English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We find a strong correlation between the peak energy at zero fluence ($\rmE_{peak,0}$) and the isotropic energy ($\rm E_{\gamma,iso}$) of the 22 pulsesof 9 Gamma Ray Bursts (GRB) detected by the Fermi satellite. The correlationholds for the individual pulses of each GRB, which shows the reality of thecorrelation. The derived correlation (Spearman correlation coefficient, $r$, is0.96) is much stronger compared to the correlations using $\rm E_{peak}$ (inplace of $\rm E_{peak,0}$) determined from the time-integrated spectrum ($r$ =0.8), or the time-resolved spectrum not accounting for broad pulse structures($r$ = 0.37), or the pulse-wise spectrum ($r$ = 0.89). Though the improvementin the $\rm E_{peak}$ - $\rm E_{\gamma,iso}$ relation (the Amati relation) fora pulse-wise analysis is known earlier, this is the first time a parameterderived from a joint spectral and timing fit to the data is shown to improvethe correlation. We suggest that $\rm E_{peak,0}$, rather than $\rm E_{peak}$,is intrinsic to a GRB pulse and a natural choice as the parameter in thepulse-wise correlation studies.

astrophysical journal/the astrophysical journal

Correlation between the isotropic energy and the peak energy at zero  fluence for the individual pulses of GRBs: towards an universal physical  correlation for the prompt emission