293 citations · 515 across the 30 of their papers we have counts for
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Oblique Collision of a Relativistic Cold Shell with an Ideal Reflecting Wall
Jonathan Granot, Prasanta Bera, Michael Rabinovich +1
Relativistic flows are common in astrophysics and often form shocks when different parts of the flow collide at relativistic relative velocities. Such collisions are often oblique,…
Polarization of impulsive relativistic jets propagating in a stratified medium
Gal Birenbaum, Paz Beniamini, Jonathan Granot
Gamma-ray bursts (GRBs) and at least some tidal disruption events (TDEs) are highly energetic transients involving impulsive relativistic jets. As these jets propagate into their s…
Revealing the Structure and Magnetization of GRB Jets with ALMA Polarization Observations
Tanmoy Laskar, Collin T. Christy, Noah Franz +9
We present a systematic study of the currently available ALMA millimeter polarimetric sample of gamma-ray burst (GRB) afterglows. Our sample comprises 24 observations (20 new) of 1…
Old and Bright: The Remarkable Radio Brightening of the Engine-driven SN 2012au Several Years After Explosion Signals the Birth of a PWN
Eli Wiston, Raffaella Margutti, A. J. Nayana +23
We present the results from an extensive broad-band (radio to X-rays) observing campaign of the engine-driven Type Ib SN 2012au in the first 13 years of evolution. The early-time (…
A 14-year-old Mystery: The Peculiar Case of the Engine-driven SN 2012ap
Itai Sfaradi, Raffaella Margutti, Ryan Chornock +29
We present late-time ( d) optical (Keck), X-ray (Chandra and NuSTAR), and radio (VLA, ALMA, and the uGMRT) observations of the Type Ic-BL SN 2012ap. Previous studies of…
The Deep Newtonian Regime in Late-Time Blast Waves: Inevitable Transition and Distinct Flux Signatures
Sk. Minhajur Rahaman, Jonathan Granot, Paz Beniamini
In many astrophysical transients, outflows drive shocks into the ambient medium, accelerating electrons to non-thermal energy distributions that produce broadband synchrotron emiss…
First Detection of Faraday Rotation in a Gamma-Ray Burst Afterglow: Low Polarization and High Rotation Measure in GRB 260310A Reveal Jet Magnetic Structure and Environment
Collin T. Christy, Tanmoy Laskar, Kate D. Alexander +10
We report the detection of linear polarization in the radio afterglow of GRB 260310A, representing the first centimeter-wavelength polarization detection of a gamma-ray burst (GRB)…
Prospects of Prompt Gamma-Ray Burst Polarimetry with POLAR-2
Ramandeep Gill, Jiang He, Jonathan Granot +6
The dominant radiation mechanism that powers the prompt -ray emission in gamma-ray bursts (GRBs) remains poorly understood. High quality, time- and energy-resolved linear polari…
A milli-Tidal Disruption Event Model for GRB250702B: Main Sequence Star Disrupted by an IMBH
Jonathan Granot, Hagai B. Perets, Ramandeep Gill +2
GRB250702B is the longest GRB recorded so far, with multiple gamma-ray emission episodes spread over a duration exceeding ks and a weaker soft X-ray pre-peak day…
Synchrotron Self-Compton Model of TeV Afterglows in Gamma-Ray Bursts
Edilberto Aguilar-Ruiz, Ramandeep Gill, Paz Beniamini +1
The detection of a very-high-energy TeV spectral component in the afterglow emission of gamma-ray bursts (GRBs) has opened a new probe into the energetics of ultra-relativistic bla…
Comprehensive X-ray Observations of the Exceptional Ultra-long X-ray and Gamma-ray Transient GRB 250702B with Swift, NuSTAR, and Chandra: Insights from the X-ray Afterglow Properties
Brendan O'Connor, Ramandeep Gill, James DeLaunay +22
GRB 250702B is an exceptional transient that produced multiple episodes of luminous gamma-ray radiation lasting for ks, placing it among the class of ultra-long gamma-ray bur…
The redshift distribution of Einstein Probe transients supports their relation to gamma-ray bursts
Brendan O'Connor, Paz Beniamini, Eleonora Troja +9
The launch of the \textit{Einstein Probe} unleashed a new era of high-energy transient discovery in the largely unexplored soft X-ray band. The \textit{Einstein Probe} has detected…
GRB 250702B: Discovery of a Gamma-Ray Burst from a Black Hole Falling into a Star
Eliza Neights, Eric Burns, Chris L. Fryer +52
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 minu…
Ultra-long Gamma-ray Bursts from Micro-Tidal Disruption Events: The Case of GRB 250702B
Paz Beniamini, Hagai B. Perets, Jonathan Granot
Ultra-long gamma-ray bursts (ULGRBs), a rare class of high-energy transients with durations s, remain poorly understood. GRB 250702B is notable for its multi-hour prompt emi…
On the Efficiency of Producing Gamma-Ray Bursts from Isolated Population III Stars
Gibran Morales-Rivera, Ramandeep Gill, S. Jane Arthur +2
The rate of long-duration gamma-ray bursts (GRBs) from isolated Pop III stars is not well known, as it depends on our poor understanding of their initial mass function (IMF), rotat…
Afterglow Linear Polarization Signatures from Steep GRB Jets: Implications for Orphan Afterglows
Gal Birenbaum, Jonathan Granot, Paz Beniamini
Gamma-Ray Bursts (GRBs) are the strongest explosions in the Universe, and are powered by initially ultra-relativistic jets. The angular profile of GRB jets encodes important inform…
Persistent radio sources associated with fast radio bursts: Implications from magnetar progenitors
Sk. Minhajur Rahaman, Sandeep Kumar Acharya, Paz Beniamini +1
The rare association of three persistent radio sources (confirmed PRS1 and PRS2, candidate PRS3) with repeating fast radio bursts (FRB 20121102A, 20190520B, 20201124A) offers a uni…
Numerical simulations of internal shocks in spherical geometry: hydrodynamics and prompt emission
A. Charlet, J. Granot, P. Beniamini
Among the models used to explain the prompt emission of gamma-ray bursts (GRBs), internal shocks is a leading one. Its most basic ingredient is a collision between two cold shells…
Extragalactic Magnetar Giant Flares: Population Implications, Rates and Prospects for Gamma-Rays, Gravitational Waves and Neutrinos
Paz Beniamini, Zorawar Wadiasingh, Aaron Trigg +5
Magnetar Giant Flares (MGFs) are the most energetic non-catastrophic transients known to originate from stellar objects. The first discovered events were nearby. In recent years, s…
Afterglow Linear Polarization Signatures from Shallow GRB Jets: Implications for Energetic GRBs
Gal Birenbaum, Ramandeep Gill, Omer Bromberg +2
Gamma-ray bursts (GRBs) are powered by ultra-relativistic jets. The launching sites of these jets are surrounded by dense media, which the jets must cross before they can accelerat…
Galactic transient sources with the Cherenkov Telescope Array Observatory
Cherenkov Telescope Array Observatory Consortium
A wide variety of Galactic sources show transient emission at soft and hard X-ray energies: low- and high-mass X-ray binaries containing compact objects, isolated neutron stars exh…
Relativistic Shock Reflection using Integral Conservation Laws
Jonathan Granot, Michael Rabinovich
Shock wave reflection from a rigid wall has been thoroughly studied in the Newtonian limit, simplifying the problem by analyzing it in a steady-state frame, , where the point $…
A Numerical Study of Relativistic Oblique Shock Reflection
Prasanta Bera, Jonathan Granot, Michael Rabinovich +1
Shocks are ubiquitous in astrophysical sources, many of which involve relativistic bulk motions, leading to the formation of relativistic shocks. Such relativistic shocks have so f…
Internal Shocks Hydrodynamics: the Collision of Two Cold Shells in Detail
Sk. Minhajur Rahaman, Jonathan Granot, Paz Beniamini
Emission in many astrophysical transients originates from a shocked fluid. A central engine typically produces an outflow with varying speeds, leading to internal collisions within…