous robotic Liv…
Constraining GRB Emission Physics with Extensive Early-Time, Multiband Follow-up
A. Cucchiara, S. B. Cenko, J. S. Bloom +21
Understanding the origin and diversity of emission processes responsible for Gamma-ray Bursts (GRBs) remains a pressing challenge. While prompt and contemporaneous panchromatic obs…
A faint optical flash in dust-obscured GRB 080603A - implications for GRB prompt emission mechanisms
C. Guidorzi, S. Kobayashi, D. A. Perley +23
We report the detection of a faint optical flash by the 2-m Faulkes Telescope North simultaneously with the second of two prompt gamma-ray pulses in INTEGRAL gamma-ray burst (GRB)…
GRB 090313 and the Origin of Optical Peaks in GRB Light Curves: Implications for Lorentz Factors and Radio Flares
A. Melandri, S. Kobayashi, C. G. Mundell +18
We use a sample of 19 Gamma Ray Bursts (GRBs) that exhibit single-peaked optical light curves to test the standard fireball model by investigating the relationship between the time…
GRB 090902B: afterglow observations and implications
S. B. Pandey, C. A. Swenson, D. A. Perley +30
The optical-infrared afterglow of the LAT-detected long duration burst, GRB 090902B, has been observed by several instruments. The earliest detection by ROTSE-IIIa occurred 80 minu…