X-ray sources near 2 bright {gamma}-ray sources

Both were also detected previously by EGRET, and despite dedicated multi-wavelength follow-up, they are still not associated with established classes of {gamma}-ray emitters like pulsars or radio-loud active galactic nuclei.

X-ray sources found in the ACIS-I fields of view are cataloged, and their basic properties are determined. These are discussed as candidate counterparts to 0FGL J1311.9-3419 and 0FGL J1653.4-0200, with particular emphasis on the brightest of the 9 and 13 Chandra sources detected within the respective Fermi-LAT 95% confidence regions. Further follow-up studies, including optical photometric and spectroscopic observations, are necessary to identify these X-ray candidate counterparts in order to ultimately reveal the nature of these enigmatic {gamma}-ray objects.