Swifts GRB GRB071010B : outlier of the $\rm E^{src}_{peak} - E_γ$ and ${\rm E_{iso}-E^{src}_{peak}-t^{src}_{jet}}$ correlations

Details Swifts GRB GRB071010B : outlier of the $\rm E^{src}_{peak} - E_γ$ and ${\rm E_{iso}-E^{src}_{peak}-t^{src}_{jet}}$ correlations Swifts GRB GRB071010B : outlier of the $\rm E^{src}_{peak} - E_γ$ and ${\rm E_{iso}-E^{src}_{peak}-t^{src}_{jet}}$ correlations

2009-10-30

arxiv.org/abs/0910.5774v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

15 pages, 5 figures, Accepted for Publication in ApJ Letter

Scientific paper

We present multi-band results for GRB071010B based on \Swift, \Suzaku, and ground-based optical observations. This burst is an ideal target to evaluate the robustness of the ${\rm E^{src}_{peak}-E_{iso}}$ and ${\rm E^{src}_{peak}-E_{\gamma}}$ relations, whose studies have been in stagnation due to the lack of the combined estimation of $\rm E^{src}_{peak}$ and long term optical monitoring. The joint prompt spectral fitting using \Swift/Burst Alert Telescope and \Suzaku/Wide-band All sky Monitor data yielded the spectral peak energy as E$^{src}_{peak}$ of $86.5^{+6.4}_{-6.3}$ keV and E$_{iso}$ of $2.25^{+0.19}_{-0.16}\times10^{52}$ erg with $z=0.947$. The optical afterglow light curve is well fitted by a simple power law with temporal index $\alpha=-0.60\pm0.02$. The lower limit of temporal break in the optical light curve is 9.8 days. Our multi-wavelength analysis reveals that GRB071010B follows ${\rm E^{src}_{peak}-E_{iso}}$ but violates the ${\rm E^{src}_{peak}-E_{\gamma}}$ and ${\rm E_{iso}-E^{src}_{peak}-t^{src}_{jet}}$ at more than the 3$\sigma$ level.

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