Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties

Details Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties

2010-12-17

arxiv.org/abs/1012.3968v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

The subject of this work is similar to our paper arXiv:1004.1410, that was rejected because based on Fermi/GBM spectral prelim

Scientific paper

The Gamma-ray Burst Monitor (GBM) on board Fermi allows to study the spectra of Gamma Ray Bursts (GRBs) over an unprecedented wide energy range (8 keV - 35 MeV). We compare the spectral properties of short and long GRBs detected by the GBM (up to March 2010) with those of GRBs detected by the BATSE instrument on board the CGRO. GBM and BATSE long bursts have similar distributions of fluence (F), Epeak and peak flux (P) but GBM bursts have a slightly harder low-energy spectral index \alpha with respect to BATSE GRBs. GBM and BATSE short bursts have similar distributions of fluence, \alpha and peak flux, with GBM bursts having slightly larger Epeak. We discuss these properties in light of the found correlations between Epeak and the fluence and the peak flux. GBM bursts confirm that these correlations are not determined by instrumental selection effects. Indeed, GBM bursts extend the Epeak-Fluence and Epeak-P correlations both in fluence/peak flux and in peak energy. No GBM long burst with Epeak exceeding a few MeV is found, despite the possibility of detecting it. Similarly to what found with BATSE, there are 3% of GBM long bursts (and almost all short ones) that are outliers at more than 3\sigma of the Epeak-Eiso correlation. Instead there is no outlier of the Epeak-Lp,iso correlation, for both long and short GBM bursts.

Affiliated with

Also associated with

No associations

Rating

Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermi/GBM and BATSE Gamma-Ray Bursts: comparison of the spectral properties will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-639657