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X-ray luminous galaxy cluster

(term used for galaxy clusters found in X-ray surveys)

The term X-ray luminous galaxy cluster is generally used for a galaxy cluster discovered in an X-ray astronomical survey. An X-ray source is a galaxy cluster candidate if it does not vary over observation time (which would be too rapid for such a large source) and is an extended source and naturally, a suitable counterpart in optical or infrared can confirm the candidate. The discoveries will naturally be clusters that are bright in X-rays, and can be at substantial redshift and unlikely to be found otherwise. Identifying galaxy clusters in this manner allows the creation of data sets of distant examples for study.


(galaxy clusters,X-ray)
Further reading:
https://ui.adsabs.harvard.edu/abs/2011NJPh...13l5014F/abstract
https://ui.adsabs.harvard.edu/abs/2013MNRAS.433.2790L/abstract
https://cxc.harvard.edu/target_lists/cycle10/CLUSTERSOFGALAXIES10.html#10800395

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