scholarly journals Spectral Evolutions Study of Gamma-Ray Burst Exponential Decays with Suzaku-WAM

2011 ◽  
Vol 7 (S279) ◽  
pp. 411-412
Author(s):  
Makoto S. Tashiro ◽  
Kaori Onda ◽  
Kazutaka Yamaoka ◽  
Masahiro Ohno ◽  
Satoshi Sugita ◽  
...  
Keyword(s):  
Exponential Decay ◽  
Gamma Ray ◽  
Thermal Emission ◽  
Wide Band ◽  
Light Curves ◽  
Emission Model ◽  
Spectral Evolution ◽  
Time Resolved ◽  
Gamma Ray Burst ◽  
Sky Monitor

AbstractAn observational study is presented of the spectral evolution of gamma-ray burst (GRB) prompt emissions with the Suzaku Wide-band All-sky Monitor (WAM). We selected 6 bright GRBs exhibiting 7 well-separated fast-rise-exponential-decay (FRED) shaped light curves to investigate spectral changes by evaluating exponential decay time constants of the energy-resolved light curves. In addition, we carried out time-resolved spectroscopy of two of them which were located with accuracy sufficient to evaluate the time-resolved spectra with precise energy response matrices. The two imply different emission mechanisms; the one is well reproduced with a cooling blackbody radiation model with a power-law component, while the other prefers non-thermal emission model with a decaying turn over energy.

scholarly journals Gamma‐Ray Burst Afterglow: Polarization and Analytic Light Curves

1999 ◽  
Vol 511 (2) ◽  
pp. 852-861 ◽  
Author(s):  
Andrei Gruzinov ◽  
Eli Waxman
Keyword(s):  
Gamma Ray ◽  
Light Curves ◽  
Gamma Ray Burst

Spectral Evolution of Swift Gamma-ray Burst Tails: an Update

2010 ◽  
Author(s):  
V. Mangano ◽  
B. Sbarufatti ◽  
Nobuyuki Kawai ◽  
Shigehiro Nagataki
Keyword(s):  
Gamma Ray ◽  
Spectral Evolution ◽  
Gamma Ray Burst

scholarly journals Are the missing X-ray breaks in gamma-ray burst afterglow light curves merely hidden?

2008 ◽  
Vol 386 (2) ◽  
pp. 859-863 ◽  
Author(s):  
P. A. Curran ◽  
A. J. van der Horst ◽  
R. A. M. J. Wijers
Keyword(s):  
Gamma Ray ◽  
Light Curves ◽  
Gamma Ray Burst ◽  
X Ray

scholarly journals SWIFT OBSERVATIONS OF GAMMA-RAY BURST PULSE SHAPES: GRB PULSE SPECTRAL EVOLUTION CLARIFIED

2015 ◽  
Vol 815 (2) ◽  
pp. 134 ◽  
Author(s):  
Jon Hakkila ◽  
Amy Lien ◽  
Takanori Sakamoto ◽  
David Morris ◽  
James E. Neff ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Spectral Evolution ◽  
Gamma Ray Burst ◽  
Burst Pulse

scholarly journals Imprint of Gravitational Lensing by Population III Stars in Gamma‐Ray Burst Light Curves

2006 ◽  
Vol 650 (1) ◽  
pp. 252-260 ◽  
Author(s):  
Y. Hirose ◽  
M. Umemura ◽  
A. Yonehara ◽  
J. Sato
Keyword(s):  
Gravitational Lensing ◽  
Gamma Ray ◽  
Light Curves ◽  
Gamma Ray Burst ◽  
Population Iii Stars ◽  
Population Iii

scholarly journals A comparison between short GRB afterglows and kilonova AT2017gfo: shedding light on kilonovae properties

2020 ◽  
Vol 493 (3) ◽  
pp. 3379-3397 ◽  
Author(s):  
A Rossi ◽  
G Stratta ◽  
E Maiorano ◽  
D Spighi ◽  
N Masetti ◽  
...  
Keyword(s):  
Gravitational Wave ◽  
Gamma Ray ◽  
Light Curves ◽  
Optical Counterpart ◽  
Wave Source ◽  
Gamma Ray Burst ◽  
Nir Light ◽  
First Time ◽  
Short Grbs

ABSTRACT Multimessenger astronomy received a great boost following the discovery of kilonova (KN) AT2017gfo, the optical counterpart of the gravitational wave source GW170817 associated with the short gamma-ray burst GRB 170817A. AT2017gfo was the first KN that could be extensively monitored in time using both photometry and spectroscopy. Previously, only few candidates have been observed against the glare of short GRB afterglows. In this work, we aim to search the fingerprints of AT2017gfo-like KN emissions in the optical/NIR light curves of 39 short GRBs with known redshift. For the first time, our results allow us to study separately the range of luminosity of the blue and red components of AT2017gfo-like kilonovae in short GRBs. In particular, the red component is similar in luminosity to AT2017gfo, while the blue KN can be more than 10 times brighter. Finally, we exclude a KN as luminous as AT2017gfo in GRBs 050509B and 061201.

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