# Q81424978
**Wikidata**: [Q81424978](https://www.wikidata.org/wiki/Q81424978)  
**Source**: https://4ort.xyz/entity/q81424978


## References

1. SIMBAD
2. ASAS photometry of ROSAT sources. I. Periodic variable stars coincident with bright sources from the ROSAT All Sky Survey
3. The Tycho-2 catalogue of the 2.5 million brightest stars
4. VizieR Online Data Catalog: 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
5. Gaia Data Release 2
6. A systematic study of X-ray variability in the ROSAT all-sky survey