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

Gamma-ray bursts (GRBs) are the most luminous astrophysical events observedso far. They are conventionally classified into long and short ones dependingon their time duration, $T_{90}$. Because of the advantage their high redshiftsoffer, many efforts have been made to apply GRBs to cosmology. The key to thisis to find correlations between some measurable properties of GRBs and theenergy or the luminosity of GRBs. These correlations are usually referred to asluminosity relations and are helpful in understanding the GRBs themselves. Inthis paper, we explored such correlations in the X-ray emission of GRBs. TheX-ray emission of GRBs observed by \emph{Swift} has the exponential functionalform in the prompt phase and relaxes to a power-law decay at time $T_p$. Wehave assumed a linear relation between $\log L_{X, p}$ (with $L_{X, p}$ beingthe X-ray luminosity at $T_p$) and $\log [T_p/(1+z)]$, but there is someevidence for curvature in the data and the true relationship between $L_{X, p}$and $T_p/(1+z)$ may be a broken power law. The limited GRB sample used in ouranalysis is still not sufficient for us to conclude whether the break is realor just an illusion caused by outliers. We considered both cases in ouranalysis and discussed the implications of the luminosity relation, especiallyon the time duration of GRBs and their classification.

A new luminosity relation for gamma-ray bursts and its implication