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Chandra X-ray Observatory Observations of 13 Fermi LAT Sources by Rangelov, Blagoy; Yang, Hui; Williams, Brice; Kargaltsev, Oleg; Hare, Jeremy; Martinic, Kean is a scholarly article available to read on EtoBox.

What is Chandra X-ray Observatory Observations of 13 Fermi LAT Sources about?

In the latest data release from the Fermi $\gamma$-ray Space Telescope (the 4th Fermi LAT 14 yr Catalog, or 4FGL), more than 50% of the Galactic sources are yet to be identified. We observed 13 unidentified Fermi LAT sources with the Chandra X-Ray Observatory to explore their nature. We report the results of the classification of X-ray sources in the fields of these $\gamma$-ray sources and discuss the implications for their nature. We use multiwavelength (MW) data for a machine-learning classification, accompanied by a more detailed spectral/variability analysis for brighter sources. Eight 4FGL sources have $\gamma$-ray pulsars within their position error ellipses. We consider three of these pulsars (PSR J1906+0722, PSR J1105-6037, and PSR J1358-6025) to be detected in X-rays, while PSR J1203-6242 shows a hint of X-ray emission. Within the positional uncertainties of three of the 4FGL sources, we detect X-ray sources that may be yet unknown pulsars, depending on the MW association. In addition to point sources, we discovered two extended sources, one of which is likely to be a bow-shock pulsar-wind nebula associated with PSR J1358-6025. Finally, we classify other X-ray sources det

Author

Rangelov, Blagoy; Yang, Hui; Williams, Brice; Kargaltsev, Oleg; Hare, Jeremy; Martinic, Kean

Published

2023

Language

EN