An External Shock Origin of GRB $\textit{141028A}$

@article{Burgess2015AnES,
  title={An External Shock Origin of GRB \$\textit\{141028A\}\$},
  author={J Michael Burgess and Damien B'egu'e and Felix Ryde and Nicola Omodei and Asaf Pe’er and Judith Racusin and A. Cucchiara},
  journal={arXiv: High Energy Astrophysical Phenomena},
  year={2015}
}
The prompt emission of the long, smooth, and single-pulsed gamma-ray burst, GRB $\textit{141028A}$, is analyzed under the guise of an external shock model. First, we fit the $\gamma$-ray spectrum with a two-component photon model, namely synchrotron+blackbody, and then fit the recovered evolution of the synchrotron $\nu F_{\nu}$ peak to an analytic model derived considering the emission of a relativistic blast-wave expanding into an external medium. The prediction of the model for the $\nu F_… Expand
Bulk Lorentz factors of Gamma-Ray Bursts
Knowledge of the bulk Lorentz factor $\Gamma_{0}$ of GRBs allows us to compute their comoving frame properties shedding light on their physics. Upon collisions with the circumburst matter, theExpand
GRB 120729A: External Shock Origin for Both the Prompt Gamma-Ray Emission and Afterglow
Gamma-ray burst (GRB) 120729A was detected by Swift/BAT and Fermi/GBM, and then rapidly observed by Swift/XRT, Swift/UVOT, and ground-based telescopes. It had a single long and smooth \gamma-rayExpand
Lorentz Factor Evolution of an Expanding Jet Shell Observed in a Gamma-Ray Burst: Case Study of GRB 160625B
The Lorentz factor of a relativistic jet and its evolution during the jet expansion are difficult to estimate, especially for the jets in gamma-ray bursts (GRBs). However, it is related to theExpand
Investigating Subphotospheric Dissipation in Gamma-Ray Bursts Using Joint Fermi–Swift Observations
The jet photosphere has been proposed as the origin for the gamma-ray burst (GRB) prompt emission. In many such models, characteristic features in the spectra appear below the energy range of theExpand
Gravitational wave observations may constrain gamma-ray burst models: the case of GW 150914 - GBM
The possible short gamma-ray burst (GRB) observed by {\it Fermi}/GBM in coincidence with the first gravitational wave (GW) detection, offers new ways to test GRB prompt emission models. GravitationalExpand
The Fraction of Gamma-Ray Bursts with an Observed Photospheric Emission Episode
There is no complete description of the emission physics during the prompt phase in gamma-ray bursts. Spectral analyses, however, indicate that many spectra are narrower than what is expected forExpand
What can we learn from "internal plateaus"? The peculiar afterglow of GRB 070110
Context: The origin of GRBs' prompt emission is highly debated. Proposed scenarios involve dissipation processes above or below the photosphere of an ultra-relativistic outflow. Aims: We search forExpand
On the Origin of the Multi-GeV Photons from the Closest Burst with Intermediate Luminosity: GRB 190829A
Very high energy (VHE) emission is usually interpreted in the synchrotron self-Compton scenario and expected from the low-redshift and high-luminosity gamma-ray bursts (GRBs), such as GRB 180720B andExpand
Testing a model for subphotospheric dissipation in GRBs: fits to Fermi data constrain the dissipation scenario
It has been suggested that the prompt emission in gamma-ray bursts (GRBs) could be described by radiation from the photosphere in a hot fireball. Such models must be tested by directly fitting themExpand
The anatomy of a long gamma-ray burst: a simple classification scheme for the emission mechanism(s)
Ultra-relativistic motion and efficient conversion of kinetic energy to radiation are required by gamma-ray burst (GRB) observations, yet they are difficult to simultaneously achieve. Three leadingExpand
...
1
2
...

References

SHOWING 1-10 OF 62 REFERENCES
On the magnetization of gamma-ray burst blast waves
The origin of magnetic fields that permeate the blast waves of gamma-ray bursts (GRBs) is a long-standing problem. The present paper argues that in four GRBs revealing extended emission at > 100 MeV,Expand
Analytic Light Curves of Gamma-Ray Burst Afterglows: Homogeneous versus Wind External Media
Assuming an adiabatic evolution of a gamma-ray burst (GRB) remnant interacting with an external medium, we calculate the injection, cooling, and absorption break frequencies and the afterglow fluxExpand
The Internal-collision-induced Magnetic Reconnection and Turbulence (ICMART) Model of Gamma-ray Bursts
The recent Fermi observation of GRB 080916C shows that the bright photosphere emission associated with a putative fireball is missing, which suggests that the central engine likely launches aExpand
CONSTRAINTS ON THE SYNCHROTRON SHOCK MODEL FOR THE FERMI GRB 090820A OBSERVED BY GAMMA-RAY BURST MONITOR
Discerning the radiative dissipation mechanism for prompt emission in Gamma-Ray Bursts (GRBs) requires detailed spectroscopic modeling that straddles the F peak in the 100 keV - 1 MeV range.Expand
GAMMA-RAY BURSTS FROM INTERNAL SHOCKS IN A RELATIVISTIC WIND : TEMPORAL AND SPECTRAL PROPERTIES
We construct models for gamma-ray bursts where the emission comes from internal shocks in a relativistic wind with a highly non uniform distribution of the Lorentz factor. We follow the evolution ofExpand
CONSTRAINTS ON THE SYNCHROTRON EMISSION MECHANISM IN GAMMA-RAY BURSTS
We reexamine the general synchrotron model for gamma-ray bursts' (GRBs') prompt emission and determine the regime in the parameter phase space in which it is viable. We characterize a typical GRBExpand
TIME-RESOLVED ANALYSIS OF FERMI GAMMA-RAY BURSTS WITH FAST- AND SLOW-COOLED SYNCHROTRON PHOTON MODELS
Time-resolved spectroscopy is performed on eight bright, long gamma-ray bursts (GRBs) dominated by single emission pulses that were observed with the Fermi Gamma-Ray Space Telescope. Fitting theExpand
Can Internal Shocks Produce the Variability in Gamma-Ray Bursts?
We discuss the possibility that gamma-ray bursts result from internal shocks in ultrarelativistic matter. Using a simple model, we calculate the temporal structure and estimate the efficiency of thisExpand
Afterglow emission from pair-loaded blast waves in gamma-ray bursts
The MeV radiation front of gamma-ray bursts creates copious e± pairs as it propagates through an ambient medium. The created pairs enrich the leptonic component of the medium by a large factor atExpand
Cooling Timescales and Temporal Structure of Gamma-Ray Bursts
A leading mechanism for producing cosmological gamma-ray bursts (GRBs) is via ultrarelativistic particles in an expanding fireball. The kinetic energy of the particles is converted into thermalExpand
...
1
2
3
4
5
...