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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In the latest data release from the Fermi $\gamma$-Ray Space Telescope (the4th Fermi LAT 12-year Catalog or 4FGL) more than 50% of the Galactic sourcesare yet to be identified. We observed thirteen unidentified Fermi LAT sourceswith Chandra X-Ray Observatory (CXO) to explore their nature. We report theresults of the classification of X-ray sources in the fields of these$\gamma$-ray sources and discuss the implications for their nature. We use themultiwavelength (MW) data for machine-learning classification accompanied by amore detailed spectral/variability analysis for brighter sources. Seven 4FGLsources have $\gamma$-ray pulsars within their position error ellipses. Threeof these pulsars are either detected in the CXO images or show hints of X-rayemission. Within the positional uncertainties of three 4FGL sources we detectX-ray sources that may be yet unknown pulsars, depending on the MW association.In addition to point sources, we discovered 2 extended sources one of which islikely to be a bowshock pulsar-wind nebula associated with PSR J1358.3-6026.Finally, we classify other X-ray sources detected in these observations andreport most interesting classifications.

Chandra X-ray Observatory Observations of 13 Fermi LAT Sources