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 present the results of a cluster search in the Fermi-LAT Pass 8 gamma-raysky by means of the Minimum Spanning Tree algorithm, at energies higher than 10GeV and at Galactic latitudes higher than 25 degrees. The selected clustershave a minimum number of photons higher than or equal to 5, a high degree ofconcentration, and are without a clear corresponding counterpart in blazarcatalogues. A sample of 30 possible gamma-ray sources was obtained. Theseobjects were verified by applying the standard Maximum Likelihood analysis onthe Fermi-LAT data. A search for possible radio counterparts in a circle havinga radius of 6 arcmin was performed, finding several interesting objects, themajority of them without optical spectroscopical data. These can be consideredas new blazar candidates. Some of them were already noticed as possible blazarsor Active Galactic Nuclei in previous surveys, but never associated with highenergy emission. These possible counterparts are reported and their propertiesare discussed.

Application of the MST clustering to the high energy gamma-ray sky. IV - Blazar candidates found as possible counterparts of photon clusters