XBONG
(X-ray bright optical normal galaxy)
(galaxy bright with X-rays but with no evident AGN)
An XBONG (for X-ray bright optical normal galaxy)
is a galaxy in which no active galactic nucleus (AGN) is evident (e.g., not a
Seyfert galaxy), yet shows substantial X-ray luminosity.
(galaxy type,X-ray)
Further reading:
https://en.wikipedia.org/wiki/Glossary_of_astronomy#X
https://ui.adsabs.harvard.edu/abs/2005MNRAS.358..131G/abstract
Index