Afterglow Models for GRB 020124
GRB 130427A Afterglow: A Test for GRB Models
... in afterglow decay slope if the observing band is between the synchrotron peak frequency ν m and cooling frequency ν c , as is assumed by both L13 and ...of GRB 130427A X-ray ...
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The Late-time Afterglow Evolution of Long Gamma-Ray Bursts GRB 160625B and GRB 160509A
... the afterglow of the long γ-ray bursts GRB 160625B (between 69 and 209 days) and GRB 160509A (between 35 and 80 ...the afterglow of GRB 160625B is inconsistent with a simple t −3/4 ...
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The Afterglow and Ulirg Host Galaxy of the Dark Short Grb 120804a
... Models with higher values of E K,iso and/or n lead to a lower value of ν m and a larger peak flux density, and therefore vio- late the radio limits (see for example dotted line in Figure 2). In addition, the lack ...
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The optical/NIR afterglow of GRB 111209A: Complex yet not unprecedented
... 41–46) are not displayed as the dominating supernova compo- nent (G15, K18A) induces a strong curvature into the spectrum, so power-law fits lose their validity. We furthermore perform three fits using both UVOT and ...
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Broadband Observations of the Afterglow of GRB : Observing the Effect of Inverse Compton Scattering
... Broadband afterglow observa- tions, spanning from X-ray to radio frequencies, provide a probe of the density structure of the circumburst medium, as well as of the ejecta energetics, geometry, and the physical ...
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The Afterglow and Early-type Host Galaxy of the Short GRB 150101B at Z = 0.1343
... γ & γ min , where γ min is the minimum Lorentz factor of the electron distribution. To determine the locations of the synchrotron break fre- quencies with respect to the X-ray, optical, and radio bands, and thus ...
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The luminous host galaxy, faint supernova and rapid afterglow rebrightening of GRB 100418A
... extinction models, and determined that there were no large differences with the different extinction laws due to the small amount of extinction and the low ...
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The Unusual Radio Afterglow of the Ultra-Long Gamma-Ray Burst GRB 130925A
... progenitor models, the spectral cut off in the radio, has to be explained, especially since it was not observed before in TDEs or normal long GRBs ...the afterglow emission may arise from a more distant ...
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GRB 120729A: External Shock Origin for Both the Prompt Gamma-Ray Emission and Afterglow
... standard afterglow model with time-dependent microphysics models have been proposed to solve dif ficulties encountered with observa- tions, such as X-ray afterglow plateaus, chromatic breaks, and ...
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Spectroscopy and multiband photometry of the afterglow of intermediate duration γ-ray burst GRB and its host galaxy ABSTRACT
... progenitor models, could in combination be used for population ...long GRB progen- ...both GRB and afterglow, requiring the redshift distribu- tion and jet-break determinations; the age of the ...
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Discovery of the Optical Afterglow and Host Galaxy of Short GRB 181123B at z = 1.754: Implications for Delay Time Distributions
... =1.754, GRB 181123B is the most distant secure SGRB with an optical afterglow detection and one of only three at z ...(DTD) models. We find that lognormal models with mean delay times of ≈4–6 ...
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The 80 Ms follow up of the X ray afterglow of GRB 130427A challenges the standard forward shock model
... T GRB 130427A was the brightest gamma-ray burst detected in the last 30 ...X-ray afterglow has been detected by sensitive X-ray observatories such as XMM–Newton and Chandra for a record-breaking baseline ...
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The gamma-ray burst afterglow modeling project : foundational statistics and absorption & extinction models
... in GRB fits, these data groups correspond to different time ranges, or “time slices”, in the ...discontinuous GRB light curve, with parameter linking across time slice data groups we can determine the ...
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Challenging gamma-ray burst models through the broadband dataset of GRB 060908
... Conclusions GRB 060908 was detected by all Swift instruments, securing a large set of observational data for the prompt and the early af- terglow ...the afterglow evolution for about two weeks and, finally, ...
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A Reverse Shock in GRB 130427A
... temporal evolution and spectral indices that allow us to determine the location of the synchrotron frequencies as well as the density profile of the circumburst medium (ISM profile: ρ = const; Wind: ρ ∝ r −2 ). The ...
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Early GRB Afterglows Revisited
... EARLY GRB AFTERGLOWS REVISITED ...standard afterglow model neglects the presence of the GRB prompt radiation ahead of the blast ...the GRB ejecta moves freely in a cavity behind its own ...
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The Afterglow and Environment of the Short Grb 111117a
... R.M. thanks Rodolfo Barniol Duran and Cristiano Guidorzi for useful discussions. We thank Francesco di Mille for carry- ing out the Magellan FourStar observations, and Andy Mon- son for assistance with the data ...
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The optical afterglow and host galaxy of GRB ,,
... X-ray afterglow (Costa et ...in GRB research. The determination of a redshift of 0.835 for GRB 970508 (Metzger et ...of GRB progenitors ...of GRB research is the use of GRBs as ...
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MAGIC upper limits on the GRB 090102 afterglow
... the afterglow at the considered time and, as a consequence, the cooling break is re- duced by a factor (1+Y e ...in GRB 090102 suggests that the standard model cannot adequately describe the dynamics of ...
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The Polarization Evolution of the Optical Afterglow of GRB 030329
... The temporal evolution of the degree and angle of polarization together with the R band photometry is shown in Figure 1, demonstrating the presence of non-zero polarization, Π 0 3 2 5% throughout a 38-day period, ...
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