# Abell 520

> galaxy cluster

**Wikidata**: [Q318654](https://www.wikidata.org/wiki/Q318654)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Abell_520)  
**Source**: https://4ort.xyz/entity/abell-520


## References

1. SIMBAD
2. Freebase Data Dumps. 2013
3. The L_X_-{sigma} relation for galaxies and clusters of galaxies
4. The Einstein Observatory Extended Medium-Sensitivity Survey. II - The optical identifications