BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission

Observations of the prompt emission of several Gamma Ray Bursts (GRBs) detected with the instruments on-board the Fermi Gamma ray Space Telescope (hereafter Fermi) as well with the Burst and Transient Source Experiment (BATSE) on-board the Compton Gamma Ray Observatory (CGRO) reveal deviations from...

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Autores principales: Sacahui, José Rodrigo, Guiriec, Sylvain, González, Maria Magdalena, Kouveliotou, Chryssa, Gehrels, Neil, McEnery, Julie
Formato: Objeto de conferencia
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Astronómicas
Gamma Ray Bursts
Burst and Transient Source Experiment
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/168112
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-168112
record_format dspace
spelling I19-R120-10915-1681122024-07-29T20:02:01Z http://sedici.unlp.edu.ar/handle/10915/168112 BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission Sacahui, José Rodrigo Guiriec, Sylvain González, Maria Magdalena Kouveliotou, Chryssa Gehrels, Neil McEnery, Julie 2015-10 2016 2024-07-29T15:41:02Z en Ciencias Astronómicas Gamma Ray Bursts Burst and Transient Source Experiment Observations of the prompt emission of several Gamma Ray Bursts (GRBs) detected with the instruments on-board the Fermi Gamma ray Space Telescope (hereafter Fermi) as well with the Burst and Transient Source Experiment (BATSE) on-board the Compton Gamma Ray Observatory (CGRO) reveal deviations from the Band function to describe their spectra in the keV-MeV energy range. Analysis of Fermi data conclude that GRB prompt emission is adequately fitted with the simultaneous combination of three emission components: a thermal-like component interpreted as the jet photosphere, a non-thermal component interpreted as synchrotron radiation from particles within the jet and an additional non-thermal power-law (PL) function extending from low to high energies in gamma-rays, interpreted as Inverse Compton emission. In this work we present new analysis of three BATSE Bursts, namely GRBs 941017, 970111 and 990123. We show that the BATSE data are fully consistent with the model derived from Fermi data and that these three BATSE bursts also exhibit the three different components as reported from Fermi, noticing that they present similar spectral behaviour. In addition, the analysis using this three-component model during the prompt emission results in a strong correlation between the time-resolved luminosity and the corresponding rest-frame F spectral peak energy (LnTh i -EnTh;rest p;i relation). When fitted with a power law the relation have similar indices for all three bursts and these values are also in perfect agreement with the Fermi results. This points toward a possible universal emission process intrinsic to the non-thermal component of GRB prompt emission. Using this correlation we estimated the redshift for GRBs 941017 and 970111 using GRB990123 (with known redshift) as reference. The estimated redshifts for these bursts are typical values for long GRBs. Facultad de Ciencias Astronómicas y Geofísicas Objeto de conferencia Objeto de conferencia http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 175-178
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Gamma Ray Bursts
Burst and Transient Source Experiment
spellingShingle Ciencias Astronómicas
Gamma Ray Bursts
Burst and Transient Source Experiment
Sacahui, José Rodrigo
Guiriec, Sylvain
González, Maria Magdalena
Kouveliotou, Chryssa
Gehrels, Neil
McEnery, Julie
BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
topic_facet Ciencias Astronómicas
Gamma Ray Bursts
Burst and Transient Source Experiment
description Observations of the prompt emission of several Gamma Ray Bursts (GRBs) detected with the instruments on-board the Fermi Gamma ray Space Telescope (hereafter Fermi) as well with the Burst and Transient Source Experiment (BATSE) on-board the Compton Gamma Ray Observatory (CGRO) reveal deviations from the Band function to describe their spectra in the keV-MeV energy range. Analysis of Fermi data conclude that GRB prompt emission is adequately fitted with the simultaneous combination of three emission components: a thermal-like component interpreted as the jet photosphere, a non-thermal component interpreted as synchrotron radiation from particles within the jet and an additional non-thermal power-law (PL) function extending from low to high energies in gamma-rays, interpreted as Inverse Compton emission. In this work we present new analysis of three BATSE Bursts, namely GRBs 941017, 970111 and 990123. We show that the BATSE data are fully consistent with the model derived from Fermi data and that these three BATSE bursts also exhibit the three different components as reported from Fermi, noticing that they present similar spectral behaviour. In addition, the analysis using this three-component model during the prompt emission results in a strong correlation between the time-resolved luminosity and the corresponding rest-frame F spectral peak energy (LnTh i -EnTh;rest p;i relation). When fitted with a power law the relation have similar indices for all three bursts and these values are also in perfect agreement with the Fermi results. This points toward a possible universal emission process intrinsic to the non-thermal component of GRB prompt emission. Using this correlation we estimated the redshift for GRBs 941017 and 970111 using GRB990123 (with known redshift) as reference. The estimated redshifts for these bursts are typical values for long GRBs.
format Objeto de conferencia
Objeto de conferencia
author Sacahui, José Rodrigo
Guiriec, Sylvain
González, Maria Magdalena
Kouveliotou, Chryssa
Gehrels, Neil
McEnery, Julie
author_facet Sacahui, José Rodrigo
Guiriec, Sylvain
González, Maria Magdalena
Kouveliotou, Chryssa
Gehrels, Neil
McEnery, Julie
author_sort Sacahui, José Rodrigo
title BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
title_short BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
title_full BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
title_fullStr BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
title_full_unstemmed BATSE data support the multicomponent model for Gamma Ray Bursts prompt emission
title_sort batse data support the multicomponent model for gamma ray bursts prompt emission
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/168112
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AT gonzalezmariamagdalena batsedatasupportthemulticomponentmodelforgammarayburstspromptemission
AT kouveliotouchryssa batsedatasupportthemulticomponentmodelforgammarayburstspromptemission
AT gehrelsneil batsedatasupportthemulticomponentmodelforgammarayburstspromptemission
AT mceneryjulie batsedatasupportthemulticomponentmodelforgammarayburstspromptemission
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