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

TL;DR

This study analyzes GRB071010B using multi-band data to evaluate its adherence to known gamma-ray burst correlations, finding it conforms to the ${ m E^{src}_{peak}-E_{iso}}$ relation but violates others, highlighting outlier behavior.

Contribution

The paper provides the first combined estimation of spectral and optical data for GRB071010B, testing the robustness of key GRB correlations with new multi-wavelength analysis.

Findings

GRB071010B follows the ${ m E^{src}_{peak}-E_{iso}}$ relation.

GRB071010B violates the ${ m E^{src}_{peak}-E_{ m ext{gamma}}}$ relation.

GRB071010B is an outlier in the ${ m E_{iso}-E^{src}_{peak}-t^{src}_{jet}}$ correlation.

Abstract

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.