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

Aims. High Synchrotron Peaked blazars (HSPs) dominate the -ray sky atenergies larger than a few GeV; however, only a few hundred blazars of thistype have been catalogued so far. In this paper we present the 2WHSP sample,the largest and most complete list of HSP blazars available to date, which isan expansion of the 1WHSP catalog of gamma-ray source candidates off theGalactic plane.  Methods. We cross-matched a number of multi-wavelength surveys (in the radio,infrared and X-ray bands) and applied selection criteria based on the radio toIR and IR to X-ray spectral slopes. To ensure the selection of genuine HSPs weexamined the SED of each candidate and estimated the peak frequency of itssynchrotron emission ($\nu_{\rm peak}$) using the ASDC SED tool, including onlysources with Synchrotron peak $\nu_{\rm peak} > 10^{15}$ Hz (equivalent to$\nu_{\rm peak} > 4$ eV).  Results. We have assembled the largest and most complete catalog of HSPblazars to date, which includes 1691 sources. A number of populationproperties, such as infrared colours, synchrotron peak, redshift distributions,and -ray spectral properties, have been used to characterise the sample andmaximize completeness. We also derived the radio logN-logS distribution. Thiscatalog has already been used to provide seeds to discover new very high energyobjects within Fermi-LAT data and to look for the counterparts of neutrino andultra high energy cosmic ray sources, showing its potential for theidentification of promising high-energy gamma-ray sources and multi-messengertargets.

2WHSP: A catalog of HE and VHE gamma-ray blazars and blazar candidates