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

The High Energy X-ray telescope (HE) on-board the Hard X-ray ModulationTelescope (\textit{Insight}-HXMT) can serve as a wide Field of View (FOV)gamma-ray monitor with high time resolution ($\mu$s) and large effective area(up to thousands cm$^2$). We developed a pipeline to search for Gamma-RayBursts (GRBs), using the traditional signal-to-noise ratio (SNR) method forblind search and the coherent search method for targeted search. By taking intoaccount the location and spectrum of the burst and the detector response, thetargeted coherent search is more powerful to unveil weak and sub-thresholdbursts, especially those in temporal coincidence with Gravitational Wave (GW)events. Based on the original method in literature, we further improved thecoherent search to filter out false triggers caused by spikes in light curves,which are commonly seen in gamma-ray instruments (e.g. \textit{Fermi}/GBM,\textit{POLAR}). We show that our improved targeted coherent search methodcould eliminate almost all false triggers caused by spikes. Based on the firsttwo years of \textit{Insight}-HXMT/HE data, our targeted search recovered 40GRBs, which were detected by either \textit{Swift}/BAT or \textit{Fermi}/GBMbut too weak to be found in our blind search. With this coherent searchpipeline, the GRB detection sensitivity of \textit{Insight}-HXMT/HE isincreased to about 1.5E-08 erg/cm$^2$ (200 keV$-$3 MeV). We also used thistargeted coherent method to search \textit{Insight}-HXMT/HE data forelectromagnetic (EM) counterparts of LIGO-Virgo GW events (including O2 and O3aruns). However, we did not find any significant burst associated with GWevents.

Search for Gamma-Ray Bursts and Gravitational Wave Electromagnetic Counterparts with High Energy X-ray Telescope of \textit{Insight}-HXMT